Alcatel-Lucent 7210 SAS M OS Quality Of Service Manual page 22

QoS Overview
and there are always 8 queues at the port level. An access egress policy also defines how to remark
the forwarding class to IEEE 802.1p bits in the customer traffic.
For 7210 SAS-M device configured to operate in access-uplink mode, there are two types of
network QoS policies, one applied to a network IP interface and the other type is applied to a
network port. Network QoS policies are applied to IP interfaces . On ingress, the policy applied to
an IP interface maps incoming MPLS LSP EXP values to forwarding class and profile state for the
traffic received from the core network. On egress, the policy maps forwarding class and profile
state to MPLS LSP EXP values for traffic to be transmitted into the core network. The network
policy applied to a network port maps incoming IP packets, DSCP or Dot1p values, to the
forwarding class and the profile state for the traffic received from the core network. On egress, the
policy maps forwarding class and profile state to DSCP and/or Dot1p values for IP traffic to be
transmitted into the core network.
For 7210 SAS M devices configured to operate in access uplink port, network QoS policies apply
to access uplink ports. On ingress, the policy applied to an IP interface maps incoming Dot1p
values to forwarding class and profile state for the traffic received from the core network. On
egress, the policy maps forwarding class and profile state to Dot1p values for traffic to be
transmitted into the core network.
Network queue policies are applied on egress to network ports when operating in network mode
and to access-uplink ports when operating in access-uplink mode. The policies define the
forwarding class queue characteristics for these entities. The FCs are mapped onto the queues.
There are 8 queues at the port level. FC-to-queue mapping is static and is not configurable. The
number of queues are static and there are always 8 queues at the port level.
Service ingress, access egress, and network QoS policies are defined with a scope of either
template or exclusive. Template policies can be applied to multiple entities (such as SAPs and
ports) whereas exclusive policies can only be applied to a single entity.
One service ingress QoS policy can be applied to a specific SAP. One access egress QoS policy
can be applied to the access port. One network QoS policy can be applied to a specific IP interface
or network port based on the type of network QoS policy when operating in network mode. One
network QoS policy can be applied to a access-uplink port when operating in access-uplink mode.
A network QoS policy defines both ingress and egress behavior. One network queue policy can be
applied to the network port or a access-uplink port.
If no QoS policy is explicitly applied to a SAP, port or interface, a default QoS policy is applied.
Page 22 7210 SAS M OS Quality of Service Guide