Setting The System Mtu - Cisco Nexus 1000V Troubleshooting Manual

Chapter 22 System

Setting the System MTU

Use this procedure to set a system MTU in your existing system uplink port profiles.
BEFORE YOU BEGIN
Before beginning this procedure, you must know or do the following:
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SUMMARY STEPS
1.
2.
3.
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5.
DETAILED STEPS
Command
Step 1
config t
Example:
switch# config t
switch(config)#
Step 2
port-profile name
Example:
switch(config)# port-profile AccessProf
switch(config-port-prof)#
Step 3
system mtu mtu-size
Example:
switch(config-port-prof)# system mtu 4000
switch(config-port-prof)#
OL-31593-01
You are logged in to the CLI in EXEC mode.
The system port profiles are already configured and you know the uplink profile names.
For more information, see the Cisco Nexus 1000V Port Profile Configuration Guide.
The MTU size you set for the system mtu on the port profile must be less than the size of the system
jumbomtu configured on the interface.
For more information about configuring MTU on the interface, see the Cisco Nexus 1000V Interface
Configuration Guide.
When you configure a system MTU on a system port profile, it takes precedence over an MTU you
may have configured on the interface.
To verify the ESX MTU settings for corresponding PNICs, use the ESXcfg-nics -l command.
config t
port-profile profilename
system mtu mtu value
show port-profile [brief | expand-interface | usage] [name profilename]
copy running-config startup-config
Description
Enters global configuration mode.
Enters port profile configuration mode for the named system
uplink port profile.
Designates the MTU size.
Must be an even number between 1500 and 9000.
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Must be less than the size of the system jumbomtu on
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the interface.
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
Connection Failure After ESX Reboot
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