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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
Configuring PFC3BXL or PFC3B Mode MPLS QoS
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 41-74
.
•
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 PFC3BXL or 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 PFC3BXL or PFC3B does not mark in-profile
traffic; when marking down out-of-profile traffic, the PFC3BXL or PFC3B marks the outgoing
topmost label. The PFC3BXL or 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 41-74
.
•
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 PFC3BXL or 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 PFC3BXL or 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 PFC3BXL or PFC3B Mode MPLS QoS Policy Map Class Summary
To display a PFC3BXL or PFC3B mode MPLS QoS policy map class summary, perform this task:
This example shows how to display a PFC3BXL or PFC3B mode MPLS QoS policy map class summary:
Router#
show mls qos mpls
QoS Summary [MPLS]: (* - shared aggregates, Mod - switch module)
Int Mod Dir Class-map DSCP Agg Trust Fl AgForward-By AgPoliced-By
Id Id
-------------------------------------------------------------------------------
Fa3/27 5 In exp3 0 2 dscp 0 0 0
All 5 - Default 0 0* No 0 3466140423 0
Command
Purpose
Router#
show mls qos mpls
[{
interface
interface_type
interface_number
} | {
module
slot
}
Displays a PFC3BXL or PFC3B mode MPLS QoS policy map
class summary.
