Specifications

mpls mtu
MP-272
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
mpls mtu
To set the per-interface Multiprotocol Label Switching (MPLS) maximum transmission unit (MTU) for
labeled packets, use the mpls mtu command in interface configuration mode. To restore the default, use
the no form of this command.
mpls mtu [o
verride] bytes
no mpls mtu
Syntax Description
Command Default The default MPLS MTU is the MTU configured for the interface.
Command Modes Interface configuration (config-if)
Command History
override (Optional) Allows you to set the MPLS MTU value higher than the interface MTU value
o
n interfaces (such as Ethernet) that have a default interface MTU value of 1580 or less.
The override keyword is not available for interface types that do not have a default MTU
value of 1580 or less.
bytes The MTU in bytes includes the label stack in the value.
Release Modification
11.1CT This command was introduced.
12.1(3)T This command was modified to incorporate new MPLS terminology.
12.2(25)S The command changed the maximum allowable MPLS MTU values. See the
“
Usage Guidelines for Cisco IOS Release 12.2(25)S” section for more
i
nformation.
12.2(27)SBC The command changed so that you cannot set the MPLS MTU value larger
th
an the interface MTU value. The override keyword was introduced. See
the “Usage Guidelines for Cisco IOS Release 12.2(27)SBC, 12.2(33)SRA,
12.4(11)T, 12.2(33)SXH, and Later Releases” section for more information.
12.(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.4(11)T This command was integrated into Cisco IOS Release 12.4(11)T.
12.2(33)SXH This command was integrated into Cisco IOS Release 12.2(33)SXH.
12.2(33)SCA This command was integrated into Cisco IOS Release 12.2(33)SCA.