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Cisco ME 3800X and ME 3600X Switch Command Reference
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Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
mtu
mtu
To set the maximum packet size or maximum transmission unit (MTU) size for an interface, use the mtu
command in interface configuration mode. To return to the default value, use the no form of this
command.
mtu bytes
no mtu bytes
Syntax Description
Defaults The default maximum transmission unit (MTU) size for frames received and sent on all interfaces on the
switch is 1500 bytes.
Command Modes Interface configuration
Command History
Usage Guidelines When you use this command to change the MTU size on an interface, it is not necessary to reset the
switch before the new configuration takes effect.
Because the switch does not fragment Layer 2 packets, it drops switched Layer 2 packets larger than the
packet size supported on the egress interface.
Examples This example shows how to set the maximum packet size for a port to 1800 bytes:
Switch(config)# interface gigabitethernet 0/1
Switch(config-if)# mtu 1800
Switch(config)# exit
Related Commands
bytes Set the system MTU for the interface. The range is from 1500 to 9800 bytes.
The default is 1500.
Release Modification
12.2(52)EY This command was introduced.
Command Description
show interface [interface-id] mtu Displays the MTU size for all interfaces or for the
specified interface.