Queue Sharing and Redirection
Quality of Service Guide 403
• If a redirected policer ID in the SAP ingress QoS policy does not match a policer ID
in the named ingress queue group template, the redirection will fail.
• If the SAP ingress QoS policy is currently applied to a non-Ethernet port or an
Ethernet port where the specified ingress queue group instance does not exist on the
forwarding plane, the redirection will fail.
If the operation above is successful, then:
• The system increments the association counter for the ingress queue group template
with the same name as the queue group specified in the SAP redirection for each
forwarding class redirected to the template.
• The system increments the policer ID association counter within the queue group
template for each forwarding class redirected to a policer ID.
• The system increments the forwarding plane queue group instance association
counter for each ingress queue group instance where a SAP ingress QoS policy
specifying redirection is applied to a SAP.
When redirection to a named queue group is removed from an ingress SAP:
• If the forwarding class is being moved to another queue group policer ID that does
not exist within the ingress FP queue group, the redirection removal from the current
queue group policer ID will fail.
• If the forwarding class is being moved to a local policer ID within the SAP ingress
QoS policy and the local policer ID does not exist, the redirection removal from the
current queue group policer ID will fail.
• If the forwarding class is being moved to a local policer ID within the SAP ingress
QoS policy and it is the first forwarding class to be mapped to the policer ID the
system will attempt to instantiate the policer on each ingress SAP where the SAP
ingress QoS policy is applied. If the policer cannot be created on any of the SAPs,
the redirection removal from the current queue group policer ID will fail.
If the operation above is successful, then:
• The system decrements the association counter for the ingress queue group template
with the same name as the queue group previously specified in the forwarding class
redirection.
• The system decrements the policer ID association counter within the queue group
template for the policer ID previously specified in the forwarding class redirection.
The system decrements the forwarding plane queue group template association counter for
each ingress queue group where redirection is applied to the ingress SAP.
For the SAP-based provisioning model, the rules for redirecting a forwarding class queue to
an egress port queue group are similar to those on ingress.
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