Show Vlan Mtu - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

show vlan mtu

To display the minimum and maximum transmission unit (MTU) sizes of each VLAN, use the show vlan
mtu command.
Syntax Description This command has no arguments or keywords
Defaults
This command has no default settings.
Command Modes
Privileged EXEC mode
Command History Release
12.1(13)EW
Usage Guidelines
The MTU_Mismatch column in the command output indicates whether all the ports in the VLAN have
the same MTU. When "yes" is displayed in the MTU_Mismatch column, it means that the VLAN has a
port with different MTUs, and packets might be dropped that are switched from a port with a larger MTU
to a port with a smaller MTU. If the VLAN does not have an SVI, the hyphen (-) symbol is displayed in
the SVI_MTU column.
For a VLAN, if the MTU-Mismatch column displays "yes," the names of the port with the MinMTU and
the port with the MaxMTU are displayed. For a VLAN, if the SVI_MTU is bigger than the MinMTU,
"TooBig" is displayed after the SVI_MTU.
Examples This is an example of output from the show vlan mtu command:
Switch# show vlan mtu
VLAN
---- ------------- -------------
1
Switch>
Related Commands Command
mtu
OL-27596 -01
show vlan mtu
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
SVI_MTU MinMTU(port)
1500 1500
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
MaxMTU(port) MTU_Mismatch
------------ ------------
1500 No
Description
Enables jumbo frames on an interface by adjusting the
maximum size of a packet or maximum transmission unit
(MTU).
show vlan mtu
2-959