VPRN Services
7705 SAR OS Services Guide Page 421
SAPs
Encapsulations
The following SAP encapsulations are supported on the 7705 SAR VPRN service:
• Ethernet null
• Ethernet dot1q
•PPP
• MLPPP
• MC-MLPPP
QoS Policies
For each instance of VPRN service, QoS policies can be applied to the ingress and egress
VPRN interface SAPs.
VPRN service ingress QoS policies only create the unicast queues defined in the policy.
VPRN service egress QoS policies function in the same way as the do for other services,
where the class-based queues are created as defined in the policy. Both the Layer 2 and
Layer 3 criteria can be used in the QoS policies for traffic classification in a VPRN.
For VPRN services, the fabric mode needs to be set to aggregate mode as opposed to
per-destination mode. VPRN services are only supported with aggregate-mode fabric
profiles. When the fabric mode is set to per-destination mode, creation of VPRN service is
blocked through the CLI. The user must change the fabric mode to aggregate mode before
being able to configure VPRN services. As well, when a VPRN service is configured,
changing from aggregate mode is blocked. The fabric mode is configured under the
configure>qos>fabric-profile context. For more information, see the 7705 SAR
OS Quality of Service Guide.
CoS Marking for Self-generated Traffic
For each instance of VPRN service, DSCP marking and dot1p marking for self-generated
traffic QoS can be configured for the applications supported by the 7705 SAR.
For VPRN service, DSCP marking is configured in the vprn>sgt-qos>application
context. For more information about DSCP marking and self-generated QoS traffic, see
“CoS Marking for Self-generated Traffic” in the 7705 SAR OS Quality of Service Guide.
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