D-Link xStack DGS-3420 Series User manual

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
i
Information in this document is subject to change without notice.
© 2013 D-Link Corporation. All rights reserved.
Reproduction of this document in any manner whatsoever without the written permission of D-Link Corporation is strictly forbidden.
Trademarks used in this text: D-Link and the D-LINK logo are trademarks of D-Link Corporation; Microsoft and Windows are registered trademarks of
Microsoft Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. D-
Link Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
February, 2013 P/N 651GS3420035G

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
ii
Table of Contents
Intended Readers............................................................................................................................................................1
Typographical Conventions.............................................................................................................................................1
Notes, Notices and Cautions...........................................................................................................................................1
Safety Instructions...........................................................................................................................................................1
Safety Cautions ...........................................................................................................................................................2
General Precautions for Rack-Mountable Products........................................................................................................3
Protecting Against Electrostatic Discharge.....................................................................................................................4
Chapter 1 Web-based Switch Configuration......................................................................................5
Introduction......................................................................................................................................................................5
Login to the Web Manager..............................................................................................................................................5
Web-based User Interface..............................................................................................................................................5
Areas of the User Interface..........................................................................................................................................6
Web Pages......................................................................................................................................................................6
Chapter 2 System Configuration.........................................................................................................8
Device Information ..........................................................................................................................................................8
System Information Settings...........................................................................................................................................9
Port Configuration .........................................................................................................................................................10
DDM...........................................................................................................................................................................10
Port Settings..............................................................................................................................................................17
Port Description Settings...........................................................................................................................................18
Port Error Disabled....................................................................................................................................................19
Port Media Type ........................................................................................................................................................20
Port Auto Negotiation Information .............................................................................................................................20
Jumbo Frame Settings ..............................................................................................................................................21
EEE Settings .............................................................................................................................................................22
PoE................................................................................................................................................................................23
PoE System Settings.................................................................................................................................................24
PoE Port Settings ......................................................................................................................................................26
Serial Port Settings .......................................................................................................................................................27
Warning Temperature Settings.....................................................................................................................................27
System Log configuration..............................................................................................................................................28
System Log Settings..................................................................................................................................................28
System Log Server Settings......................................................................................................................................28
System Log................................................................................................................................................................29
System Log & Trap Settings......................................................................................................................................30
System Severity Settings...........................................................................................................................................31
Time Range Settings.....................................................................................................................................................32
Port Group Settings.......................................................................................................................................................32
Time Settings ................................................................................................................................................................33
User Accounts Settings.................................................................................................................................................33
Command Logging Settings..........................................................................................................................................35
Stacking.........................................................................................................................................................................35
Stacking Device Table...............................................................................................................................................37
Stacking Mode Settings.............................................................................................................................................37

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
iii
Chapter 3 Management......................................................................................................................39
ARP...............................................................................................................................................................................39
Static ARP Settings...................................................................................................................................................39
Proxy ARP Settings...................................................................................................................................................40
ARP Table .................................................................................................................................................................40
Gratuitous ARP .............................................................................................................................................................41
Gratuitous ARP Global Settings................................................................................................................................41
Gratuitous ARP Settings............................................................................................................................................42
IPv6 Neighbor Settings .................................................................................................................................................42
IP Interface....................................................................................................................................................................43
System IP Address Settings......................................................................................................................................44
Interface Settings.......................................................................................................................................................45
Loopback Interface Settings......................................................................................................................................49
Management Settings ...................................................................................................................................................50
Out of Band Management Settings...............................................................................................................................51
Session Table................................................................................................................................................................52
Single IP Management..................................................................................................................................................52
Single IP Settings ......................................................................................................................................................53
Topology....................................................................................................................................................................54
Firmware Upgrade.....................................................................................................................................................61
Configuration File Backup/Restore............................................................................................................................61
Upload Log File .........................................................................................................................................................62
SNMP Settings..............................................................................................................................................................62
SNMP Global Settings...............................................................................................................................................63
SNMP Traps Settings................................................................................................................................................64
SNMP Linkchange Traps Settings ............................................................................................................................64
SNMP View Table Settings .......................................................................................................................................65
SNMP Community Table Settings.............................................................................................................................66
SNMP Group Table Settings.....................................................................................................................................67
SNMP Engine ID Settings .........................................................................................................................................68
SNMP User Table Settings........................................................................................................................................69
SNMP Host Table Settings........................................................................................................................................70
SNMP v6Host Table Settings....................................................................................................................................71
RMON Settings..........................................................................................................................................................71
SNMP Community Encryption Settings.....................................................................................................................72
SNMP Community Masking Settings ........................................................................................................................72
Telnet Settings ..............................................................................................................................................................73
Web Settings.................................................................................................................................................................74
Power Saving................................................................................................................................................................74
LED State Settings ....................................................................................................................................................74
Power Saving Settings ..............................................................................................................................................75
Power Saving LED Settings ......................................................................................................................................76
Power Saving Port Settings.......................................................................................................................................76
Chapter 4 L2 Features .......................................................................................................................78
VLAN.............................................................................................................................................................................78
802.1Q VLAN Settings ..............................................................................................................................................83
802.1v Protocol VLAN...............................................................................................................................................86

