Table 113 on page 579 lists the commands that you can use to modify subscriber policies
for subscriber (client) interfaces associated with either a VPLS instance or a standard
bridge group.
Table 113: Commands to Configure Subscriber Policies
pppoearp
relearnbridge subscriber-policy
subscriber-policybroadcast
unicastip
unknown-destinationmpls
unknown-protocolmulticast
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 112 on page 578, 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.
Related Topics Configuring VPLS with BGP Signaling on a PE Router on page 590•
• Configuring VPLS with LDP Signaling on a PE Router on page 602
• For information about using these commands, see Configuring Secure Policies in the
JunosE Link Layer Configuration Guide.
BGP Signaling for VPLS Overview
BGP multiprotocol extensions (MP-BGP) enable BGP to support IPv4 services such as
BGP/MPLS VPNs, which are sometimes known as RFC 2547bis VPNs. VPLS with BGP
579Copyright © 2010, Juniper Networks, Inc.
Chapter 11: VPLS Overview
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