Enterasys Matrix DFE-Gold Series User Manual

Enabling or Disabling the Path MTU Discovery Protocol show mtu
2-90 Startup and General Configuration
Enabling or Disabling the Path MTU Discovery Protocol
Purpose
ToenableordisablethepathMTU(MaximumTransmissionUnit)discoveryprotocolonthe
device.Becauseportswithtransmissionspeedshigherthan100Mbpsarecapableoftransmitting
framesuptoamaxim umof10,239bytes,itisnecessarytohavethepathMTUdiscoveryprotocol
enabledifjumboframesare
allowedinthenetwork.Ifthesystemreceivesaframelargerthanthe
destinationportsupports,itwillsendan“ICMPdestinationunreachable”errormessage
indicatingtothetransmittingstationthatitmustfragmenttheframe.
Commands
show mtu
UsethiscommandtodisplaythestatusofthepathMTUdiscoveryprotocolonthedevice.
Syntax
show mtu
Parameters
None.
Defaults
None.
Mode
Switchcommand,Read‐Only.
Example
ThisexampleshowshowtodisplaypathMTUdiscoverystatus:
Matrix(rw)->show mtu
MTU discovery status: Enabled
Note: By default, path MTU discovery is enabled on the device and jumbo frame support is disabled
on all ports. When jumbo frame support is enabled with the set port jumbo command, as described
in “set port jumbo” on page 4-28, path MTU discovery should not be disabled.
For information about... Refer to page...
show mtu 2-90
set mtu 2-91
clear mtu 2-91

Enterasys Matrix DFE-Gold Series Specifications

General

Brand	Enterasys
Model	Matrix DFE-Gold Series
Category	Switch
Language	English