Cisco Catalyst 3560-X Software Configuration Manual page 447

Chapter 1 Configuring Interface Characteristics
Command
Step 4
system mtu bytes
Step 5 end
Step 6 copy running-config startup-config
Step 7
reload
Step 8 show system mtu
If you enter a value that is outside the allowed range for the specific type of interface, the value is not
accepted.
This example shows how to set the maximum packet size for a Gigabit Ethernet port to 7500 bytes:
Switch(config)# system mtu jumbo 7500
Switch(config)# exit
Switch# reload
This example shows the response when you try to set Gigabit Ethernet interfaces to an out-of-range
number:
Switch(config)# system mtu jumbo 25000
% Invalid input detected at '^' marker.
OL-25303-03
Purpose
(Optional) In a mixed hardware stack, change the MTU
size for all Fast Ethernet interfaces on the Catalyst 3750
members.
The range is 1500 to 1998 bytes; the default is
1500 bytes.
This command does not apply to
Note
Catalyst 3560-X switches.
Returns to privileged EXEC mode.
Saves your entries in the configuration file.
Reloads the operating system.
Verifies your settings.
^
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Configuring the System MTU
1-45