AMX NXA-ENET24 User manual

instruction manual
Control System Accessories
NXA-ENET24
24-Port Fast Ethernet Switch
Software Management Guide

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Table of Contents
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XA-ENET Software Management Guide
Table of Contents
Introduction ...............................................................................................................1
Key Features .................................................................................................................. 1
Description of Software Features ...................................................................................... 2
System Defaults ................................................................................................................ 5
Initial Configuration ..................................................................................................9
Connecting to the Switch................................................................................................... 9
Configuration Options .............................................................................................................. 9
Required Connections............................................................................................................ 10
Remote Connections.............................................................................................................. 11
Basic Configuration ......................................................................................................... 11
Console Connection............................................................................................................... 11
Setting Passwords ............................................................................................................... 12
Setting an IP Address ............................................................................................................ 12
Enabling SNMP Management Access ................................................................................... 14
Saving Configuration Settings................................................................................................ 15
Managing System Files ................................................................................................... 16
Configuring Power over Ethernet .................................................................................... 17
Configuring the Switch ..........................................................................................19
Using the Web Interface.................................................................................................. 19
Navigating the Web Browser Interface............................................................................ 20
Home Page ............................................................................................................................ 20
Configuration Options ............................................................................................................ 20
Panel Display ......................................................................................................................... 21
Main Menu ............................................................................................................................. 22
Basic Configuration ......................................................................................................... 26
Displaying System Information............................................................................................... 26
Displaying Switch Hardware/Software Versions ................................................................... 29
Displaying Bridge Extension Capabilities............................................................................... 30
Setting the IP Address .......................................................................................................... 31
Managing Firmware ............................................................................................................... 34
Saving or Restoring Configuration Settings ........................................................................... 36
Console Port Settings ............................................................................................................ 39
Telnet Settings ....................................................................................................................... 40
Configuring Event Logging..................................................................................................... 42
Resetting the System ............................................................................................................. 48
Setting the System Clock ...................................................................................................... 48

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Configuring SNMP .......................................................................................................... 50
Enabling SNMP...................................................................................................................... 51
Setting Community Access Strings ....................................................................................... 52
Specifying Trap Managers .................................................................................................... 53
Configuring SNMPv3 Management Access ........................................................................... 54
User Authentication......................................................................................................... 60
Configuring User Accounts .................................................................................................... 60
Configuring Local/Remote Logon Authentication................................................................... 61
Configuring HTTPS ................................................................................................................ 64
Configuring the Secure Shell ................................................................................................ 66
Configuring Port Security ....................................................................................................... 71
Configuring 802.1x Port Authentication ................................................................................. 72
Filtering Addresses for SNMP Client Access ......................................................................... 78
Access Control Lists........................................................................................................ 79
Configuring Access Control Lists ........................................................................................... 79
Configuring ACL Masks ......................................................................................................... 85
Binding a Port to an Access Control List................................................................................ 89
Filtering IP Addresses for Management Access ............................................................. 90
Port Configuration ........................................................................................................... 92
Displaying Connection Status ................................................................................................ 92
Configuring Interface Connections......................................................................................... 94
Creating Trunk Groups........................................................................................................... 96
Setting Broadcast Storm Thresholds ................................................................................... 107
Configuring Port Mirroring .................................................................................................... 108
Configuring Rate Limits........................................................................................................ 109
Showing Port Statistics ........................................................................................................ 110
Power Over Ethernet Settings....................................................................................... 114
Switch Power Status ............................................................................................................ 114
Setting a Switch Power Budget............................................................................................ 115
Displaying Port Power status ............................................................................................... 115
Configuring Port PoE Power ................................................................................................ 116
Address Table Settings ................................................................................................. 117
Setting Static Addresses ...................................................................................................... 117
Displaying the Address Table .............................................................................................. 118
Changing the Aging Time..................................................................................................... 119
Spanning Tree Algorithm Configuration ........................................................................ 120
Displaying Global Settings ................................................................................................... 120
Configuring Global Settings ................................................................................................. 123
Displaying Interface Settings ............................................................................................... 126
Configuring Interface Settings ............................................................................................. 128