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
iv
Asymmetric VLAN Settings .......................................................................................................................................88
GVRP.........................................................................................................................................................................88
MAC-based VLAN Settings.......................................................................................................................................91
Private VLAN Settings...............................................................................................................................................91
PVID Auto Assign Settings........................................................................................................................................93
Subnet VLAN.............................................................................................................................................................93
Voice VLAN ...............................................................................................................................................................95
VLAN Trunk Settings.................................................................................................................................................99
Browse VLAN ..........................................................................................................................................................100
Show VLAN Ports....................................................................................................................................................100
QinQ............................................................................................................................................................................101
QinQ Settings ..........................................................................................................................................................103
VLAN Translation Settings ......................................................................................................................................104
VLAN Translation Port Mapping Settings................................................................................................................104
VLAN Translation Profile List ..................................................................................................................................105
Layer 2 Protocol Tunneling Settings...........................................................................................................................107
Spanning Tree.............................................................................................................................................................108
STP Bridge Global Settings.....................................................................................................................................110
STP Port Settings....................................................................................................................................................112
MST Configuration Identification .............................................................................................................................113
STP Instance Settings.............................................................................................................................................114
MSTP Port Information............................................................................................................................................115
Link Aggregation .........................................................................................................................................................116
Port Trunking Settings.............................................................................................................................................117
LACP Port Settings..................................................................................................................................................118
FDB.............................................................................................................................................................................119
Static FDB Settings .................................................................................................................................................119
MAC Notification Settings........................................................................................................................................121
MAC Address Aging Time Settings.........................................................................................................................122
MAC Address Table ................................................................................................................................................122
ARP & FDB Table....................................................................................................................................................123
L2 Multicast Control ....................................................................................................................................................124
IGMP Proxy .............................................................................................................................................................124
IGMP Snooping .......................................................................................................................................................127
MLD Proxy...............................................................................................................................................................136
MLD Snooping.........................................................................................................................................................138
Multicast VLAN........................................................................................................................................................147
IP Multicast VLAN Replication.................................................................................................................................154
Multicast Filtering ........................................................................................................................................................156
IPv4 Multicast Filtering ............................................................................................................................................156
IPv6 Multicast Filtering ............................................................................................................................................159
Multicast Filtering Mode...........................................................................................................................................162
ERPS Settings.............................................................................................................................................................163
LLDP ...........................................................................................................................................................................166
LLDP........................................................................................................................................................................166
LLDP-MED...............................................................................................................................................................175
NLB FDB Settings.......................................................................................................................................................178

