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This document describes how to configure MAC limiting.
MAC limiting is supported on the following interface types:
Mac address limiting per bridge-domain restricts the number of MAC addresses that the router learns in bridge-domain on an EFP, pseudowire or switchport.
Note | Local connect feature is not supported on the Cisco router. However, to simulate a local connect scenario, configure the connecting EFPs on the same bridge domain and disable the mac-learning on the bridge domain by setting the MAC limit to 0. Use the mac-address-table limit bdomain num maximum 0 action limit command to disable mac-learning on the router. |
When the total number of addresses in a bridge-domain exceeds the maximum number, the router takes a violation action. You can enable the following actions:
Note | The threshold value must be 80% of the maximum value configured for the recovery mechanism. |
Note | Warning is the default action when no action is configured. |
Note | The functionality of automatic error recovery is not supported on the Cisco ASR 900 RSP2 module. |
1.
configure terminal
2. mac-address-table limit bdomain id maximum num action {warning | limit | shutdown} [flood]
3.
end
4.
show mac-address-table limit
[bdomain id]
5.
copy running-config
startup-config
This example shows how to enable per-bridge-domain MAC limiting.
Router# enable Router# configure terminal Router(config)# mac-address-table limit bdomain 10 maximum 100 action limit flood Router(config)# end Router#show mac-address-table limit bdomain 10 bdomain action flood maximum Total entries Current state -------------+----------+------------+------------+---------------+--------------- 10 limit Disable 100 0 Within Limit