Overview - Alcatel-Lucent 7210 SAS E OS Quality Of Service Manual

Overview

Overview
The network QoS policy consists of an ingress and egress component. The ingress component of
the policy defines how Dot1p bits are mapped to internal forwarding class and profile state. The
forwarding class and profile state define the Per Hop Behavior (PHB) or the QoS treatment
through the 7210 SAS. The mapping on each access uplink port defaults to the mappings defined
in the default network QoS policy until an explicit policy is defined for the access uplink ports. It
also defines the rate-limiting parameters for the traffic mapped to each forwarding classes. Traffic
mapped to each forwarding class can be rate limited using separate meters for each unicast and
multipoint traffic.
The egress component of the network QoS policy defines the queuing parameters associated with
each forwarding class.
Each forwarding class defined within the system automatically creates a queue on each access
uplink ports. This queue gets all the parameters defined within the default network QoS policy 1
until an explicit policy is defined for the access uplink ports.
Remarking is always enabled on the access uplink ports. If the egressing packet originated on an
ingress SAP, the egressQoS policy also defines the Dot1p bit marking based on the forwarding
class and the profile state. The default map of FC-Dot1p marking is as shown in default network
qos policy, policy id 1. All non-default network qos policies inherits the FC-Dot1p map as detailed
in Table-3.
Network policy-id 1 exists as the default policy and is applied to all access uplink ports by default.
The network policy 1 cannot be modified or deleted. It defines the default Dot1p-to-FC mapping
for the ingress. For the egress, it defines eight forwarding classes which represent individual
queues and the packet marking criteria.
New (non-default) network policy parameters can be modified. The no form of the command
reverts the object to the default values.
Changes made to a policy are applied immediately to all access uplink ports where the policy is
applied. For this reason, when a policy requires several changes, it is recommended that you copy
the policy to a work area policy-id. The work-in-progress copy can be modified until all the
changes are made and then the original policy-id can be overwritten with the config qos copy
command.
For information about the tasks and commands necessary to access the command line interface
and to configure and maintain your devices, refer to CLI Usage chapter in the 7210 SAS OS Basic
System Configuration Guide.
Page 56 7210 SAS-E OS Quality of Service Guide