Feature Configuration - Alcatel-Lucent 7450 Quality Of Service Manual

Queue Sharing and Redirection
Based Redirection

Feature Configuration

The user applies a network QoS policy to the ingress context of a spoke-SDP to redirect the
mapping of a Forwarding Class (FC) to a policer defined in a queue-group template which is
instantiated on the ingress Forwarding Plane (FP) where the PW packets are received. (This
feature applies to both spoke-SDP and mesh-SDP. Spoke-SDP is used throughout for ease of
reading.)
config>service>vprn>interface>spoke-sdp>ingress>qos network-policy-id fp-redirect-
group queue-group-name instance instance-id
Let us refer to a queue-group containing policers as a policer queue-group. The user must
instantiate this queue-group by applying the following command:
config>card>fp>ingress>network>queue-group queue-group-name instance instance-id
The policers are instantiated at ingress FP, one instance per destination tap, and are used to
service packets of this spoke-SDP which are received on any port on the FP to support a
network IP interface on LAG and on any network IP interface to support ECMP on the
network IP interface and LSP reroutes to a different network IP interface on the same FP.
In the ingress context of the network QoS policy, the user defines the mapping of a FC to a
policer-id and instructs the code to redirect the mapping to the policer of the same ID in some
queue-group:
config>qos>network>ingress>fc>fp-redirect-group policer policer-id
config>qos>network>ingress>fc>fp-redirect-group broadcast-policer policer-id
config>qos>network>ingress>fc>fp-redirect-group unknown-policer policer-id
config>qos>network>ingress>fc>fp-redirect-group mcast-policer policer-id
The user can redirect the unicast, broadcast, unknown, and multicast packets of a FC to
different policers to allow for different policing rates for these packet types (broadcast and
unknown are only applicable to VPLS services). However, the queue-group is explicitly
named only at the time the network QoS policy is applied to the spoke-SDP as shown above
with the example of the VPRN service.
When the FC of a PW is redirected to use a policer in the named queue-group, the policer
feeds the existing per-FP ingress shared queues referred to as policer-output-queues. These
queues are shared by both access and network policers configured on the same ingress FP.
The shared queue parameters are configurable using the following command:
configure>qos>shared-queue policer-output-queues
408 Quality of Service Guide