6.3. DSCP, Dot1p, and MPLS EXP Classification Policy Command Reference

This command enables the context to define the mapping of the IP DSCP value in the IP header of the received packet to the forwarding class (FC) and ingress profile.

Note: A DSCP classification policy with IP precedence can be configured only in a service egress policy and used only with access SAP egress.

The no form of this command removes the definition of the DSCP classification policy. The no form of the policy cannot be executed if the policy is in use; for example, if the policy is associated with a network QoS policy.

This command creates a text description stored in the configuration file for a configuration context.

The description command associates a text string with a configuration context to help identify the context in the configuration file.

The no form of this command removes any description string from the context.

This command maps the IP DSCP value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the IP DSCP value to the FC.

Note: A default FC is not assigned on executing the no form. The default FC is assigned in the QoS policy with which this policy is associated with.

This command defines a specific IP precedence value that must be matched to perform the associated reclassification actions. If an egress packet on the SAP matches the specified IP precedence value, the FC or profile may be overridden. By default, the FC and profile of the packet are derived from ingress classification and profiling functions.

The IP precedence bits used to match against precedence reclassification rules come from the Type of Service (ToS) field within the IPv4 header. If the packet does not have an IPv4 header, precedence-based matching is not performed.

The reclassification actions from an IP precedence reclassification rule may be overridden by a DSCP matching event.

The fc keyword is optional. When specified, the egress classification rule overwrites the FC derived from ingress. The new FC is used for egress remarking and queue mapping decisions. If a DSCP match occurs after the IP precedence match, the new FC may be overridden by the higher priority match actions. If the higher priority match actions do not specify a new FC, the FC from the IP precedence match is used.

The profile keyword is optional. When specified, the egress classification rule overwrites the profile of the packet derived from ingress. The new profile value is used for egress remarking and queue congestion behavior. If a DSCP match occurs after the IP precedence match, the new profile may be overridden by the higher priority match actions. If the higher priority match actions do not specify a new profile, the profile from the IP precedence match is used.

The no form of this command removes the reclassification rule from the SAP egress QoS policy.

This command enables the context to define the map of the dot1p value in the Ethernet header of the received frame to the FC and ingress profile.

The no form of this command removes the definition of the policy. The no form of the policy cannot be executed if the policy is in use; for example, if the policy is associated with a network QoS policy.

This command maps the dot1p value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the dot1p value to FC.

A default FC is not assigned on executing the no form of this command. The default FC is assigned in the QoS policy with which this policy is associated with.

This command enables the context to define the map of the MPLS EXP value in the MPLS header of the received packet to the FC and ingress profile.

The no form of this command removes the definition of the policy. The no form of the policy cannot be executed if the policy is in use; for example, if the policy is associated with a network qos policy.

This command is used to map the MPLS EXP value to an FC and assigns the ingress profile to the packet. The configured value is used to match the value in the received packet and to assign the configured FC and profile on a exact match.

The no form of this command removes the mapping of the MPLS EXP value to the FC.

Note: A default FC is not assigned on executing the no form. The default FC is assigned in the QoS policy with which this policy is associated with.

This command displays the dot1p classification.

This command displays the DSCP classification.

This command displays the association between network ingress MPLS LSP-EXP values and FCes and profiles.