The default maximum
transmission unit (MTU) size for frames received and transmitted on all
interfaces is 1500 bytes. You can increase the MTU size for all interfaces
operating at 10 or 100 Mb/s by using the
global configuration command. You can increase the MTU size to support jumbo
frames on all Gigabit Ethernet interfaces by using the
system mtu jumbo
global configuration command.
Gigabit Ethernet ports are not affected by the system mtu
command; 10/100 ports are not affected by the system mtu jumbo command. If you
do not configure the system mtu jumbo command, the setting of the system mtu
command applies to all Gigabit Ethernet interfaces.
You cannot set the MTU size for an individual interface; you set
it for all 10/100 or all Gigabit Ethernet interfaces. When you change the
system or jumbo MTU size, you must reset the switch before the new
configuration takes effect.