Virtual Private LAN Services
7750 SR OS Services Guide Page 695
A SAP may be a member of one and only one egress multicast group. If the multicast-group
command is executed with another egress multicast group name, the system will attempt to move the
SAP to the specified group. If the SAP is not placed into the new group, the SAP will remain a
member of the previous egress multicast group. Moving a SAP into an egress multicast group may
cause a momentary gap in replications to the SAP destination while the move is being processed.
The no form of the command removes the SAP from any egress multicast group in which it may
currently have membership. The SAP will be removed from all efficient multicast replication chains
and normal replication will apply to the SAP. A momentary gap in replications to the SAP destination
while it is being moved is possible. If the SAP is not currently a member in an egress multicast group,
the command has no effect.
Default no multicast-group
Parameters group-name — The group-name is required when specifying egress multicast group membership on a
SAP. An egress multicast group with the specified egress-multicast-group-name must exist and
the SAP must pass all common requirements or the command will fail.
Values Any valid egress multicast group name.
Default None, an egress multicast group name must be explicitly specified.
qinq-mark-top-only
Syntax [no] qinq-mark-top-only
Context config>service>vpls>sap>egress
Description When enabled (the encapsulation type of the access port where this SAP is defined as qinq), the qinq-
mark-top-only command specifies which P-bits to mark during packet egress. When disabled, both
set of P-bits are marked. When enabled, only the P-bits in the top Q-tag are marked.
The no form of this command disables the command.
Default no qinq-mark-top-only
qos
Syntax qos policy-id [shared-queuing | multipoint-shared]
no qos
Context config>service>vpls>sap>egress
config>service>vpls>sap>ingress
Description This command associates a Quality of Service (QoS) policy with an ingress or egress Service Access
Point (SAP) or IP interface.
QoS ingress and egress policies are important for the enforcement of SLA agreements. The policy ID
must be defined prior to associating the policy with a SAP or IP interface. If the policy-id does not
exist, an error will be returned.
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