D-Link xStack DGS-3120 Series User manual

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
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Information in this document is subject to change without notice.
© 2014 D-Link Corporation. All rights reserved.
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April, 2014

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Table of Contents
Intended Readers......................................................................................................................................................1
Typographical Conventions.......................................................................................................................................1
Notes, Notices and Cautions.....................................................................................................................................1
Chapter 1 Web-based Switch Configuration......................................................................2
Introduction................................................................................................................................................................2
Login to the Web Manager........................................................................................................................................2
Web-based User Interface ........................................................................................................................................3
Areas of the User Interface....................................................................................................................................3
Web Pages................................................................................................................................................................5
Chapter 2 System Configuration.........................................................................................6
Device Information ....................................................................................................................................................6
System Information Settings.....................................................................................................................................8
Port Configuration .....................................................................................................................................................8
DDM (RI and EI Mode Only)..................................................................................................................................9
Port Settings........................................................................................................................................................15
Port Description Settings.....................................................................................................................................17
Port Error Disabled..............................................................................................................................................18
Port Media Type ..................................................................................................................................................19
Port Auto Negotiation Information .......................................................................................................................20
Jumbo Frame Settings ........................................................................................................................................20
EEE Settings .......................................................................................................................................................21
PoE (DGS-3120-24PC and DGS-3120-48PC Only)...............................................................................................21
PoE System Settings...........................................................................................................................................22
PoE Port Settings ................................................................................................................................................23
Serial Port Settings .................................................................................................................................................25
Warning Temperature Settings ...............................................................................................................................25
Trap Settings...........................................................................................................................................................26
System Log Configuration.......................................................................................................................................26
System Log Settings............................................................................................................................................26
System Log Server Settings................................................................................................................................27
System Log..........................................................................................................................................................28
System Log & Trap Settings................................................................................................................................28
System Severity Settings.....................................................................................................................................29
Time Range Settings...............................................................................................................................................30
Port Group Settings (RI and EI Mode Only)............................................................................................................30
Time Settings ..........................................................................................................................................................31
User Accounts Settings...........................................................................................................................................31
Command Logging Settings....................................................................................................................................32
Configuration Trap Settings ....................................................................................................................................33
Stacking (EI and SI Mode Only)..............................................................................................................................33
Stacking Device Table.........................................................................................................................................35
Stacking Mode Settings.......................................................................................................................................35
Reboot Schedule Settings.......................................................................................................................................36
Turn on LEDs ..........................................................................................................................................................37
Chapter 3 Management......................................................................................................38
ARP.........................................................................................................................................................................38
Static ARP Settings .............................................................................................................................................38

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Proxy ARP Settings (RI and EI Mode Only)........................................................................................................39
ARP Table ...........................................................................................................................................................39
Gratuitous ARP .......................................................................................................................................................40
Gratuitous ARP Global Settings..........................................................................................................................40
Gratuitous ARP Settings......................................................................................................................................40
IPv6 Neighbor Settings ...........................................................................................................................................41
IP Interface..............................................................................................................................................................42
System IP Address Settings................................................................................................................................42
Interface Settings.................................................................................................................................................44
Loopback Interface Settings (RI Mode Only) ......................................................................................................47
Management Settings .............................................................................................................................................48
Session Table..........................................................................................................................................................49
Single IP Management............................................................................................................................................50
Single IP Settings ................................................................................................................................................52
Topology..............................................................................................................................................................52
Firmware Upgrade...............................................................................................................................................58
Configuration File Backup/Restore......................................................................................................................58
Upload Log File ...................................................................................................................................................59
SNMP Settings........................................................................................................................................................59
SNMP Global Settings.........................................................................................................................................60
SNMP Traps Settings..........................................................................................................................................61
SNMP Linkchange Traps Settings ......................................................................................................................61
SNMP View Table Settings .................................................................................................................................62
SNMP Community Table Settings.......................................................................................................................63
SNMP Group Table Settings...............................................................................................................................64
SNMP Engine ID Settings ...................................................................................................................................65
SNMP User Table Settings..................................................................................................................................65
SNMP Host Table Settings..................................................................................................................................66
SNMP v6Host Table Settings..............................................................................................................................67
RMON Settings....................................................................................................................................................68
SNMP Community Encryption Settings...............................................................................................................68
SNMP Community Masking Settings ..................................................................................................................68
Telnet Settings ........................................................................................................................................................69
Web Settings...........................................................................................................................................................69
Power Saving..........................................................................................................................................................70
LED State Settings ..............................................................................................................................................70
Power Saving Settings ........................................................................................................................................70
Power Saving LED Settings ................................................................................................................................71
Power Saving Port Settings.................................................................................................................................72
SD Card Management ............................................................................................................................................72
SD Card Backup Settings....................................................................................................................................72
SD Card Execute Settings...................................................................................................................................73
Chapter 4 L2 Features........................................................................................................74
VLAN.......................................................................................................................................................................74
802.1Q VLAN Settings ........................................................................................................................................79
802.1v Protocol VLAN .........................................................................................................................................82
Asymmetric VLAN Settings .................................................................................................................................84
GVRP...................................................................................................................................................................84
MAC-based VLAN Settings.................................................................................................................................86
Private VLAN Settings.........................................................................................................................................86