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
v
PTP .............................................................................................................................................................................179
PTP Global Settings................................................................................................................................................180
PTP Port Settings....................................................................................................................................................180
PTP Boundary Clock Settings.................................................................................................................................181
PTP Boundary Port Settings ...................................................................................................................................182
PTP Peer to Peer Transparent Port Settings..........................................................................................................184
PTP Clock Information.............................................................................................................................................184
PTP Port Information...............................................................................................................................................185
PTP Foreign Master Records Port Information.......................................................................................................186
Chapter 5 L3 Features .....................................................................................................................187
IPv4 Static/Default Route Settings..............................................................................................................................187
IPv4 Route Table ........................................................................................................................................................188
IPv6 Static/Default Route Settings..............................................................................................................................189
IPv6 Route Table ........................................................................................................................................................190
Policy Route Settings..................................................................................................................................................190
IP Forwarding Table....................................................................................................................................................192
Route Preference Settings..........................................................................................................................................193
Route Redistribution....................................................................................................................................................193
Route Redistribution Settings..................................................................................................................................193
IPv6 Route Redistribution Settings..........................................................................................................................194
IP Tunnel.....................................................................................................................................................................195
IP Tunnel Settings ...................................................................................................................................................195
IP Tunnel GRE Settings ..........................................................................................................................................196
RIP ..............................................................................................................................................................................198
RIP Settings.............................................................................................................................................................199
RIPng.......................................................................................................................................................................201
VRRP ..........................................................................................................................................................................203
VRRP Global Settings.............................................................................................................................................203
VRRP Virtual Router Settings..................................................................................................................................203
VRRP Authentication Settings.................................................................................................................................206
Chapter 6 QoS..................................................................................................................................207
802.1p Settings ...........................................................................................................................................................208
802.1p Default Priority Settings...............................................................................................................................208
802.1p User Priority Settings...................................................................................................................................209
Bandwidth Control.......................................................................................................................................................210
Bandwidth Control Settings.....................................................................................................................................210
Queue Bandwidth Control Settings .........................................................................................................................212
Traffic Control Settings................................................................................................................................................213
DSCP ..........................................................................................................................................................................216
DSCP Trust Settings ...............................................................................................................................................216
DSCP Map Settings.................................................................................................................................................217
HOL Blocking Prevention............................................................................................................................................218
Scheduling Settings ....................................................................................................................................................219
QoS Scheduling.......................................................................................................................................................219
QoS Scheduling Mechanism...................................................................................................................................220
WRED .........................................................................................................................................................................221
WRED Port Settings................................................................................................................................................221

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
vi
WRED Profile Settings ............................................................................................................................................222
Chapter 7 ACL..................................................................................................................................224
ACL Configuration Wizard...........................................................................................................................................224
Access Profile List.......................................................................................................................................................225
Adding an Ethernet ACL Profile ..............................................................................................................................226
Adding an IPv4 ACL Profile.....................................................................................................................................230
Adding an IPv6 ACL Profile.....................................................................................................................................234
Adding a Packet Content ACL Profile .....................................................................................................................238
CPU Access Profile List..............................................................................................................................................242
Adding a CPU Ethernet ACL Profile........................................................................................................................243
Adding a CPU IPv4 ACL Profile ..............................................................................................................................247
Adding a CPU IPv6 ACL Profile ..............................................................................................................................251
Adding a CPU Packet Content ACL Profile.............................................................................................................254
ACL Finder..................................................................................................................................................................257
ACL Flow Meter...........................................................................................................................................................257
Egress Access Profile List...........................................................................................................................................261
Adding an Ethernet ACL Profile ..............................................................................................................................262
Adding an IPv4 Egress ACL Profile.........................................................................................................................265
Adding an IPv6 Egress ACL Profile.........................................................................................................................269
Egress ACL Flow Meter ..............................................................................................................................................273
Chapter 8 Security ...........................................................................................................................276
802.1X.........................................................................................................................................................................276
802.1X Global Settings............................................................................................................................................280
802.1X Port Settings................................................................................................................................................281
802.1X User Settings...............................................................................................................................................283
Guest VLAN Settings...............................................................................................................................................283
Authenticator State..................................................................................................................................................285
Authenticator Statistics............................................................................................................................................285
Authenticator Session Statistics..............................................................................................................................286
Authenticator Diagnostics........................................................................................................................................287
Initialize Port-based Port(s).....................................................................................................................................288
Initialize Host-based Port(s) ....................................................................................................................................289
Reauthenticate Port-based Port(s)..........................................................................................................................289
Reauthenticate Host-based Port(s).........................................................................................................................290
RADIUS.......................................................................................................................................................................290
Authentication RADIUS Server Settings .................................................................................................................290
RADIUS Authentication ...........................................................................................................................................291
RADIUS Account Client...........................................................................................................................................293
IP-MAC-Port Binding (IMPB).......................................................................................................................................294
IMPB Global Settings ..............................................................................................................................................294
IMPB Port Settings ..................................................................................................................................................296
IMPB Entry Settings ................................................................................................................................................297
MAC Block List ........................................................................................................................................................298
DHCP Snooping ......................................................................................................................................................298
ND Snooping...........................................................................................................................................................300
MAC-based Access Control (MAC).............................................................................................................................301
MAC-based Access Control Settings ......................................................................................................................302

