Administrator Guide

Table Of Contents
Related
Commands
show ip route — views the switch routing table.
show ipv6 route — displays the IPv6 routes.
ip mtu
Set the IP MTU (frame size) of the packet the RPM transmits for the line card interface. If the packet must
be fragmented, Dell Networking OS sets the size of the fragmented packets to the size specified in this
command.
Syntax
ip mtu value
To return to the default IP MTU value, use the no ip mtu command.
Parameters
value Enter the maximum MTU size if the IP packet is fragmented.
The range is from 576 to 9234. The default is 1500 bytes.
Defaults 1500 bytes
Command
Modes
INTERFACE (Gigabit Ethernet and 10-Gigabit Ethernet interfaces)
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version
8.3.19.0
Introduced on the S4820T.
Version 8.3.7.0 Introduced on the S4810.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
pre-Version
6.1.1.0
Introduced on the E-Series.
Usage
Information
When you enter the no mtu command, Dell Networking OS reduces the ip mtu
value to 1536 bytes. To return the IP MTU value to the default, use the no ip mtu
command.
Starting with Dell Networking OS Release 9.2(0.2), the ip mtu command is not
supported to configure the IP MTU value that is used when the IP packet is
fragmented. Instead of having to configure the IP MTU value, this value is
automatically computed by the software when you configure an interface. As a
result, the ip mtu command is not available for configuration. However, you can
continue to specify the link MTU value by using the mtu command.
Compensate for Layer 2 header when configuring link MTU on an Ethernet
interface or Dell Networking OS may not fragment packets. If the packet includes a
746
IPv4 Routing