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PVID Auto Assign Settings..................................................................................................................................88
VLAN Counter Settings (RI and EI Mode Only) ..................................................................................................88
Voice VLAN .........................................................................................................................................................89
Surveillance VLAN...............................................................................................................................................92
VLAN Trunk Settings...........................................................................................................................................94
Browse VLAN ......................................................................................................................................................95
Show VLAN Ports................................................................................................................................................95
QinQ (RI and EI Mode Only)...................................................................................................................................96
QinQ Settings ......................................................................................................................................................98
VLAN Translation Settings ..................................................................................................................................99
Layer 2 Protocol Tunneling Settings.......................................................................................................................99
Spanning Tree.......................................................................................................................................................100
STP Bridge Global Settings...............................................................................................................................102
STP Port Settings..............................................................................................................................................103
MST Configuration Identification .......................................................................................................................105
STP Instance Settings.......................................................................................................................................106
MSTP Port Information......................................................................................................................................106
Link Aggregation ...................................................................................................................................................107
Port Trunking Settings.......................................................................................................................................108
LACP Port Settings............................................................................................................................................109
FDB.......................................................................................................................................................................110
Static FDB Settings ...........................................................................................................................................110
MAC Notification Settings..................................................................................................................................111
MAC Address Aging Time Settings...................................................................................................................112
MAC Address Table ..........................................................................................................................................113
ARP & FDB Table..............................................................................................................................................114
L2 Multicast Control ..............................................................................................................................................115
IGMP Proxy (RI Mode Only)..............................................................................................................................115
IGMP Snooping .................................................................................................................................................116
MLD Proxy (RI Mode Only) ...............................................................................................................................125
MLD Snooping...................................................................................................................................................127
Multicast VLAN..................................................................................................................................................135
Multicast Filtering ..................................................................................................................................................142
IPv4 Multicast Filtering ......................................................................................................................................142
IPv6 Multicast Filtering ......................................................................................................................................144
Multicast Filtering Mode.....................................................................................................................................146
ERPS Settings (RI and EI Mode Only) .................................................................................................................147
LLDP .....................................................................................................................................................................150
LLDP..................................................................................................................................................................150
LLDP-MED.........................................................................................................................................................159
NLB FDB Settings.................................................................................................................................................162
Chapter 5 L3 Features......................................................................................................163
IPv4 Default Route Settings (SI Mode Only).........................................................................................................163
IPv4 Static/Default Route Settings (RI and EI Mode Only)...................................................................................164
IPv4 Route Table ..................................................................................................................................................165
IPv6 Default Route Settings (SI Mode Only).........................................................................................................166
IPv6 Static/Default Route Settings (RI and EI Mode Only)...................................................................................166
IPv6 Route Table ..................................................................................................................................................167
Policy Route Settings (RI Mode Only) ..................................................................................................................168
IP Forwarding Table..............................................................................................................................................170