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
vii
MAC-based Access Control Local Settings.............................................................................................................303
MAC-based Access Control Authentication State...................................................................................................304
Web-based Access Control (WAC).............................................................................................................................305
WAC Global Settings...............................................................................................................................................307
WAC User Settings..................................................................................................................................................308
WAC Port Settings...................................................................................................................................................308
WAC Authentication State.......................................................................................................................................309
WAC Customize Page.............................................................................................................................................310
Japanese Web-based Access Control (JWAC)..........................................................................................................311
JWAC Global Settings.............................................................................................................................................311
JWAC Port Settings.................................................................................................................................................314
JWAC User Settings................................................................................................................................................314
JWAC Authentication State.....................................................................................................................................316
JWAC Customize Page Language..........................................................................................................................316
JWAC Customize Page...........................................................................................................................................317
Compound Authentication...........................................................................................................................................318
Compound Authentication Settings.........................................................................................................................318
Compound Authentication Guest VLAN Settings....................................................................................................320
Compound Authentication MAC Format Settings ...................................................................................................321
IGMP Access Control Settings....................................................................................................................................321
Port Security................................................................................................................................................................323
Port Security Settings..............................................................................................................................................323
Port Security VLAN Settings ...................................................................................................................................325
Port Security Entries................................................................................................................................................325
ARP Spoofing Prevention Settings .............................................................................................................................326
BPDU Attack Protection..............................................................................................................................................327
Loopback Detection Settings ......................................................................................................................................329
NetBIOS Filtering Settings..........................................................................................................................................330
Traffic Segmentation Settings.....................................................................................................................................331
DHCP Server Screening.............................................................................................................................................332
DHCP Server Screening Port Settings....................................................................................................................332
DHCP Offer Permit Entry Settings ..........................................................................................................................333
Filter DHCPv6 Server..............................................................................................................................................333
Filter ICMPv6...........................................................................................................................................................334
Access Authentication Control....................................................................................................................................336
Enable Admin ..........................................................................................................................................................337
Authentication Policy Settings.................................................................................................................................338
Application Authentication Settings.........................................................................................................................338
Accounting Settings.................................................................................................................................................339
Authentication Server Group Settings.....................................................................................................................340
Authentication Server Settings................................................................................................................................341
Login Method Lists Settings ....................................................................................................................................342
Enable Method Lists Settings..................................................................................................................................344
Accounting Method Lists Settings ...........................................................................................................................345
Local Enable Password Settings.............................................................................................................................346
Authentication Source IP Interface Settings............................................................................................................346
SSL Settings................................................................................................................................................................347

