Checking Consistency Of Mac Address Tables - Cisco Nexus 9000 Series Configuration Manual

Configuring Layer 2 Switching
MAC addresses are aged out up to two times the configured MAC address table aging timeout.
Note
You can also configure the MAC aging time in interface configuration mode or VLAN configuration
Note
mode.
Procedure
Step 1
Step 2
Step 3
Step 4
Step 5
This example shows how to set the ageout time for entries in the Layer 2 MAC address table to 600 seconds
(10 minutes):
switch# config t
switch(config)# mac address-table aging-time 600
switch(config)#

Checking Consistency of MAC Address Tables

You can check the match between the MAC address table on the supervisor and all the modules.
Command or Action
config t
Example:
switch# config t
switch(config)#
mac address-table aging-time seconds
Example:
switch(config)# mac address-table
aging-time 600
exit
Example:
switch(config)# exit
switch#
show mac address-table aging-time
Example:
switch# show mac address-table
aging-time
copy running-config startup-config
Example:
switch# copy running-config
startup-config
Cisco Nexus 9000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
Checking Consistency of MAC Address Tables
Purpose
Enters configuration mode.
Specifies the time before an entry ages out and
is discarded from the Layer 2 MAC address table.
The range is from 120 to 918000; the default is
1800 seconds. Entering the value 0 disables the
MAC aging.
Exits the configuration mode.
(Optional)
Displays the aging time configuration for MAC
address retention.
(Optional)
Copies the running configuration to the startup
configuration.
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