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Default Subscriber Policies
Each network interface is associated with a default
subscriber policy for that interface type. The subscriber policy is
a set of forwarding and filtering rules that defines how the specified
interface handles various packet or attribute types, as follows:
- For each packet type listed in Table 79, the subscriber policy specifies whether the network interface
permits (forwards) or denies (filters or drops) packets of that type.
- 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 79 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 79: Default
Subscriber Policies for VPLS Network Interfaces
|
Packet/Attribute Type
|
Default Subscriber Policy
|
Default Trunk Policy
|
|
ARP
|
Permit
|
Permit
|
|
Broadcast
|
Deny
|
Permit
|
|
IP
|
Permit
|
Permit
|
|
MPLS
|
Permit
|
Permit
|
|
Multicast
|
Permit
|
Permit
|
|
PPPoE
|
Permit
|
Permit
|
|
Relearn
|
Permit
|
Permit
|
|
Unicast (user-to-user)
|
Permit
|
Permit
|
|
Unknown unicast DA
|
Deny
|
Permit
|
|
Unknown protocol
|
Permit
|
Permit
|
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