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XA-ENET Software Management Guide
VLAN Configuration....................................................................................................... 131
Overview .............................................................................................................................. 131
Enabling or Disabling GVRP (Global Setting) ..................................................................... 133
Displaying Basic VLAN Information ..................................................................................... 134
Displaying Current VLANs ................................................................................................... 134
Creating VLANs ................................................................................................................... 136
Adding Static Members to VLANs (VLAN Index) ................................................................. 137
Adding Static Members to VLANs (Port Index) .................................................................... 138
Configuring VLAN Behavior for Interfaces ........................................................................... 139
Private VLANs ............................................................................................................... 141
Displaying Current Private VLANs ....................................................................................... 142
Configuring Private VLANs ................................................................................................. 143
Associating Community VLANs ........................................................................................... 143
Displaying Private VLAN Interface Information .................................................................... 144
Configuring Private VLAN Interfaces ................................................................................... 145
Class of Service Configuration ..................................................................................... 146
Setting the Default Priority for Interfaces ............................................................................. 147
Mapping CoS Values to Egress Queues.............................................................................. 148
Traffic Classes Status .......................................................................................................... 149
Selecting the Queue Mode................................................................................................... 150
Setting the Service Weight for Traffic Classes..................................................................... 150
Mapping Layer 3/4 Priorities to CoS Values ........................................................................ 151
Selecting IP Precedence/DSCP Priority............................................................................... 152
Mapping IP Precedence....................................................................................................... 152
Mapping DSCP Priority ........................................................................................................ 153
Mapping IP Port Priority ....................................................................................................... 155
Copy Settings....................................................................................................................... 156
Mapping CoS Values to ACLs.............................................................................................. 157
Changing Priorities Based on ACL Rules ............................................................................ 159
Multicast Filtering ......................................................................................................... 160
Configuring IGMP Snooping and Query Parameters ........................................................... 161
Displaying Interfaces Attached to a Multicast Router........................................................... 162
Specifying Interfaces Attached to a Multicast Router........................................................... 163
Displaying Port Members of Multicast Services ................................................................... 164
Assigning Ports to Multicast Services .................................................................................. 165
Configuring Domain Name Service ............................................................................... 166
Configuring General DNS Server Parameters .................................................................... 166
Configuring Static DNS Host to Address Entries ................................................................. 168
Displaying the DNS Cache................................................................................................... 169
......................................................................................Command Line Interface 171

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Using the Command Line Interface............................................................................... 171
Accessing the CLI ................................................................................................................ 171
Console Connection............................................................................................................. 171
Telnet Connection ................................................................................................................ 172
Entering Commands ..................................................................................................... 173
Keywords and Arguments .................................................................................................... 173
Minimum Abbreviation.......................................................................................................... 173
Command Completion ......................................................................................................... 173
Getting Help on Commands................................................................................................. 173
Partial Keyword Lookup ....................................................................................................... 175
Negating the Effect of Commands ....................................................................................... 175
Using Command History ...................................................................................................... 175
Understanding Command Modes ........................................................................................ 175
Exec Commands.................................................................................................................. 176
Configuration Commands .................................................................................................... 176
Command Line Processing .................................................................................................. 177
Command Groups......................................................................................................... 178
Line Commands ............................................................................................................ 179
line........................................................................................................................................ 180
login...................................................................................................................................... 180
password.............................................................................................................................. 181
timeout login response ......................................................................................................... 182
exec-timeout......................................................................................................................... 183
password-thresh................................................................................................................... 183
silent-time............................................................................................................................. 184
databits................................................................................................................................. 185
parity .................................................................................................................................... 185
speed ................................................................................................................................... 186
stopbits................................................................................................................................. 187
disconnect ............................................................................................................................ 187
show line .............................................................................................................................. 188
General Commands .................................................................................................. 189
enable .................................................................................................................................. 189
disable.................................................................................................................................. 190
configure .............................................................................................................................. 190
show history ......................................................................................................................... 191
reload ................................................................................................................................... 192
end ....................................................................................................................................... 192
exit........................................................................................................................................ 193
quit ....................................................................................................................................... 193

