Cisco 7609-S Software Configuration Guide - Page 743

Chapter 42 Configuring PFC3BXL or PFC3B Mode MPLS QoS PFC3BXL or PFC3B Mode MPLS QoS Restrictions and Guidelines • police • mls qos map exp-dscp • mls qos map dscp-exp • mls qos map exp-mutation • mls qos exp-mutation • show mls qos mpls • no mls qos mpls trust exp Note For information about supported non-MPLS QoS commands, see "Configuring PFC QoS" section on page 41-56. The following commands are not supported: • set qos-group • set discard-class PFC3BXL or PFC3B Mode MPLS QoS Restrictions and Guidelines When configuring PFC3BXL or PFC3B mode MPLS QoS, follow these guidelines and restrictions: • For IP-to-MPLS or EoMPLS imposition when the received packet is an IP packet: - When QoS is disabled, the EXP value is based on the received IP ToS. - When QoS is queuing only, the EXP value is based on the received IP ToS. • For EoMPLS imposition when the received packet is a non-IP packet: - When QoS is disabled, the EXP value is based on the ingress CoS. - When QoS is queuing only, the EXP value is based on the received IP ToS. • For MPLS-to-MPLS operations: - Swapping when QoS is disabled, the EXP value is based on the original EXP value (in the absence of EXP mutation). - Swapping when QoS is queuing only, the EXP value is based on the original EXP value (in the absence of EXP mutation). - Imposing additional label when QoS is disabled, the EXP value is based on the original EXP value (in the absence of EXP mutation). - Imposing an additional label when QoS is queuing only, the EXP value is based on the original EXP value (in the absence of EXP mutation). - Popping one label when QoS is disabled, the EXP value is based on the underlying EXP value. - Popping one label when QoS is queuing only, the EXP value is based on the underlying EXP value. • EXP value is irrelevant to MPLS-to-IP disposition. OL-4266-08 Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX 42-17