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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
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.
