Specifications

mtu
MP-359
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
mtu
To adjust the maximum packet size or maximum transmission unit (MTU) size, use the mtu command
in interface configuration mode, connect configuration submode, or xconnect subinterface configuration
mode. To restore the MTU value to its original default value, use the no form of this command.
mtu by
tes
no mtu
Syntax Description
Defaults Table 11 li
sts default MTU values according to media type.
Command Modes Interface configuration (config-if)
Connect configuration submode (for Frame Relay Layer 2 interworking)
xconnect subinterface configuration (config-if-xconn)
Command History
bytes MTU size, in bytes.
Ta b l e 11 Default Media MTU Values
Media Type Default MTU (Bytes)
Ethernet 1500
Serial 1500
Token Ring 4464
ATM 4470
FDDI 4470
HSSI (HSA) 4470
Release Modification
10.0 This command was introduced.
12.0(26)S This command was modified. This command was updated to support connect
c
onfiguration submode for Frame Relay Layer 2 interworking.
12.2(14)SX This command was integrated into Cisco IOS Release 12.2(14)SX. Support
f
or this command was introduced on the Supervisor Engine 720.
12.2(17d)SXB This command was integrated into Cisco IOS Release 12.2(17d)SXB.
Su
pport for this command on the Supervisor Engine 2 was extended to the
12
.2SX release.
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.