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For each packet type listed in Table 112 on page 578, the subscriber policy specifies

whether the network interface permits (forwards) or denies (filters or drops) packets

of that type.

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For the relearn attribute, the subscriber policy specifies whether the network interface

can relearn a MAC address entry on a different interface from the one initially associated

with this entry in the forwarding table. Permit indicates that relearning is allowed; deny

indicates that relearning is prohibited.

Table 112 on page 578 lists the default values for each packet or attribute type defined in

the policies for subscriber interfaces and trunk interfaces. The default subscriber policy

differs in one way from the default trunk policy: broadcast packets and packets with

unknown unicast destination addresses (DAs) are denied in the subscriber policy and

permitted in the trunk policy.

Table 112: Default Subscriber Policies for VPLS Network Interfaces

Default Trunk PolicyDefault Subscriber PolicyPacket/Attribute Type

PermitPermitARP

PermitDenyBroadcast

PermitPermitIP

PermitPermitMPLS

PermitPermitMulticast

PermitPermitPPPoE

PermitPermitRelearn

PermitPermitUnicast (user-to-user)

PermitDenyUnknown unicast DA

PermitPermitUnknown protocol

Modifying Subscriber Policies

For a network interface configured as a subscriber (client) interface, you can modify the

default subscriber policy to change the default permit or deny value for one or more of

the packet or attribute types listed in Table 112 on page 578.

You cannot, however, change the default trunk policy for a network interface configured

as a trunk interface or for the VPLS virtual core interface. Trunk interfaces and the VPLS

virtual core interface always use the default trunk policy, which forwards packets of all

types and permits relearning.

JunosE 11.2.x BGP and MPLS Configuration Guide

Juniper JUNOSE 11.2.X BGP AND MPLS User Manual

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