Cisco Catalyst 2960 Command Reference Manual page 597

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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands

For example, if the system mtu value is 1998 bytes and the system mtu jumbo value is 5000 bytes,

packets up to 5000 bytes can be received on interfaces operating at 1000 Mb/s. However, although a

packet larger than 1998 bytes can be received on an interface operating at 1000 Mb/s, if its destination

interface is operating at 10 or 100 Mb/s, the packet is dropped.

This example shows how to set the maximum jumbo packet size for Gigabit Ethernet ports operating at

1000 Mb/s or greater to 1800 bytes:

Switch(config)# system mtu jumbo 1800

Switch(config)# exit

Switch# reload

You can verify your setting by entering the show system mtu privileged EXEC command.

Related Commands

show system mtu

Displays the packet size set for Fast Ethernet and Gigabit

Ethernet ports.

Catalyst 2960 Switch Command Reference