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System Management Commands ................................................................................. 194
Device Designation Commands ................................................................................. 194
prompt .................................................................................................................................. 194
hostname ............................................................................................................................. 195
User Access Commands............................................................................................... 195
username ............................................................................................................................. 196
enable password .................................................................................................................. 197
IP Filter Commands .................................................................................................... 198
management ........................................................................................................................ 198
show management............................................................................................................... 199
Web Server Commands ............................................................................................. 200
ip http port ............................................................................................................................ 200
ip http server ........................................................................................................................ 201
ip http secure-server ............................................................................................................ 201
ip http secure-port ................................................................................................................ 202
Telnet Server Commands .......................................................................................... 203
ip telnet port ......................................................................................................................... 203
ip telnet server...................................................................................................................... 203
Secure Shell Commands .............................................................................................. 204
ip ssh server......................................................................................................................... 206
ip ssh timeout ....................................................................................................................... 206
ip ssh authentication-retries ................................................................................................. 207
ip ssh server-key size........................................................................................................... 208
delete public-key .................................................................................................................. 208
ip ssh crypto host-key generate ........................................................................................... 209
ip ssh crypto zeroize ............................................................................................................ 209
ip ssh save host-key............................................................................................................. 210
show ip ssh .......................................................................................................................... 210
show ssh .............................................................................................................................. 211
show public-key.................................................................................................................... 212
Event Logging Commands ........................................................................................ 213
logging on............................................................................................................................. 213
logging history ...................................................................................................................... 214
logging host.......................................................................................................................... 215
logging facility....................................................................................................................... 215
logging trap .......................................................................................................................... 216
clear log................................................................................................................................ 216
show logging ........................................................................................................................ 217
SMTP Alert Commands................................................................................................. 219
logging sendmail host .......................................................................................................... 219

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logging sendmail level.......................................................................................................... 220
logging sendmail source-email............................................................................................. 220
logging sendmail destination-email ...................................................................................... 221
logging sendmail .................................................................................................................. 221
show logging sendmail......................................................................................................... 221
Time Commands .......................................................................................................... 222
sntp client ............................................................................................................................. 222
sntp server ........................................................................................................................... 223
sntp poll................................................................................................................................ 224
show sntp ............................................................................................................................. 224
clock timezone ..................................................................................................................... 225
calendar set.......................................................................................................................... 225
show calendar ...................................................................................................................... 226
System Status Commands ......................................................................................... 227
show startup-config .............................................................................................................. 227
show running-config ............................................................................................................. 228
show system ........................................................................................................................ 230
show users ........................................................................................................................... 230
show version ........................................................................................................................ 231
light unit................................................................................................................................ 232
Flash/File Commands ................................................................................................... 233
copy ..................................................................................................................................... 233
delete ................................................................................................................................... 236
dir ......................................................................................................................................... 237
whichboot ............................................................................................................................. 238
boot system.......................................................................................................................... 238
Power over Ethernet Commands .................................................................................. 239
power mainpower maximum allocation ................................................................................ 239
power inline .......................................................................................................................... 240
power inline maximum allocation ......................................................................................... 241
power inline priority .............................................................................................................. 241
show power inline status ...................................................................................................... 242
show power mainpower ....................................................................................................... 243
Authentication Commands ............................................................................................ 244
Authentication Sequence .................................................................................................. 244
authentication login .............................................................................................................. 244
authentication enable ........................................................................................................... 245
RADIUS Client ............................................................................................................. 246
radius-server host ................................................................................................................ 246
radius-server port ................................................................................................................. 247

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XA-ENET Software Management Guide
radius-server key.................................................................................................................. 248
radius-server retransmit ....................................................................................................... 248
radius-server timeout ........................................................................................................... 248
show radius-server............................................................................................................... 249
TACACS+ Client .......................................................................................................... 249
tacacs-server host................................................................................................................ 250
tacacs-server port ................................................................................................................ 250
tacacs-server key ................................................................................................................. 251
show tacacs-server .............................................................................................................. 251
Port Security Commands .............................................................................................. 252
port security.......................................................................................................................... 252
802.1x Port Authentication ........................................................................................... 254
dot1x system-auth-control.................................................................................................... 254
dot1x default......................................................................................................................... 255
dot1x max-req ...................................................................................................................... 255
dot1x port-control ................................................................................................................. 256
dot1x operation-mode .......................................................................................................... 256
dot1x re-authenticate ........................................................................................................... 257
dot1x re-authentication......................................................................................................... 257
dot1x timeout quiet-period.................................................................................................... 258
dot1x timeout re-authperiod ................................................................................................. 258
dot1x timeout tx-period......................................................................................................... 259
show dot1x ........................................................................................................................... 259
Access Control List Commands .................................................................................... 262
Access Control Lists............................................................................................................. 262
Masks for Access Control Lists ............................................................................................ 263
IP ACLs ............................................................................................................................ 264
access-list ip......................................................................................................................... 264
permit, deny (Standard ACL) .............................................................................................. 265
permit, deny (Extended ACL) .............................................................................................. 266
show ip access-list ............................................................................................................... 268
access-list ip mask-precedence ........................................................................................... 269
mask (IP ACL)...................................................................................................................... 269
show access-list ip mask-precedence.................................................................................. 272
ip access-group.................................................................................................................... 273
show ip access-group .......................................................................................................... 273
map access-list ip................................................................................................................. 274
show map access-list ip ....................................................................................................... 275
match access-list ip.............................................................................................................. 275
show marking ....................................................................................................................... 276

