Policing And Marking; Preserving Ip Tos; Exp Mutation - Cisco 7604 Configuration Manual

PFC3BXL or PFC3B Mode MPLS QoS Features
based on the EXP bits in the received topmost label of received MPLS packets (after a policy is
installed). See the
information.

Policing and Marking

Policing causes traffic that exceeds the configured rate to be discarded or marked down to a higher drop
precedence. Marking is a way to identify packet flows to differentiate them. Packet marking allows you
to partition your network into multiple priority levels or classes of service.
The PFC3BXL or PFC3B mode MPLS QoS policing and marking features that you can implement
depend on the received traffic type and the forwarding operation applied to the traffic. See
a Policy Map" section on page 42-23

Preserving IP ToS

The PFC3BXL or PFC3B automatically preserves the IP ToS during all MPLS operations including
imposition, swapping, and disposition.You do not need to enter a command to save the IP ToS.

EXP Mutation

You can configure a named egress EXP mutation map to mutate the internal DSCP-derived EXP value
before it is used as the egress EXP value. You can attach egress EXP mutation maps to these interface
types:
•
•
•
•
You cannot attach EXP mutation maps to these interface types:
•
•
For configuration information, see the
Mutation" section on page
MPLS DiffServ Tunneling Modes
The PFC3BXL or PFC3B uses MPLS DiffServ tunneling modes. Tunneling provides QoS transparency
from one edge of a network to the other edge of the network. See the
section on page 42-32
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
42-4
"Configuring a Class Map to Classify MPLS Packets" section on page 42-20
Optical service module (OSM) ports
LAN or OSM port subinterfaces
Layer 3 VLAN interfaces
Layer 3 LAN ports
Layer 2 LAN ports (switchports)
FlexWAN ports or subinterfaces
42-29.
for information.
Chapter 42 Configuring PFC3BXL or PFC3B Mode MPLS QoS
for information.
"Configuring PFC3BXL or PFC3B Mode MPLS QoS Egress EXP
"Configuring
"MPLS DiffServ Tunneling Modes"
OL-4266-08
for