Cisco NM-8B-U User Guide - Page 74
Verifying the MAC Address Table, Configuring Aging Timer-timer, Verifying the Aging Timer
UPC - 074632001001
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Configuration Tasks 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Verifying the MAC Address Table Step 1 Use the show mac command to verify the MAC Address Table: Router# show mac Destination Address 0001.6443.6440 0004.c16d.9be1 0004.ddf0.0282 0006.0006.0006 001b.001b.ad45 Address Type Static Dynamic Dynamic Dynamic Dynamic VLAN ---- 1 1 1 1 1 Destination Port Vlan1 FastEthernet2/13 FastEthernet2/13 FastEthernet2/13 FastEthernet2/13 Configuring Aging Timer-timer To configure the aging timer, use the following commands beginning in privileged EXEC mode: Step 1 Step 2 Step 3 Command Router# configure terminal Router(config)# mac-address-table aging-time seconds Router(config)# end Purpose Enters global configuration mode. Configures the MAC address aging-timer age in seconds Exits configuration mode. Caution Cisco advises that you not change the aging timer because the Ethernet switch network module could go out of synchronization. Verifying the Aging Timer Step 1 Use the show mac-address-table aging-time command to verify the aging timer: Router # show mac-address-table aging-time Mac address aging time 23 Configuring Cisco Discovery Protocol • Enabling Cisco Discovery Protocol, page 75 • Enabling CDP on an Interface, page 75 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 74