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IP Multicast Forwarding Table (RI Mode Only).....................................................................................................171
IP Multicast Interface Table (RI Mode Only).........................................................................................................171
Static Multicast Route Settings (RI Mode Only)....................................................................................................172
Route Preference Settings (RI Mode Only) ..........................................................................................................172
ECMP Algorithm Settings (RI Mode Only)............................................................................................................173
Route Redistribution (RI Mode Only)....................................................................................................................174
Route Redistribution Settings............................................................................................................................174
IPv6 Route Redistribution Settings....................................................................................................................174
IP Tunnel (RI Mode Only) .....................................................................................................................................175
IP Tunnel Settings .............................................................................................................................................175
IP Tunnel GRE Settings ....................................................................................................................................176
OSPF (RI Mode Only)...........................................................................................................................................177
OSPFv2.............................................................................................................................................................197
OSPFv3.............................................................................................................................................................205
RIP (RI Mode Only)...............................................................................................................................................216
RIP Settings.......................................................................................................................................................218
RIPng.................................................................................................................................................................219
IP Multicast Routing Protocol (RI Mode Only) ......................................................................................................221
IGMP..................................................................................................................................................................221
MLD...................................................................................................................................................................224
DVMRP..............................................................................................................................................................227
PIM ....................................................................................................................................................................229
VRRP (RI Mode Only)...........................................................................................................................................247
VRRP Global Settings.......................................................................................................................................247
VRRP Virtual Router Settings............................................................................................................................248
VRRP Authentication Settings...........................................................................................................................249
IP Route Filter (RI Mode Only)..............................................................................................................................250
IP Standard Access List Settings ......................................................................................................................250
Route Map Settings...........................................................................................................................................251
MD5 Settings (RI Mode Only)...............................................................................................................................253
IGMP Static Group Settings (RI Mode Only) ........................................................................................................254
Chapter 6 QoS...................................................................................................................255
802.1p Settings .....................................................................................................................................................256
802.1p Default Priority Settings.........................................................................................................................256
802.1p User Priority Settings.............................................................................................................................257
Bandwidth Control.................................................................................................................................................258
Bandwidth Control Settings...............................................................................................................................258
Queue Bandwidth Control Settings ...................................................................................................................259
Traffic Control Settings..........................................................................................................................................260
DSCP ....................................................................................................................................................................263
DSCP Trust Settings .........................................................................................................................................263
DSCP Map Settings...........................................................................................................................................263
HOL Blocking Prevention......................................................................................................................................265
Scheduling Settings ..............................................................................................................................................265
QoS Scheduling.................................................................................................................................................265
QoS Scheduling Mechanism.............................................................................................................................266
WRED ...................................................................................................................................................................267
WRED Port Settings..........................................................................................................................................267
WRED Profile Settings ......................................................................................................................................268
Chapter 7 ACL...................................................................................................................270

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ACL Configuration Wizard.....................................................................................................................................270
Access Profile List.................................................................................................................................................271
Add an Ethernet ACL Profile .............................................................................................................................272
Adding an IPv4 ACL Profile...............................................................................................................................275
Adding an IPv6 ACL Profile...............................................................................................................................279
Adding a Packet Content ACL Profile ...............................................................................................................283
CPU Access Profile List........................................................................................................................................287
Adding a CPU Ethernet ACL Profile..................................................................................................................288
Adding a CPU IPv4 ACL Profile ........................................................................................................................291
Adding a CPU IPv6 ACL Profile ........................................................................................................................295
Adding a CPU Packet Content ACL Profile.......................................................................................................298
ACL Finder............................................................................................................................................................301
ACL Flow Meter.....................................................................................................................................................301
Egress Access Profile List (RI and EI Mode Only)................................................................................................304
Add an Ethernet ACL Profile .............................................................................................................................305
Adding an IPv4 ACL Profile...............................................................................................................................309
Adding an IPv6 ACL Profile...............................................................................................................................313
Egress ACL Flow Meter (RI and EI Mode Only) ...................................................................................................316
Chapter 8 Security............................................................................................................319
802.1X...................................................................................................................................................................319
802.1X Global Settings......................................................................................................................................322
802.1X Port Settings..........................................................................................................................................323
802.1X User Settings.........................................................................................................................................324
Guest VLAN Settings.........................................................................................................................................325
Authenticator State............................................................................................................................................326
Authenticator Statistics......................................................................................................................................326
Authenticator Session Statistics........................................................................................................................327
Authenticator Diagnostics..................................................................................................................................328
Initialize Port-based Port(s)...............................................................................................................................329
Initialize Host-based Port(s) ..............................................................................................................................330
Reauthenticate Port-based Port(s)....................................................................................................................330
Reauthenticate Host-based Port(s)...................................................................................................................331
RADIUS.................................................................................................................................................................331
Authentication RADIUS Server Settings ...........................................................................................................331
RADIUS Authentication.....................................................................................................................................332
RADIUS Account Client.....................................................................................................................................334
IP-MAC-Port Binding (IMPB) (RI and EI Mode Only) ...........................................................................................335
IMPB Global Settings ........................................................................................................................................335
IMPB Port Settings ............................................................................................................................................336
IMPB Entry Settings ..........................................................................................................................................338
MAC Block List ..................................................................................................................................................338
DHCP Snooping ................................................................................................................................................339
ND Snooping.....................................................................................................................................................341
MAC-based Access Control (MAC).......................................................................................................................343
MAC-based Access Control Settings ................................................................................................................343
MAC-based Access Control Port Settings.........................................................................................................344
MAC-based Access Control Local Settings.......................................................................................................345
MAC-based Access Control Authentication State.............................................................................................346
Web-based Access Control (WAC).......................................................................................................................347
WAC Global Settings.........................................................................................................................................349

