Cisco CRS Configuration Manual page 117

Implementing Multipoint Layer 2 Services
You can disable the MAC flush at the bridge domain or bridge port level. By default, the MACs learned on
a specific port are immediately flushed, when that port becomes nonfunctional.
SUMMARY STEPS
1. configure
2. l2vpn
3. bridge group bridge-group-name
4. bridge-domain bridge-domain-name
5. mac
6. port-down flush disable
7. Use the commit or end command.
DETAILED STEPS
Step 1 configure
Example:
RP/0/RP0/CPU0:router# configure
Enters the Global Configuration mode.
Step 2 l2vpn
Example:
RP/0/RP0/CPU0:router(config)# l2vpn
RP/0/RP0/CPU0:router(config-l2vpn)#
Enters L2VPN configuration mode.
Step 3 bridge group bridge-group-name
Example:
RP/0/RP0/CPU0:router(config-l2vpn)# bridge group csco
RP/0/RP0/CPU0:router(config-l2vpn-bg)#
Creates a bridge group so that it can contain bridge domains and then assigns network interfaces to the bridge domain.
Step 4 bridge-domain bridge-domain-name
Example:
RP/0/RP0/CPU0:router(config-l2vpn-bg)# bridge-domain abc
RP/0/RP0/CPU0:router(config-l2vpn-bg-bd)#
Establishes a bridge domain and enters l2vpn bridge group bridge domain configuration mode.
Step 5 mac
Example:
RP/0/RP0/CPU0:router(config-l2vpn-bg-bd)# mac
RP/0/RP0/CPU0:router(config-l2vpn-bg-bd-mac)#
Enters l2vpn bridge group bridge domain MAC configuration mode.
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
Configuring the MAC Address-related Parameters
103