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MAC ACLs ................................................................................................................ 277
access-list mac .................................................................................................................... 277
permit, deny (MAC ACL) ...................................................................................................... 278
show mac access-list .......................................................................................................... 280
access-list mac mask-precedence ....................................................................................... 280
mask (MAC ACL) ................................................................................................................. 281
show access-list mac mask-precedence.............................................................................. 283
permit offset, deny offset (MAC ACL) .................................................................................. 283
mac access-group................................................................................................................ 284
show mac access-group ...................................................................................................... 285
map access-list mac............................................................................................................. 285
show map access-list mac ................................................................................................... 286
match access-list mac.......................................................................................................... 286
ACL Information ........................................................................................................ 287
show access-list ................................................................................................................... 287
show access-group .............................................................................................................. 288
SNMP Commands ........................................................................................................ 288
snmp-server community....................................................................................................... 289
snmp-server contact............................................................................................................. 289
snmp-server location............................................................................................................ 290
snmp-server host ................................................................................................................. 290
snmp-server enable traps .................................................................................................... 291
show snmp ........................................................................................................................... 292
snmp-server ......................................................................................................................... 293
snmp-server engine-id ......................................................................................................... 294
show snmp engine-id ........................................................................................................... 294
snmp-server view ................................................................................................................. 295
show snmp view................................................................................................................... 296
snmp-server group ............................................................................................................... 296
show snmp group................................................................................................................. 297
snmp-server user ................................................................................................................. 298
show snmp user ................................................................................................................... 299
Interface Commands..................................................................................................... 300
interface ............................................................................................................................... 300
description............................................................................................................................ 301
speed-duplex........................................................................................................................ 301
negotiation............................................................................................................................ 302
capabilities ........................................................................................................................... 303
flowcontrol ............................................................................................................................ 304
shutdown.............................................................................................................................. 305

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switchport broadcast packet-rate ......................................................................................... 305
clear counters....................................................................................................................... 306
show interfaces status.......................................................................................................... 307
show interfaces counters ..................................................................................................... 308
show interfaces switchport ................................................................................................... 309
Mirror Port Commands .................................................................................................. 311
port monitor .......................................................................................................................... 311
show port monitor................................................................................................................. 312
Rate Limit Commands................................................................................................... 313
rate-limit ............................................................................................................................... 313
Link Aggregation Commands ........................................................................................ 314
channel-group ..................................................................................................................... 315
lacp....................................................................................................................................... 315
lacp system-priority .............................................................................................................. 317
lacp admin-key (Ethernet Interface) ..................................................................................... 318
lacp admin-key (Port Channel)............................................................................................. 318
lacp port-priority ................................................................................................................... 319
show lacp ............................................................................................................................. 320
Address Table Commands............................................................................................ 323
mac-address-table static ...................................................................................................... 323
clear mac-address-table dynamic ........................................................................................ 324
show mac-address-table ...................................................................................................... 324
mac-address-table aging-time.............................................................................................. 325
show mac-address-table aging-time .................................................................................... 326
Spanning Tree Commands ........................................................................................... 326
spanning-tree ....................................................................................................................... 326
spanning-tree mode ............................................................................................................. 327
spanning-tree forward-time .................................................................................................. 328
spanning-tree hello-time....................................................................................................... 328
spanning-tree max-age ........................................................................................................ 329
spanning-tree priority ........................................................................................................... 329
spanning-tree pathcost method............................................................................................ 330
spanning-tree transmission-limit .......................................................................................... 331
spanning-tree spanning-disabled ......................................................................................... 331
spanning-tree cost ............................................................................................................... 332
spanning-tree port-priority ................................................................................................... 333
spanning-tree edge-port ...................................................................................................... 333
spanning-tree portfast .......................................................................................................... 334
spanning-tree link-type......................................................................................................... 335
spanning-tree protocol-migration ......................................................................................... 335