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WAC User Settings............................................................................................................................................350
WAC Port Settings.............................................................................................................................................350
WAC Authentication State.................................................................................................................................351
WAC Customize Page.......................................................................................................................................352
Japanese Web-based Access Control (JWAC)....................................................................................................353
JWAC Global Settings.......................................................................................................................................353
JWAC Port Settings...........................................................................................................................................355
JWAC User Settings..........................................................................................................................................356
JWAC Authentication State...............................................................................................................................357
JWAC Customize Page Language....................................................................................................................358
JWAC Customize Page.....................................................................................................................................358
Compound Authentication.....................................................................................................................................360
Compound Authentication Settings...................................................................................................................360
Compound Authentication Guest VLAN Settings (RI and EI Mode Only).........................................................362
Compound Authentication MAC Format Settings (RI and EI Mode Only) ........................................................363
IGMP Access Control Settings..............................................................................................................................364
Port Security..........................................................................................................................................................365
Port Security Settings........................................................................................................................................365
Port Security VLAN Settings .............................................................................................................................366
Port Security Entries..........................................................................................................................................367
ARP Spoofing Prevention Settings .......................................................................................................................368
BPDU Attack Protection........................................................................................................................................368
Loopback Detection Settings ................................................................................................................................370
RPC PortMapper Filter Settings............................................................................................................................371
NetBIOS Filtering Settings ....................................................................................................................................371
Traffic Segmentation Settings...............................................................................................................................372
DHCP Server Screening .......................................................................................................................................373
DHCP Server Screening Port Settings..............................................................................................................373
DHCP Offer Permit Entry Settings ....................................................................................................................374
Filter DHCPv6 Server........................................................................................................................................375
Filter ICMPv6.....................................................................................................................................................376
Access Authentication Control..............................................................................................................................376
Enable Admin ....................................................................................................................................................377
Authentication Policy Settings...........................................................................................................................378
Application Authentication Settings...................................................................................................................379
Accounting Settings...........................................................................................................................................379
Authentication Server Group Settings...............................................................................................................380
Authentication Server Settings..........................................................................................................................382
Login Method Lists Settings ..............................................................................................................................383
Enable Method Lists Settings............................................................................................................................384
Accounting Method Lists Settings .....................................................................................................................385
Local Enable Password Settings.......................................................................................................................385
SSL........................................................................................................................................................................386
SSL Settings......................................................................................................................................................387
SSL Certification Settings..................................................................................................................................388
SSH.......................................................................................................................................................................389
SSH Settings .....................................................................................................................................................390
SSH Authentication Method and Algorithm Settings.........................................................................................391
SSH User Authentication List............................................................................................................................392
DoS Attack Prevention Settings............................................................................................................................393