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
viii
SSL Certification Settings........................................................................................................................................349
SSH.............................................................................................................................................................................350
SSH Settings ...........................................................................................................................................................351
SSH Authentication Method and Algorithm Settings...............................................................................................352
SSH User Authentication List..................................................................................................................................353
DoS Attack Prevention Settings..................................................................................................................................354
Trusted Host Settings..................................................................................................................................................356
Safeguard Engine Settings .........................................................................................................................................357
SFTP Server Settings .................................................................................................................................................359
Chapter 9 Network Application.......................................................................................................361
DHCP..........................................................................................................................................................................361
DHCP Relay ............................................................................................................................................................361
DHCP Server...........................................................................................................................................................367
DHCPv6 Server.......................................................................................................................................................375
DHCPv6 Relay ........................................................................................................................................................379
DHCP Local Relay Settings.....................................................................................................................................381
DNS.............................................................................................................................................................................381
DNS Relay...............................................................................................................................................................382
DNS Resolver..............................................................................................................................................................383
DNS Resolver Global Settings ................................................................................................................................383
DNS Resolver Static Name Server Settings ...........................................................................................................384
DNS Resolver Dynamic Name Server Table ..........................................................................................................384
DNS Resolver Static Host Name Settings...............................................................................................................385
DNS Resolver Dynamic Host Name Table..............................................................................................................385
RCP Server Settings...................................................................................................................................................386
SMTP Settings ............................................................................................................................................................386
SNTP...........................................................................................................................................................................389
SNTP Settings.........................................................................................................................................................389
Time Zone Settings .................................................................................................................................................389
UDP.............................................................................................................................................................................391
UDP Helper .............................................................................................................................................................391
Flash File System Settings..........................................................................................................................................393
Chapter 10 OAM.................................................................................................................................396
CFM.............................................................................................................................................................................396
CFM Settings...........................................................................................................................................................396
CFM Port Settings ...................................................................................................................................................403
CFM MIPCCM Table ...............................................................................................................................................403
CFM Loopback Settings..........................................................................................................................................404
CFM Linktrace Settings...........................................................................................................................................405
CFM Packet Counter...............................................................................................................................................406
CFM Fault Table......................................................................................................................................................406
CFM MP Table ........................................................................................................................................................407
Ethernet OAM..............................................................................................................................................................407
Ethernet OAM Settings............................................................................................................................................407
Ethernet OAM Configuration Settings .....................................................................................................................408
Ethernet OAM Event Log.........................................................................................................................................409
Ethernet OAM Statistics ..........................................................................................................................................410

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
ix
DULD Settings.............................................................................................................................................................411
Cable Diagnostics .......................................................................................................................................................412
Chapter 11 Monitoring.......................................................................................................................414
Utilization.....................................................................................................................................................................414
CPU Utilization ........................................................................................................................................................414
DRAM & Flash Utilization........................................................................................................................................415
Port Utilization .........................................................................................................................................................415
Statistics......................................................................................................................................................................416
Port Statistics...........................................................................................................................................................416
Packet Size..............................................................................................................................................................427
Mirror...........................................................................................................................................................................429
Port Mirror Settings..................................................................................................................................................430
RSPAN Settings ......................................................................................................................................................431
sFlow...........................................................................................................................................................................432
sFlow Global Settings..............................................................................................................................................432
sFlow Analyzer Server Settings ..............................................................................................................................433
sFlow Flow Sampler Settings..................................................................................................................................434
sFlow Counter Poller Settings.................................................................................................................................435
Ping .............................................................................................................................................................................435
Broadcast Ping Relay Settings................................................................................................................................435
Ping Test..................................................................................................................................................................436
Trace Route.................................................................................................................................................................437
Peripheral....................................................................................................................................................................439
Device Environment ................................................................................................................................................439
External Alarm Settings...........................................................................................................................................439
Chapter 12 Save and Tools ...............................................................................................................441
Save Configuration / Log.............................................................................................................................................441
Stacking Information ...................................................................................................................................................441
Download Firmware ....................................................................................................................................................443
Download Firmware from TFTP ..............................................................................................................................443
Download Firmware from RCP................................................................................................................................444
Download Firmware from HTTP..............................................................................................................................444
Upload Firmware.........................................................................................................................................................445
Upload Firmware to TFTP.......................................................................................................................................445
Upload Firmware to RCP.........................................................................................................................................446
Upload Firmware to HTTP.......................................................................................................................................446
Download Configuration..............................................................................................................................................446
Download Configuration from TFTP........................................................................................................................447
Download Configuration from RCP .........................................................................................................................447
Download Configuration from HTTP .......................................................................................................................448
Upload Configuration ..................................................................................................................................................448
Upload Configuration to TFTP.................................................................................................................................448
Upload Configuration to RCP..................................................................................................................................449
Upload Configuration to HTTP................................................................................................................................450
Upload Log File...........................................................................................................................................................450
Upload Log to TFTP................................................................................................................................................450
Upload Log to RCP..................................................................................................................................................451