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show spanning-tree.............................................................................................................. 336
VLAN Commands ......................................................................................................... 338
Editing VLAN Groups ..................................................................................................... 338
vlan database....................................................................................................................... 338
vlan....................................................................................................................................... 339
Configuring VLAN Interfaces ..................................................................................... 340
interface vlan........................................................................................................................ 340
switchport mode .................................................................................................................. 341
switchport acceptable-frame-types ...................................................................................... 341
switchport ingress-filtering.................................................................................................... 342
switchport native vlan........................................................................................................... 343
switchport allowed vlan ........................................................................................................ 343
switchport forbidden vlan ..................................................................................................... 344
Displaying VLAN Information .................................................................................... 345
show vlan ............................................................................................................................. 345
Configuring Private VLANs ........................................................................................... 346
private-vlan........................................................................................................................... 347
private-vlan association........................................................................................................ 347
switchport mode private-vlan ............................................................................................... 348
switchport private-vlan host-association .............................................................................. 349
switchport private-vlan mapping........................................................................................... 349
show vlan private-vlan.......................................................................................................... 350
GVRP and Bridge Extension Commands ..................................................................... 351
bridge-ext gvrp ..................................................................................................................... 351
show bridge-ext.................................................................................................................... 351
switchport gvrp ..................................................................................................................... 352
show gvrp configuration ....................................................................................................... 352
garp timer ............................................................................................................................. 353
show garp timer.................................................................................................................... 354
Priority Commands........................................................................................................ 355
Priority Commands (Layer 2) ......................................................................................... 355
queue mode ......................................................................................................................... 355
switchport priority default .................................................................................................... 356
queue bandwidth.................................................................................................................. 357
queue cos-map .................................................................................................................... 357
show queue bandwidth ........................................................................................................ 358
show queue cos-map ........................................................................................................... 359
Priority Commands (Layer 3 and 4) ................................................................................ 359
map ip port (Global Configuration) ....................................................................................... 360
map ip port (Interface Configuration) ................................................................................... 360

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map ip precedence (Global Configuration) ......................................................................... 361
map ip precedence (Interface Configuration)....................................................................... 361
map ip dscp (Global Configuration)...................................................................................... 362
map ip dscp (Interface Configuration) .................................................................................. 362
show map ip port.................................................................................................................. 363
show map ip precedence ..................................................................................................... 364
show map ip dscp ................................................................................................................ 365
Multicast Filtering Commands ...................................................................................... 366
IGMP Snooping Commands ........................................................................................... 366
ip igmp snooping .................................................................................................................. 366
ip igmp snooping vlan static ................................................................................................. 367
ip igmp snooping version ..................................................................................................... 368
show ip igmp snooping......................................................................................................... 368
show mac-address-table multicast....................................................................................... 369
IGMP Query Commands (Layer 2) ................................................................................ 370
ip igmp snooping querier...................................................................................................... 370
ip igmp snooping query-count .............................................................................................. 370
ip igmp snooping query-interval ........................................................................................... 371
ip igmp snooping query-max-response-time ........................................................................ 371
ip igmp snooping router-port-expire-time ............................................................................. 372
Static Multicast Routing Commands ................................................................................. 373
ip igmp snooping vlan mrouter ............................................................................................. 373
show ip igmp snooping mrouter ........................................................................................... 374
IP Interface Commands................................................................................................. 374
ip address ............................................................................................................................ 375
ip default-gateway ................................................................................................................ 376
ip dhcp restart ...................................................................................................................... 376
show ip interface .................................................................................................................. 377
show ip redirects .................................................................................................................. 377
ping ...................................................................................................................................... 378
DNS Commands ........................................................................................................... 379
ip host................................................................................................................................... 379
clear host.............................................................................................................................. 380
ip domain-name ................................................................................................................... 380
ip domain-list ........................................................................................................................ 381
ip name-server ..................................................................................................................... 382
ip domain-lookup.................................................................................................................. 383
show hosts ........................................................................................................................... 384
show dns .............................................................................................................................. 384
show dns cache ................................................................................................................... 384

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clear dns cache .................................................................................................................... 385
Software Specifications ....................................................................................387
Troubleshooting ..............................................................................................391
Glossary ................................................................................................................ 393

