[Contents] [Prev] [Next] [Index] [Report an Error]

Considerations for VPLS Network Interfaces

When you configure network interfaces for a VPLS instance, you must ensure that the subscriber policy in effect for the interface is appropriate for your network configuration.

To ensure that the network interface permits relearning and forwards (permits) packets for all of the protocol types listed in Table 79, be sure to configure the network interface as a trunk (server) interface so that it always uses the default trunk policy. For example, the following commands associate a 10-Gigabit Ethernet interface with a VPLS instance named vplsBoston, and configure the interface as a trunk.



host1(config)#interface tenGigabitEthernet
4/0/1 

host1(config-if)#bridge-group vplsBoston subscriber-trunk

If you configure a VPLS network interface as a subscriber (client) interface, use care if you modify the default subscriber policy in effect for that interface. For example, if you use the arp command to change the default value for ARP packets from permit (forward) to deny (filter or drop), make sure you also use the bridge address command to add the appropriate static (nonlearned) ARP entry to the forwarding table. If an ARP entry expires from the forwarding table and the subscriber policy is configured to deny ARP packets, the router cannot properly forward subsequent ARP packets.

Considerations for VPLS Network Interfaces

Related Topics