Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 629

Configuring BGP Multihoming for VPLS
You can configure BGP multihoming in the VPLS network to provide redundancy in
the event of failures such as a PE router-to-CE device link failure, the failure of a PE
router, or an MPLS reachability failure between the local PE router and a remote PE
router. BGP multihoming enables you to connect a customer site to two or more PE
routers. A redundant PE router can begin providing service to the customer site as
soon as the failure is detected. The redundant connectivity maintains the VPLS service
and traffic forwarding to and from the multihomed site while avoiding the formation
of layer 2 traffic loops.
To configure BGP multihoming on a VPLS PE router:
You must configure the same site ID on all PE routers connected to the multihomed
customer site. The site ID shared by the connected PE routers should be different
than the site IDs configured on the remote PE routers in the VPLS network.
You can configure a different block offset, label range, and route distinguisher for
each connected PE router.
Related Topics
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.
2.
Configure the site as multihomed and specify a multihoming priority for the PE
site for this instance.
host1(config)#bridge customer1 vpls site-name westford site-id 1 multi-homed
priority 1
Configuration Tasks for VPLS with BGP Signaling on page 590
Configuration Tasks for VPLS with LDP Signaling on page 605
bridge vpls site-name site-id
(Optional) Configure a VPLS instance to acquire dynamically learned MAC
addresses.
host1(config)#bridge vplsB acquire
(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.
Chapter 10: Configuring VPLS
Configuring BGP Multihoming for VPLS
593