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
x
Upload Log to HTTP................................................................................................................................................452
Reset...........................................................................................................................................................................452
Reboot System............................................................................................................................................................453
Appendix A - Password Recovery Procedure .......................................................................................454
Appendix B - System Log Entries..........................................................................................................455
Appendix C - Trap Entries.......................................................................................................................484

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
1
Intended Readers
Typographical Conventions
Notes, Notices and Cautions
Safety Instructions
General Precautions for Rack-Mountable Products
Protecting Against Electrostatic Discharge
The DGS-3420 Series Web UI Reference Guide contains information for setup and management of the Switch. This
manual is intended for network managers familiar with network management concepts and terminology.
Typographical Conventions
Convention Description
[ ] In a command line, square brackets indicate an optional entry. For example: [copy
filename] means that optionally you can type copy followed by the name of the file. Do
not type the brackets.
Bold font Indicates a button, a toolbar icon, menu, or menu item. For example: Open the File
menu and choose Cancel. Used for emphasis. May also indicate system messages or
prompts appearing on screen. For example: You have mail. Bold font is also used to
represent filenames, program names and commands. For example: use the copy
command.
Boldface Typewriter
Font
Indicates commands and responses to prompts that must be typed exactly as printed in
the manual.
Initial capital letter Indicates a window name. Names of keys on the keyboard have initial capitals. For
example: Click Enter.
Menu Name > Menu
Option Menu Name > Menu Option Indicates the menu structure. Device > Port > Port Properties means the Port Properties menu option under the Port menu option that is
located under the Device menu.
Notes, Notices and Cautions
A NOTE indicates important information that helps make better use of the device.
A NOTICE indicates either potential damage to hardware or loss of data and tells how to avoid the
problem.
A CAUTION indicates a potential for property damage, personal injury, or death.
Safety Instructions

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
2
Use the following safety guidelines to ensure your own personal safety and to help protect your system from potential
damage. Throughout this safety section, the caution icon ( ) is used to indicate cautions and precautions that need
to be reviewed and followed.
Safety Cautions
To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment observe the following
precautions:
•Observe and follow service markings.
oDo not service any product except as explained in the system documentation.
oOpening or removing covers that are marked with the triangular symbol with a lightning bolt may
expose the user to electrical shock.
oOnly a trained service technician should service components inside these compartments.
•If any of the following conditions occur, unplug the product from the electrical outlet and replace the part or
contact your trained service provider:
oDamage to the power cable, extension cable, or plug.
oAn object has fallen into the product.
oThe product has been exposed to water.
oThe product has been dropped or damaged.
oThe product does not operate correctly when the operating instructions are correctly followed.
•Keep your system away from radiators and heat sources. Also, do not block cooling vents.
•Do not spill food or liquids on system components, and never operate the product in a wet environment. If the
system gets wet, see the appropriate section in the troubleshooting guide or contact your trained service
provider.
•Do not push any objects into the openings of the system. Doing so can cause fire or electric shock by shorting
out interior components.
•Use the product only with approved equipment.
•Allow the product to cool before removing covers or touching internal components.
•Operate the product only from the type of external power source indicated on the electrical ratings label. If
unsure of the type of power source required, consult your service provider or local power company.
•To help avoid damaging the system, be sure the voltage selection switch (if provided) on the power supply is
set to match the power available at the Switch’s location:
o115 volts (V)/60 hertz (Hz) in most of North and South America and some Far Eastern countries such
as South Korea and Taiwan
o100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan
o230 V/50 Hz in most of Europe, the Middle East, and the Far East
•Also, be sure that attached devices are electrically rated to operate with the power available in your location.
•Use only approved power cable(s). If you have not been provided with a power cable for your system or for any
AC-powered option intended for your system, purchase a power cable that is approved for use in your country.
The power cable must be rated for the product and for the voltage and current marked on the product's
electrical ratings label. The voltage and current rating of the cable should be greater than the ratings marked
on the product.
•To help prevent electric shock, plug the system and peripheral power cables into properly grounded electrical
outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use
adapter plugs or remove the grounding prong from a cable. If using an extension cable is necessary, use a 3-
wire cable with properly grounded plugs.
•Observe extension cable and power strip ratings. Make sure that the total ampere rating of all products
plugged into the extension cable or power strip does not exceed 80 percent of the ampere ratings limit for the
extension cable or power strip.
•To help protect the system from sudden, transient increases and decreases in electrical power, use a surge
suppressor, line conditioner, or uninterruptible power supply (UPS).