Introduction
1
NXA-ENET Software Management Guide
Introduction
The NXA-ENET24 Fast Ethernet switch is specifically designed to protect the video streams
coming from AMX’s MAX units to the Audio Video Modules (AVM). Standard switches will
reduce bandwidth from all applications when there is heavy data traffic passing through the switch.
For streaming audio and video applications this will cause skipping and jitter in the audio and video
feeds. This is unacceptable for AMX’s applications. As a result, AMX has designed the NXA-
ENET24 to protect the A/V streams when heavy data traffic occurs. Bandwidth is reduced from
other applications such as file transfer, e-mail and web surfing only when during heavy data traffic
events.
The NXA-ENET24 also provides a full range of features for Layer 2 switching. It includes a
management agent that allows you to configure the features listed in this manual. The default
configuration can be used for most of the features provided by this switch. However, there are
many options that you should configure to maximize the switch’s performance for your particular
network environment.
The NXA-ENET24 PoE’s 24 10/100 Mbps ports support the IEEE 802.3af Power-over-Ethernet
(PoE) standard that enables DC power to be supplied to attached devices over the unused pairs of
wires in the connecting Ethernet cable.

Introduction
2NXA-ENET Software Management Guide
Key Features
Key Features
Feature Description
Power over Ethernet Powers attached devices using IEEE 802.3af Power over Ethernet (PoE)
Configuration Backup and
Restore
Backup to TFTP server
Authentication Console, Telnet – User name / password, RADIUS, TACACS+
Telnet – SSH
SNMP – Community strings, IP address filtering
Port – IEEE 802.1x, MAC address filtering
Access Control Lists Supports up to 32 IP or MAC ACLs
Access Control Lists Supports up to 32 IP or MAC ACLs
DHCP Client, Relay and
Server
Supported
DNS Server Supported
Port Configuration Speed, duplex mode and flow control
Rate Limiting Input and output rate limiting per port
Port Mirroring One or more ports mirrored to single analysis port
Port Trunking Supports port trunking using either static or dynamic trunking (LACP)
Broadcast Storm Control Supported
Static Address Up to 8K MAC addresses in the forwarding table, 128 static entries in ARP
cache
IEEE 802.1D Bridge Supports dynamic data switching and addresslearning
Store-and-Forward Switching Supported to ensure wire-speed switching while eliminating bad frames
Spanning Tree Protocol Supports standard STP and Rapid Spanning Tree Protocol (RSTP)
Virtual LANs Up to 255 using IEEE 802.1Q, port-based, or private VLANs
Traffic Prioritization Default port priority, traffic class map, queue scheduling,
IP Precedence, or Differentiated Services Code Point (DSCP), and TCP/UDP
Port
IP Routing Routing Information Protocol (RIP), Open Shortest Path First (OSPF), static
routes
ARP Static and dynamic address configuration, proxy ARP
Multicast Filtering Supports IGMP snooping and query for Layer 2, and IGMP for Layer 3
Multicast Routing Supports DVMRP and PIM-DM

Introduction
3
NXA-ENET Software Management Guide
Description of Software Features
The switch provides a wide range of advanced performance enhancing features. Flow control
eliminates the loss of packets due to bottlenecks caused by port saturation. Broadcast storm
suppression prevents broadcast traffic storms from engulfing the network. Port-based VLANs
provide traffic security and efficient use of network bandwidth. CoS priority queueing ensures the
minimum delay for moving real-time multimedia data across the network. While multicast filtering
and routing provides support for real-time network applications. Some of the management features
are briefly described below.
Configuration Backup and Restore – You can save the current configuration settings to a file on a
TFTP server, and later download this file to restore the switch configuration settings.
Authentication – This switch authenticates management access via the console port or Telnet. User
names and passwords can be configured locally or can be verified via a remote authentication
server (i.e., RADIUS or TACACS+). Port-based authentication is also supported via the IEEE
802.1x protocol. This protocol uses the Extensible Authentication Protocol over LANs (EAPOL) to
request user credentials from the 802.1x client, and then verifies the client’s right to access the
network via an authentication server.
Other authentication options include SSH for secure management access over a Telnet-equivalent
connection, IP address filtering for SNMP/Telnet management access, and MAC address filtering
for port access.
Access Control Lists – ACLs provide packet filtering for IP frames (based on address, protocol,
TCP/UDP port number or TCP control code) or any frames (based on MAC address or Ethernet
type). ACLs can by used to improve performance by blocking unnecessary network traffic or to
implement security controls by restricting access to specific network resources or protocols.
Access Control Lists – ACLs provide packet filtering for IP frames (based on address, protocol,
TCP/UDP port number or TCP control code) or any frames (based on MAC address or Ethernet
type). ACLs can by used to improve performance by blocking unnecessary network traffic or to
implement security controls by restricting access to specific network resources or protocols.
DHCP Server and DHCP Relay – A DHCP server is provided to assign IP addresses to host
devices. Since DHCP uses a broadcast mechanism, a DHCP server and its client must physically
reside on the same subnet. Since it is not practical to have a DHCP server on every subnet, DHCP
Relay is also supported to allow dynamic configuration of local clients from a DHCP server located
in a different network.
Port Configuration – You can manually configure the speed, duplex mode, and flow control used
on specific ports, or use auto-negotiation to detect the connection settings used by the attached
device. Use the full-duplex mode on ports whenever possible to double the throughput of switch
connections. Flow control should also be enabled to control network traffic during periods of
congestion and prevent the loss of packets when port buffer thresholds are exceeded. The switch
supports flow control based on the IEEE 802.3x standard.
Rate Limiting – This feature controls the maximum rate for traffic transmitted or received on an
interface. Rate limiting is configured on interfaces at the edge of a network to limit traffic into or
out of the network. Traffic that falls within the rate limit is transmitted, while packets that exceed
the acceptable amount of traffic are dropped.

