Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
show vlan m tu
show vlan mt u
To display the minimum and maximum transmission unit (MTU) sizes of each VLAN, use the show vlan
mtu command.
show vlan mtu
Syntax Description This command has no arguments or keywords
Defaults This command has no default settings.
Command Modes Privileged EXEC mode
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 s how vlan m tu command:
Switch# show vlan mtu
VLAN SVI_MTU MinMTU(port) MaxMTU(port) MTU_Mismatch
---- ------------- ------------- ------------ ------------
1 1500 1500 1500 No
Switch>
Related Commands Command Description
mtu Enables jumbo frames on an interface by adjusting the
maximum size of a packet or maximum transmission unit
(MTU).