Specifications

mpls control-word
MP-157
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
mpls control-word
To enable the Multiprotocol Label Switching (MPLS) control word in an Any Transport over MPLS
(AToM) static pseudowire connection, use the mpls control-word c
ommand in xconnect configuration
mode. To disable the control word, use the no form of this command.
mpls control-word
no mpl
s control-word
Syntax Description This command has no arguments or keywords.
Command Default The control word is included in connections.
Command Modes Xconnect configuration
Command History
Usage Guidelines This command is used when configuring AToM static pseudowires, and is mandatory when configuring
Fr
ame Relay data-link connection identifier (DLCI) and ATM adaptation layer 5 (AAL5) attachment
circuits.
Because the control word is included by default, it may be necessary to explicitly disable this command
i
n AToM static pseudowire configurations.
When the mpls control-word c
ommand is used in static pseudowire configurations, the command must
be configured the same way on both ends of the connection to work correctly, or else the provider edge
routers will not be able to exchange control messages to negotiate inclusion or exclusion of the control
word.
Examples The following example shows the configuration for both sides of an AToM static pseudowire connection:
Router# configure terminal
Router(config)# interface Ethernet 1/0
Router(config-if)# xconnect 10.131.191.251 100 encapsulation mpl
s manual pw-class mpls
Router(config-if-xconn)# mpls label 100 150
Router(config-if-xconn)# no mpls control-word
Router(config-if-xconn)# exit
Router(config-if)# exit
Router# configu
re terminal
Router(config)# interface Ethernet 1/0
Router(config-if)# xconnect 10.132.192.252 100 encapsulation mpl
s manual pw-class mpls
Router(config-if-xconn)# mpls label 150 100
Release Modification
12.2(33)SRB This command was introduced.