System Mtu - Cisco WS-C2350-48TD-S Command Reference Manual

Chapter 2 Catalyst 2350 Cisco IOS Commands

system mtu

Use the system mtu global configuration command to set the maximum packet size or maximum
transmission unit (MTU) size for Gigabit Ethernet (10/100/1000) ports, or for 10-Gigabit ports, or for
routed ports. Use the no form of this command to restore the global MTU value to its default value
Syntax Description
bytes
jumbo bytes
Defaults
The default MTU size for all ports is 1500 bytes.
The default value for the system routing MTU is the system MTU value.
Command Modes Global configuration
Command History Release
12.2(46)EY
Usage Guidelines The switch does not support the MTU on a per-interface basis.
If you enter the system mtu bytes global configuration command or the system mtu routing command
on the switch, the commands have no effect.
When you use the system mtu jumbo bytes command to change the system jumbo MTU size, you must
reset the switch before the new configuration takes effect.
The system MTU setting is saved in the switch environmental variable in NVRAM and becomes
effective when the switch reloads. The MTU settings that you enter with the system mtu jumbo
command are not saved in the switch Cisco IOS configuration file, even if you enter the copy
running-config startup-config privileged EXEC command. Therefore, if you use TFTP to configure a
new switch by using a backup configuration file and want the system MTU to be other than the default,
you must explicitly configure the system mtu jumbo settings on the new switch and then reload the
switch.
OL-19055-01
system mtu {bytes | jumbo bytes}
no system mtu [jumbo]
Change the MTU size for all Fast Ethernet interfaces.
Note
Set the system MTU for Gigabit Ethernet ports and 10-Gigabit Ethernet
ports. The system jumbo MTU is the maximum MTU received at the Gigabit
Ethernet and 10-Gigabit Ethernet ports.
The range is from 1500 to 9198 bytes.
Modification
This command was introduced.
This value does not apply to the Catalyst 2350 switch.
Catalyst 2350 Switch Command Reference
system mtu
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