Queue Sharing and Redirection
Quality of Service Guide 409
The CLI configuration in this section uses a spoke-SDP defined in the context of a VPRN
interface. However the PW shaping feature is supported with all PW based services including
the PW template.
Provisioning Model
Operationally, the provisioning model in the case of the ingress PW shaping feature consists
of the following steps:
1. Create an ingress queue-group template and configure policers for each FC which
needs to be redirected and optionally for each traffic type (unicast, broadcast,
unknown, or multicast).
2. Apply the queue-group template to the network ingress context of all IOM3/IMM
FPs where there exists a network IP interface which the PW packets can be received
on. This creates one instance of the template on the ingress of the FP. One or more
instances of the same template can be created.
3. Configure FC-to-policer mappings together with the policer redirect to a queue-
group in the ingress context of a network QoS policy. No queue-group name is
specified in this step which means the same network QoS policy can redirect
different PWs to different queue-group templates.
a. Apply this network QoS policy to the ingress context of a spoke-SDP inside a
service or to the ingress context of a PW template and specify the redirect queue-
group name.
b. One or more spoke-SDPs can have their FCs redirected to use policers in the
same policer queue-group instance.
The following are the constraints and rules of this provisioning model when used in the
ingress PW shaping feature:
1. Only a queue-group containing policers, can be instantiated in the network ingress
context of an IOM3/IMM FP. If the queue-group template contains policers and
queues, the queues are not instantiated.
2. If the queue-group contains queues only, the instantiation in the data path is failed.
3. One or more instances of the same policer queue-group name and/or a different
policer queue-group name can be created on network ingress context of an IOM3/
IMM FP.
4. The queue-group-name must be unique within all network ingress and access ingress
queue groups in the system.
5. The instantiated FP policer queue-group can be used by PW packets received on a
network IP interface configured on both Ethernet ports and POS ports of that IOM3/
IMM.
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