• Yes - Saves configuration changes and exits the configuration session.
• No - Exits the configuration session without committing the configuration changes.
• Cancel - Remains in the configuration mode, without committing the configuration changes.
Configuring Bridge Domain Parameters
To configure bridge domain parameters, associate these parameters with a bridge domain:
• Maximum transmission unit (MTU)—Specifies that all members of a bridge domain have the same MTU.
The bridge domain member with a different MTU size is not used by the bridge domain even though it
is still associated with a bridge domain.
• Flooding—Flooding is enabled always. You cannot disable it.
• Dynamic ARP Inspection (DAI)—Ensures only valid ARP requests and responses are relayed.
• IP SourceGuard (IPSG)—Enables source IP address filtering on a Layer 2 port.
To verify if the DAI and IPSG features are working correctly, look up the packets dropped statistics for DAI
and IPSG violation. The packet drops statistics can be viewed in the output of the show l2vpn bridge-domain
bd-name <> detail command.
Note
SUMMARY STEPS
1. configure
2. l2vpn
3. bridge group bridge-group-name
4. bridge-domain bridge-domain-name
5. mtu bytes
6. dynamic-arp-inspection { address-validation | disable | logging }
7. ip-source-guard logging
8. Use the commit or end command.
DETAILED STEPS
Step 1 configure
Example:
RP/0/RSP0/CPU0:router# configure
Enters the Global Configuration mode.
Step 2 l2vpn
Example:
RP/0/RSP0/CPU0:router(config)# l2vpn
RP/0/RSP0/CPU0:router(config-l2vpn)#
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
234
Implementing Multipoint Layer 2 Services
Configuring Bridge Domain Parameters
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