Cisco WS-C3560E-24PD-E User Manual

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Catalyst 3560 Switch Command Reference
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Chapter 2 Catalyst 3560 Switch Cisco IOS Commands
system mtu
system mtu
Use the system mtu global configuration command to set the maximum packet size or maximum
transmission unit (MTU) size for Gigabit Ethernet ports, for routed ports, or for Fast Ethernet (10/100)
ports. Use the no form of this command to restore the global MTU value to its default value.
system mtu {bytes | jumbo bytes | routing bytes}
no system mtu
Syntax Description
Defaults The default MTU size for all ports is 1500 bytes. However, if you configure a different value for the
system MTU, that configured value becomes the default MTU size for routed ports when it is applied
following a switch reset.
Command Modes Global configuration
Command History
Usage Guidelines When you use this command to change the system MTU or jumbo MTU size, you must reset the switch
before the new configuration takes effect.The system mtu routing command does not require a switch
reset to take effect.
Gigabit Ethernet ports operating at 1000 Mbps are not affected by the system mtu command, and
10/100-Mbps ports are not affected by the system mtu jumbo command.
You can use the system mtu routing command to configure the MTU size on routed ports.
bytes Set the system MTU for ports that are set to 10 or 100 Mbps. The range
is 1500 to 1998 bytes. This is the maximum MTU received at 10/100-Mbps
Ethernet switch ports.
jumbo bytes Set the system jumbo MTU for Gigabit Ethernet ports operating at 1000
Mbps or greater. The range is 1500 to 9000 bytes. This is the maximum MTU
received at the physical port for Gigabit Ethernet ports.
routing bytes Set the maximum MTU for routed packets. You can also set the maximum
MTU to be advertised by the routing protocols that support the configured
MTU size. The range is 1500 bytes to the system MTU value. The system
routing MTU is the maximum MTU for routed packets and is also the
maximum MTU that the switch advertises in routing updates for protocols
such as OSPF.
Release Modification
12.1(19)EA1 This command was introduced.
12.2(25)SEC The bytes range is now 1500 to 1998.
12.2(25)SED The routing bytes keywords were added.

Cisco WS-C3560E-24PD-E Specifications

General

Brand	Cisco
Model	WS-C3560E-24PD-E
Category	Switch
Language	English