Management and Configuration Guide K/KA/KB.15.15

Configuring the system module used to select the Event Log messages sent to a syslog
server........................................................................................................................424
Operating notes for debug and Syslog...............................................................................425
Diagnostic tools....................................................................................................................426
Port auto-negotiation........................................................................................................426
Ping and link tests............................................................................................................426
Ping test.....................................................................................................................426
Link test......................................................................................................................426
Executing ping or link tests (WebAgent).........................................................................426
Testing the path between the switch and another device on an IP network...........................427
Halting a ping test before it concludes...........................................................................429
Issuing single or multiple link tests.................................................................................429
Tracing the route from the switch to a host address...............................................................430
Stopping an ongoing traceroute search..........................................................................431
A low maxttl causes traceroute to halt before reaching the destination address....................431
If a network condition prevents traceroute from reaching the destination.............................432
Viewing Switch Configuration and Operation...........................................................................432
Viewing the startup or running configuration file...................................................................432
Viewing the configuration file (WebAgent)..........................................................................433
Viewing a summary of switch operational data....................................................................433
Saving show tech command output to a text file..............................................................434
Customizing show tech command output........................................................................435
Viewing more information on switch operation.....................................................................437
Searching for text using pattern matching with show command.........................................437
Viewing the information you need to diagnose problems.......................................................440
Restoring the factory-default configuration................................................................................441
Resetting to the factory-default configuration........................................................................441
Erase start-up config....................................................................................................441
Using Clear/ Reset......................................................................................................441
Zeroization......................................................................................................................441
Zeroizing from the ROM console...................................................................................442
Zeroizing with HA.......................................................................................................443
Restoring a flash image.........................................................................................................443
Recovering from an empty or corrupted flash state................................................................443
DNS resolver.......................................................................................................................444
DNS resolver operation....................................................................................................445
Configuring and using DNS resolution with DNS-compatible commands.................................446
Configuring a DNS entry..................................................................................................446
Using DNS names with ping and traceroute........................................................................447
Viewing the current DNS configuration...............................................................................448
Operating notes..............................................................................................................449
Locating a switch (Locator LED)...............................................................................................449
Transceiver information..........................................................................................................450
Testing the Cable.............................................................................................................455
Viewing transceiver information for copper transceivers with VCT support................................457
Mitigating flapping transceivers.........................................................................................457
11 Scalability: IP Address, VLAN, and Routing Maximum Values......................460
A Chassis Redundancy (8200zl Switches).....................................................462
Viewing management module redundancy status......................................................................462
Enabling or disabling redundant management.........................................................................462
Transitioning from no redundancy to nonstop switching..............................................................466
Setting the Rapid Switchover Stale Timer.............................................................................466
Directing the standby module to become active........................................................................466
Setting the rapid switchover stale timer....................................................................................467
18 Contents