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Trusted Host Settings............................................................................................................................................394
Safeguard Engine Settings ...................................................................................................................................395
SFTP Server Settings ...........................................................................................................................................397
Chapter 9 Network Application .......................................................................................399
DHCP....................................................................................................................................................................399
DHCP Relay ......................................................................................................................................................399
DHCP Server (RI Mode Only) ...........................................................................................................................407
DHCPv6 Relay ..................................................................................................................................................411
DHCP Local Relay Settings...............................................................................................................................413
DHCPv6 Local Relay Settings...........................................................................................................................414
DNS Resolver........................................................................................................................................................414
DNS Resolver Global Settings ..........................................................................................................................414
DNS Resolver Static Name Server Settings .....................................................................................................415
DNS Resolver Dynamic Name Server Table ....................................................................................................415
DNS Resolver Static Host Name Settings.........................................................................................................415
DNS Resolver Dynamic Host Name Table........................................................................................................416
PPPoE Circuit ID Insertion Settings (RI and EI Mode Only).................................................................................416
SMTP Settings ......................................................................................................................................................417
SNTP.....................................................................................................................................................................418
SNTP Settings...................................................................................................................................................419
Time Zone Settings ...........................................................................................................................................419
UDP.......................................................................................................................................................................421
UDP Helper .......................................................................................................................................................421
Flash File System Settings....................................................................................................................................422
Chapter 10 OAM..................................................................................................................425
CFM (RI and EI Mode Only)..................................................................................................................................425
CFM Settings.....................................................................................................................................................425
CFM Port Settings .............................................................................................................................................431
CFM MIPCCM Table .........................................................................................................................................431
CFM Loopback Settings....................................................................................................................................432
CFM Linktrace Settings.....................................................................................................................................432
CFM Packet Counter.........................................................................................................................................433
CFM Fault Table................................................................................................................................................434
CFM MP Table ..................................................................................................................................................435
Ethernet OAM (RI and EI Mode Only) ..................................................................................................................435
Ethernet OAM Settings......................................................................................................................................435
Ethernet OAM Configuration Settings...............................................................................................................436
Ethernet OAM Event Log...................................................................................................................................437
Ethernet OAM Statistics ....................................................................................................................................438
DULD Settings (RI and EI Mode Only) .................................................................................................................439
Cable Diagnostics .................................................................................................................................................440
Chapter 11Monitoring .......................................................................................................442
Utilization...............................................................................................................................................................442
CPU Utilization ..................................................................................................................................................442
DRAM & Flash Utilization..................................................................................................................................442
Port Utilization ...................................................................................................................................................443
Statistics................................................................................................................................................................444
Port Statistics.....................................................................................................................................................444
Packet Size........................................................................................................................................................452
VLAN Counter Statistics (RI and EI Mode Only)...............................................................................................453

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Mirror.....................................................................................................................................................................454
Port Mirror Settings............................................................................................................................................454
RSPAN Settings ................................................................................................................................................455
sFlow (RI and EI Mode Only)................................................................................................................................456
sFlow Global Settings........................................................................................................................................456
sFlow Analyzer Server Settings ........................................................................................................................456
sFlow Flow Sampler Settings............................................................................................................................457
sFlow Counter Poller Settings...........................................................................................................................458
Ping Test...............................................................................................................................................................459
Trace Route...........................................................................................................................................................460
Peripheral..............................................................................................................................................................461
Device Environment ..........................................................................................................................................461
Chapter 12 Save and Tools................................................................................................463
Save Configuration / Log.......................................................................................................................................463
License Management............................................................................................................................................463
Stacking Information (EI and SI Mode Only).........................................................................................................464
Download Firmware ..............................................................................................................................................465
From TFTP........................................................................................................................................................465
From HTTP........................................................................................................................................................466
Upload Firmware...................................................................................................................................................466
To TFTP.............................................................................................................................................................466
To HTTP............................................................................................................................................................467
Download Configuration........................................................................................................................................467
From TFTP ........................................................................................................................................................467
From HTTP........................................................................................................................................................468
Upload Configuration ............................................................................................................................................468
To TFTP.............................................................................................................................................................468
To HTTP............................................................................................................................................................469
Upload Log File.....................................................................................................................................................470
To TFTP.............................................................................................................................................................470
To HTTP............................................................................................................................................................470
Reset.....................................................................................................................................................................471
Reboot System......................................................................................................................................................471
Appendix Section...................................................................................................................473
Appendix A Password Recovery Procedure ....................................................................................................473
Appendix B System Log Entries.......................................................................................................................475
Appendix C Trap Log Entries ...........................................................................................................................487
Appendix D RADIUS Attributes Assignment....................................................................................................495
Appendix E IETF RADIUS Attributes Support..................................................................................................498

