set mpls experimental
To set the experimental (EXP) value of the Multiprotocol Label Switching (MPLS) packet topmost or imposition
labels, use the set mpls experimental command in policy map configuration mode. To leave the EXP value
unchanged, use the no form of this command.
set mpls experimental {imposition| topmost} exp-value
no set mpls experimental {imposition| topmost} exp-value
Syntax Description
Specifies to set the EXP value of the imposition label.imposition
Specifies to set the EXP value of the topmost label.topmost
Value of the MPLS packet label. Range is 0 to 7.
exp-value
Command Default
No MPLS experimental value is set
Command Modes
Policy map class configuration
Command History
ModificationRelease
This command was introduced.Release 2.0
Added the imposition keyword and changed overall command name
from set mpls experimental topmost to set mpls experimental.
Release 3.3.0
Added the range for the exp-value argument.
Release 3.4.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
After the MPLS experimental bits are set, other QoS services such as Modified Deficit Round Robin (MDRR)
and Weighted Random Early Detection (WRED) then operate on the bit settings.
The network gives priority (or some type of expedited handling) to the marked traffic through the application
of MDRR or WRED at points downstream in the network. Typically, the MPLS experimental value is set at
the edge of the network (or administrative domain) and queueing is acted on it thereafter. MDRR can speed
up handling for high-priority traffic at congestion points. WRED ensures that high-priority traffic has lower
loss rates than other traffic during times of congestion.
Cisco IOS XR Modular Quality of Service Command Reference for the Cisco CRS Router, Release 4.0
104 OL-23235-03
Quality of Service Commands on the Cisco IOS XR Software
set mpls experimental
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