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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 8 Configuring Ethernet Virtual Connections
Configuring Other Features on EFPs
To reenable MAC address learning, use the mac-address-table learning global configuration command.
The command causes the configuration to appear in the show running-config privileged EXEC
command display.
Configuration Examples
This example shows how to disable MAC address learning on VLAN 10:
Router(config)# no mac-address-table learning vlan 10
This example shows how to disable MAC-address learning for all modules on a specific routed interface:
Router(config)# no mac-address-table learning interface GigabitEthernet 0/5
Router(config)#
This example shows how to disable MAC address learning for port-channel interface:
Router(config)# no mac-address-table learning interface port-channel 1
Verification
The following are the examples of the outputs using the show commands.
Router# show mac-address-table
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
20 2222.2222.2222 STATIC Gi0/2
10 0000.0700.0a00 DYNAMIC Gi0/9
10 0000.0700.0b00 DYNAMIC Gi0/1
Total Mac Addresses for this criterion: 3
In the above example, the show mac-address-table command displays both the dynamically and
statically learned addresses.
Following is an example for show mac-address-table dynamic command which displays only
dynamically learned addresses.
Router# show mac-address-table dynamic
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
10 0000.0700.0a00 DYNAMIC Gi0/9
10 0000.0700.0b00 DYNAMIC Gi0/1
Total Mac Addresses for this criterion: 2
Following is an example for show mac-address-table vlan 10 command which displays only the
addresses learned on a particular VLAN/BD.
Router# show mac-address-table vlan 10
Mac Address Table
-------------------------------------------
Step 3
end Return to privileged EXEC mode.
Step 4
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command or Action Purpose