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Intended Readers
Typographical Conventions
Notes, Notices and Cautions
The DGS-3120 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.

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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-3120 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 is 10.90.90.90.
This opens the management module's user authentication window, 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.

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When the Switches with different modes or firmware versions are stacked together, the following window appears.
Figure 1-2 Mixed Stacking message
Click OK to continue.
Web-based User Interface
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.

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Figure 1-3 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.
AREA 2
AREA 1
AREA 3

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Web Pages
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.

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Chapter 2 System Configuration
Device Information
System Information Settings
Port Configuration
PoE
Serial Port Settings
Warning Temperature Settings
Trap Settings
System Log Configuration
Time Range Settings
Port Group Settings (RI and EI Mode Only)
Time Settings
User Accounts Settings
Command Logging Settings
Configuration Trap Settings
Stacking (EI and SI Mode Only)
Reboot Schedule Settings
Turn on LEDs
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-3120
Series 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.

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Figure 2-1 Device Information window (RI Mode Only)
Figure 2-2 Device Information window (EI Mode Only)

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Figure 2-3 Device Information window (SI Mode Only)
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 shown below:
Figure 2-4 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.
System Location
Enter the location of the Switch, if so desired.
System Contact
Enter a contact name for the Switch, if so desired.
Click the Apply button to implement changes made.
Port Configuration

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DDM (RI and EI Mode Only)
This folder contains windows that perform Digital Diagnostic Monitoring (DDM) functions on the Switch. There are
windows that allow the user to view the digital diagnostic monitoring status of SFP modules inserting to the Switch
and to configure alarm settings, warning settings, temperature threshold settings, voltage threshold settings, bias
current threshold settings, TX power threshold settings, and Rx power threshold settings.
DDM Settings
The window is used to configure the action that will occur for specific ports when an exceeding alarm threshold or
warning threshold event is encountered.
To view the following window, click System Configuration > Port Configuration > DDM > DDM Settings, as
shown below:
Figure 2-5 DDM Settings window
The fields that can be configured are described below:
Parameter Description
Trap State Specify whether to send the trap, when the operating parameter exceeds the alarm or
warning threshold.
Log State Specify whether to send the log, when the operating parameter exceeds the alarm or
warning threshold.
Unit
Select the unit to be configured. (EI Mode Only)
From Port / To Port
Select a range of ports to be configured.
State
Use the drop-down menu to enable or disable the DDM state

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
10
Shutdown Specifies whether to shutdown the port, when the operating parameter exceeds the
Alarm or Warning threshold.
Click the Apply button to accept the changes made for each individual section.
Click the Reload Threshold button to reset the threshold configuration to default.
DDM Temperature Threshold Settings
This window is used to configure the DDM Temperature Threshold Settings for specific ports on the Switch.
To view the following window, click System Configuration > Port Configuration > DDM > DDM Temperature
Threshold Settings, as shown below:
Figure 2-6 DDM Temperature Threshold Settings window
The fields that can be configured are described below:
Parameter Description
Unit
Select the unit to be configured. (EI Mode Only)
From Port / To Port
Select a range of ports to be configured.
High Alarm (-128-
127.996)
This is the highest threshold for the alarm. When the operating parameter rises above
this value, action associated with the alarm will be taken.
Low Alarm (-128-
127.996)
This is the lowest threshold for the alarm. When the operating parameter falls below this
value, action associated with the alarm will be taken.
High Warning (-
128-127.996)
This is the highest threshold for the warning. When the operating parameter rises above
this value, action associated with the warning will be taken.
Low Warning (-
This is the lowest threshold for the warning. When the operating parameter falls below