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
3
•Position system cables and power cables carefully; route cables so that they cannot be stepped on or tripped
over. Be sure that nothing rests on any cables.
•Do not modify power cables or plugs. Consult a licensed electrician or your power company for site
modifications. Always follow your local/national wiring rules.
•When connecting or disconnecting power to hot-pluggable power supplies, if offered with your system, observe
the following guidelines:
oInstall the power supply before connecting the power cable to the power supply.
oUnplug the power cable before removing the power supply.
oIf the system has multiple sources of power, disconnect power from the system by unplugging all
power cables from the power supplies.
•Move products with care; ensure that all casters and/or stabilizers are firmly connected to the system. Avoid
sudden stops and uneven surfaces.
General Precautions for Rack-Mountable Products
Observe the following precautions for rack stability and safety. Also, refer to the rack installation documentation
accompanying the system and the rack for specific caution statements and procedures.
•Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to
various peripherals or supporting hardware.
CAUTION: Installing systems in a rack without the front and side stabilizers installed could cause the rack
to tip over, potentially resulting in bodily injury under certain circumstances. Therefore, always install the
stabilizers before installing components in the rack. After installing system/components in a rack, never pull
more than one component out of the rack on its slide assemblies at one time. The weight of more than one
extended component could cause the rack to tip over and may result in serious injury.
•Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor, and
that the full weight of the rack rests on the floor. Install front and side stabilizers on a single rack or front
stabilizers for joined multiple racks before working on the rack.
•Always load the rack from the bottom up, and load the heaviest item in the rack first.
•Make sure that the rack is level and stable before extending a component from the rack.
•Use caution when pressing the component rail release latches and sliding a component into or out of a rack;
the slide rails can pinch your fingers.
•After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the
component into the rack.
•Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not
exceed 80 percent of the branch circuit rating.
•Ensure that proper airflow is provided to components in the rack.
•Do not step on or stand on any component when servicing other components in a rack.
NOTE: A qualified electrician must perform all connections to DC power and to safety grounds. All
electrical wiring must comply with applicable local or national codes and practices.
CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a suitably
installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if
uncertain that suitable grounding is available.

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
4
CAUTION: The system chassis must be positively grounded to the rack cabinet frame. Do not attempt to
connect power to the system until grounding cables are connected. Completed power and safety ground
wiring must be inspected by a qualified electrical inspector. An energy hazard will exist if the safety ground
cable is omitted or disconnected.
Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside the system. To prevent static damage, discharge static electricity
from your body before touching any of the electronic components, such as the microprocessor. This can be done by
periodically touching an unpainted metal surface on the chassis.
The following steps can also be taken prevent damage from electrostatic discharge (ESD):
1. When unpacking a static-sensitive component from its shipping carton, do not remove the component from the
antistatic packing material until ready to install the component in the system. Just before unwrapping the
antistatic packaging, be sure to discharge static electricity from your body.
2. When transporting a sensitive component, first place it in an antistatic container or packaging.
3. Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads, workbench pads
and an antistatic grounding strap.

