Cisco WS-SUP32-GE-3B Software Configuration Guide - Page 665

Chapter 39 Configuring MPLS QoS Configuring MPLS QoS Id Id Fa3/27 5 In iptcp 24 2 No 0 0 0 Vl300 5 In x 44 1 No 0 0 0 All 5 - Default 0 0* No 0 3468161522 0 Restrictions and Usage Guidelines The following restrictions and guidelines apply when using the police command to configure a policy map: • With MPLS, the exceed-action action command and the violate-action action command work similarly to IP usage. The packet may get dropped or the EXP value is marked down. For information on how these actions affect IP-to-IP traffic, see the "Configuring a Policy Map" section on page 38-61. • With MPLS, the set-dscp transmit action command and the set-prec-transmit action command set the internal DSCP that is mapped into the CoS bits, which affects queueing, however, they do not change the EXP value, except for imposition. • When swapping labels for received MPLS traffic with the PFC3B, you can mark down out-of-profile traffic using the police command exceed-action policed-dscp-transmit and violate-action policed-dscp-transmit keywords. The PFC3B does not mark in-profile traffic; when marking down out-of-profile traffic, the PFC3B marks the outgoing topmost label. The PFC3B does not propagate the marking down through the label stack. • With MPLS, the flow key is based on the label and EXP value; there is no flowmask option. Otherwise, flow key operation is similar to IP-to-IP. See the "Configuring a Policy Map" section on page 38-61. • You can use the police command to set the pushed label entry value to a value different from the default value during label imposition. • When imposing labels onto the received IP traffic with the PFC3B, you can mark the EXP field using the conform-action set-mpls-exp-imposition-transmit keywords. • During IP-to-MPLS imposition, IP ToS marking is not supported. If you configure a policy to mark IP ToS, the PFC3B marks the EXP value. Displaying a Policy Map You can display a policy map with an interface summary for MPLS QoS classes or with the configuration of all classes configured for all service policies on the specified interface. Displaying a MPLS QoS Policy Map Class Summary To display a MPLS QoS policy map class summary, perform this task: Command Router# show mls qos mpls [{interface interface_type interface_number} | {module slot} Purpose Displays a MPLS QoS policy map class summary. OL-11439-03 Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY 39-27