Cisco 4500M Command Reference

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Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
78-16201-01
Chapter2Cisco IOS Commands for the Catalyst 4500 Series Switches
mtu
mtu
To enable jumbo frames on an interface by adjusting the maximum size of a packet, or maximum
transmission unit (MTU), use the mtu command. To return to the default setting, use the no form of this
command.
mtu bytes
no mtu
Syntax Description
Defaults The default settings are as follows:
• Jumbo frames are disabled
• 1500 bytes for all ports
Command Modes Interface configuration mode
Command History
Usage Guidelines Jumbo frames are supported on non-blocking Gigabit Ethernet ports, switch virtual interfaces (SVI), and
EtherChannels. Jumbo frames are not available for stub-based ports.
The baby giants feature uses the global system mtu size command to set the global baby giant MTU. It
allows all stub-based ports interfaces to support Ethernet payload size of up to 1552 bytes.
Both the system mtu command and the per-interface mtu command work on interfaces that can support
jumbo frames, but the per-interface mtu command takes precedence.
Examples This example shows how to specify an MTU of 1800 bytes:
Switch(config)# interface GigabitEthernet 1/1
Switch(config-if)# mtu 1800
Related Commands system mtu
bytes Byte size; valid values are from 1500 to 9198.
Release Modification
12.1(13)EW Support for this command was introduced on the Catalyst4500 series switches.

Cisco 4500M Specifications

General

Brand	Cisco
Model	4500M
Category	Network Router
Language	English