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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter
set mpls
set mpls
To set an multiprotocol label switching (MPLS) experimental (EXP) value in the inbound packet to
classify packets, use the set mpls command in policy-map class configuration mode. To remove the
group MPLS value, use the no form of this command.
set mpls experimental {imposition | topmost} experimental _value
no set mpls experimental {imposition | topmost} experimental _value
Syntax Description
Defaults No traffic marking is defined.
Command Modes Policy-map class configuration
Command History
Usage Guidelines You can configure set mpls with all other marking actions, specifically set cos, set discard-class, set
dscp, set qos-group, and set precedence, for the same class.
In an MPLS network, packet IP precedence bits are copied into the MPLS EXP field at the edge of the
network. If a service provider wants to set a QoS value for an MPLS packet to a different value, instead
of overwriting the value in the IP precedence field that belongs to a customer, the service provider can
set the MPLS experimental field. The IP header remains available for the customer’s use, and the QoS
of an IP packet is not changed as the packet travels through the MPLS network.
To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode,
use the end command.
You can verify your settings by entering the show policy-map privileged EXEC command.
Examples This example shows how to classify all MPLS packets with a value of 5:
Switch(config)# policy-map policy_ftp
Switch(config-pmap)# class mpls_class
Switch(config-pmap-c)# set mpls topmost 5
Switch(config-pmap-c)# exit
imposition Specifies that the MPLS experimental value is set at tag imposition. This means
that the MPLS value in a packet header is set with the new value after the packet
is switched. This applies only to MPLS packets that are MPLS routed, but to all
MPLS tags that are imposed by the switch.
topmost Specifies that the MPLS experimental value is set for the outermost or topmost
label. This marks all valid MPLS packets.
experimental _value Sets the MPLS value to use to classify traffic. The range is from 0 to 7.
Release Modification
12.2(52)EY This command was introduced.
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