Network QoS policies

Network QoS policies define egress QoS marking and ingress QoS interpretation for traffic on core network IP interfaces. The router automatically creates egress queues for each of the forwarding classes on network IP interfaces.

A network QoS policy defines both the ingress and egress handling of QoS on the IP interface. The following functions are defined:

• ingress

  • defines DSCP, Dot1p, and IP criteria mappings to forwarding classes

  • defines LSP EXP value mappings to forwarding classes

• egress

  • defines DSCP and IP precedence mappings to forwarding classes

  • defines forwarding class to DSCP value markings

  • defines forwarding class to Dot1p/DE value markings

  • defines forwarding class to LSP EXP value markings

  • enables/disables remarking of QoS

  • defines FC to policer/queue-group queue mapping

The required elements to be defined in a network QoS policy are:

• a unique network QoS policy ID

• egress forwarding class to DSCP value mappings for each forwarding class

• egress forwarding class to Dot1p value mappings for each forwarding class

• egress forwarding class to LSP EXP value mappings for each forwarding class

• enabling/disabling of egress QoS remarking

• a default ingress forwarding class and in-profile/out-of-profile state

Optional network QoS policy elements include:

• DSCP name-to-forwarding class and profile state mappings for all DSCP values received

• LSP EXP value-to-forwarding class and profile state mappings for all EXP values received

• ingress FC fp-redirect-group policer mapping

• egress FC port-redirect-group queue/policer mapping

Network policy ID 1 is reserved as the default network QoS policy. The default policy cannot be deleted or changed.

The default network QoS policy is applied to all network interfaces that do not have another network QoS policy explicitly assigned. Table: Default network QoS policy egress marking describes the default network QoS policy egress marking.

For network ingress, Table: Default network QoS policy DSCP to forwarding class mappings and Table: Forwarding class and enqueuing priority classification hierarchy based on rule type list the default mapping of DSCP name and LSP EXP values to forwarding class and profile state for the default network QoS policy.