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
5
Chapter 1 Web-based Switch Configuration
Introduction
Login to the Web Manager
Web-based User Interface
Web Pages
Introduction
Most software functions of the DGS-3420 Series switches can be managed, configured and monitored via the
embedded web-based (HTML) interface. Manage the Switch from remote stations anywhere on the network through a
standard browser. The browser acts as a universal access tool and can communicate directly with the Switch using the
HTTP protocol.
Login to the Web Manager
To begin managing the Switch, simply run the browser installed on your computer and point it to the IP address you
have defined for the device. The URL in the address bar should read something like: http://123.123.123.123, where the
numbers 123 represent the IP address of the Switch.
NOTE: The factory default IP address, for a normal port, is 10.90.90.90. The factory default IP address,
for the management port, is 192.168.0.1.
The Web User Interface’s authentication window can be accessed using the IP address of 10.90.90.90 (normal port),
as seen below.
Figure 1-1 Enter Network Password window
Leave both the User Name field and the Password field blank and click OK. This will open the Web-based user
interface. The Switch management features available in the web-based manager are explained below.
Web-based User Interface

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
6
The user interface provides access to various Switch configuration and management windows, allows you to view
performance statistics, and permits you to graphically monitor the system status.
Areas of the User Interface
The figure below shows the user interface. Three distinct areas divide the user interface, as described in the table.
Figure 1-2 Main Web-Manager page
Area
Number Function
Area 1 Select the menu or window to display. Open folders and click the hyperlinked menu buttons
and subfolders contained within them to display menus. Click the D-Link logo to go to the D-
Link website.
Area 2
Presents a graphical near real-time image of the front panel of the Switch. This area displays
the Switch's ports, console and management port, showing port activity.
Some management functions, including save, reboot, download and upload are accessible
here.
Area 3 Presents switch information based on user selection and the entry of configuration data.
NOTE:Any changes made to the Switch configuration during the current session must be saved in the
Save Configuration / Log window or use the command line interface (CLI) command save.
Web Pages
AREA 2
AREA 1
AREA 3

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
7
When connecting to the management mode of the Switch with a web browser, a login screen is displayed. Enter a user
name and password to access the Switch's management mode.
Below is a list of the main folders available in the Web interface:
System Configuration - In this section the user will be able to configure features regarding the Switch’s configuration.
Management - In this section the user will be able to configure features regarding the Switch’s management.
L2 Features - In this section the user will be able to configure features regarding the Layer 2 functionality of the Switch.
L3 Features - In this section the user will be able to configure features regarding the Layer 3 functionality of the Switch.
QoS - In this section the user will be able to configure features regarding the Quality of Service functionality of the
Switch.
ACL - In this section the user will be able to configure features regarding the Access Control List functionality of the
Switch.
Security - In this section the user will be able to configure features regarding the Switch’s security.
Network Application - In this section the user will be able to configure features regarding network applications
handled by the Switch.
OAM - In this section the user will be able to configure features regarding the Switch’s operations, administration and
maintenance (OAM).
Monitoring - In this section the user will be able to monitor the Switch’s configuration and statistics.
NOTE: Be sure to configure the user name and password in the User Accounts menu before
connecting the Switch to the greater network.

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
8
Chapter 2 System Configuration
Device Information
System Information Settings
Port Configuration
PoE
Serial Port Settings
Warning Temperature Settings
System Log configuration
Time Range Settings
Port Group Settings
Time Settings
User Accounts Settings
Command Logging Settings
Stacking
Device Information
This window contains the main settings for all the major functions for the Switch. It appears automatically when you log
on to the Switch. To return to the Device Information window after viewing other windows, click the DGS-3420-28SC
link.
The Device Information window shows the Switch’s MAC Address (assigned by the factory and unchangeable), the
Boot PROM Version, Firmware Version, Hardware Version, and many other important types of information. This is
helpful to keep track of PROM and firmware updates and to obtain the Switch’s MAC address for entry into another
network device’s address table, if necessary. In addition, this window displays the status of functions on the Switch to
quickly assess their current global status.
Many functions are hyper-linked for easy access to enable quick configuration from this window.

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
9
Figure 2-1 Device Information window
Click the Settings link to navigate to the appropriate feature page for configuration.
System Information Settings
The user can enter a System Name, System Location, and System Contact to aid in defining the Switch.
To view the following window, click System Configuration > System Information Settings, as show below:
Figure 2-2 System Information Settings window
The fields that can be configured are described below:
Parameter Description
System Name Enter a system name for the Switch, if so desired. This name will identify it in the Switch
network.