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QoS Overview
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 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.
Network queue policies are applied on egress to ports . 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 service are always 8 queues at the port level.
Service ingress, service 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 and one service egress QoS policy can be applied to a specific SAP. One
network QoS policy can be applied to a specific IP interface or network port based on the type of
network QoS policy . A network QoS policy defines both ingress and egress behavior. One
network queue policy can be applied to the network port.
If no QoS policy is explicitly applied to a SAP, port or interface, a default QoS policy is applied.
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7210 SAS-X and 7210 SAS-R6 OS Quality of Service Guide
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