42-16
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 42 Configuring PFC3BXL or PFC3B Mode MPLS QoS
MPLS QoS Commands
MPLS QoS Commands
PFC3BXL or PFC3B MPLS QoS on the Cisco 7600 series routers supports the following MPLS QoS
commands:
• match mpls experimental topmost
• set mpls experimental imposition
IP precedence to DSCP map
(DSCP set from IP precedence values)
IP precedence 0 = DSCP 0
IP precedence 1 = DSCP 8
IP precedence 2 = DSCP 16
IP precedence 3 = DSCP 24
IP precedence 4 = DSCP 32
IP precedence 5 = DSCP 40
IP precedence 6 = DSCP 48
IP precedence 7 = DSCP 56
DSCP to EXP map
(EXP set from DSCP values)
DSCP 0–7 = EXP 0
DSCP 8–15 = EXP 1
DSCP 16–23 = EXP 2
DSCP 24–31 = EXP 3
DSCP 32–39 = EXP 4
DSCP 40–47 = EXP 5
DSCP 48–55 = EXP 6
DSCP 56–63 = EXP 7
Marked-down DSCP from DSCP map Marked-down DSCP value equals original DSCP value
(no mark down)
EXP mutation map No mutation map by default
Policers None
Policy maps None
MPLS flow mask in NetFlow table Label + EXP value
MPLS core QoS There are four possibilities at the MPLS core QoS:
• Swapping—Incoming EXP field is copied to outgoing
EXP field.
• Swapping + imposition—Incoming EXP field is copied
to both the swapped EXP field and the imposed EXP
field.
Note If there is a service policy with a set for EXP field, its
EXP field will be placed into the imposed label and
also into the swapped label.
• Disposition of topmost label—Exposed EXP field is
preserved.
• Disposition of only label—Exposed IP DSCP is
preserved.
MPLS to IP edge QoS Preserve the exposed IP DSCP
Feature Default Value
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