# Configuring Optional Attributes for VPLS Instances

After you create a basic VPLS instance, you can configure one or more optional attributes to manage the MAC address entries in the VPLS instance’s forwarding table, or to enable SNMP link status processing. The requirements and procedures for optional attributes are the same whether you employ BGP or LDP signaling for VPLS.

To configure these attributes, you use the same transparent bridging commands that you use to configure bridge groups that do not function as VPLS instances.

1. (Optional) Configure a VPLS instance to acquire dynamically learned MAC addresses.
   host1(config)#bridge vplsB acquire
2. (Optional) Enable a VPLS instance to filter (forward or discard) frames based on a specific MAC address, and to add static (nonlearned) address entries to the forwarding table.

   In this example, the VPLS instance forwards frames destined for the node with MAC address 0090.1a40.4c7c out the specified Gigabit Ethernet interface

   host1(config)#bridge vplsA address 0090.1a40.4c7c forward gigabitEthernet 3/0.1

   In this example, the VPLS instance drops frames sent from or destined for the node with MAC address 1011.22b2.333c

   host1(config)#bridge vplsB address 1011.22b2.333c discard
3. (Optional) Set the length of time that a dynamic (learned) MAC address entry can remain in the forwarding table of the specified VPLS instance before expiring.
   host1(config)#bridge vplsB aging-time 1000
4. (Optional) Set the maximum number of dynamic MAC address entries that the specified VPLS instance can learn.
   host1(config)#bridge vplsB learn 2500
5. (Optional) Enable SNMP link status processing for all network interfaces associated with the specified VPLS instance.
   host1(config)#bridge vplsB snmp-trap link-status

#### Related Documentation

- Configuring VPLS with BGP Signaling on a PE Router
- For more information about using these commands, see Configuring Optional Bridge Group Attributes in the JunosE Link Layer Configuration Guide.
- bridge acquire
- bridge address
- bridge aging-time
- bridge learn
- bridge snmp-trap link-status