Introduction
4NXA-ENET Software Management Guide
Port Mirroring – The switch can unobtrusively mirror traffic from any port to a monitor port. You
can then attach a protocol analyzer or RMON probe to this port to perform traffic analysis and
verify connection integrity.
Port Trunking – Ports can be combined into an aggregate connection. Trunks can be manually set
up or dynamically configured using IEEE 802.3ad Link Aggregation Control Protocol (LACP). The
additional ports dramatically increase the throughput across any connection, and provide
redundancy by taking over the load if a port in the trunk should fail. The switch supports one trunk
with two Gigabit optional module ports.
Broadcast Storm Control – Broadcast suppression prevents broadcast traffic from overwhelming
the network. When enabled on a port, the level of broadcast traffic passing through the port is
restricted. If broadcast traffic rises above a pre-defined threshold, it will be throttled until the level
falls back beneath the threshold.
Static Addresses – A static address can be assigned to a specific interface on this switch. Static
addresses are bound to the assigned interface and will not be moved. When a static address is seen
on another interface, the address will be ignored and will not be written to the address table. Static
addresses can be used to provide network security by restricting access for a known host to a
specific port.
IEEE 802.1D Bridge – The switch supports IEEE 802.1D transparent bridging. The address table
facilitates data switching by learning addresses, and then filtering or forwarding traffic based on
this information. The address table supports up to 8K addresses.
Store-and-Forward Switching – The switch copies each frame into its memory before forwarding
them to another port. This ensures that all frames are a standard Ethernet size and have been
verified for accuracy with the cyclic redundancy check (CRC). This prevents bad frames from
entering the network and wasting bandwidth.
To avoid dropping frames on congested ports, the switch provides 8 MB for frame buffering. This
buffer can queue packets awaiting transmission on congested networks.
Spanning Tree Protocol – The switch supports these spanning tree protocols:
Spanning Tree Protocol (STP, IEEE 802.1D) – This protocol adds a level of fault tolerance by
allowing two or more redundant connections to be created between a pair of LAN segments. When
there are multiple physical paths between segments, this protocol will choose a single path and
disable all others to ensure that only one route exists between any two stations on the network. This
prevents the creation of network loops. However, if the chosen path should fail for any reason, an
alternate path will be activated to maintain the connection.
Rapid Spanning Tree Protocol (RSTP, IEEE 802.1w) – This protocol reduces the convergence time
for network topology changes to about 10% of that required by the older IEEE 802.1D STP
standard. It is intended as a complete replacement for STP, but can still interoperate with switches
running the older standard by automatically reconfiguring ports to STP-compliant mode if they
detect STP protocol messages from attached devices.
Virtual LANs – The switch supports up to 255 VLANs. A Virtual LAN is a collection of network
nodes that share the same collision domain regardless of their physical location or connection point
in the network. The switch supports tagged VLANs based on the IEEE 802.1Q standard. Members
of VLAN groups can be manually assigned to a specific set of VLANs. This allows the switch to