Configuring The Mtu Size For An Ethernet Interface - Cisco Nexus 1000V Configuration Manual

Configuring the MTU Size for an Ethernet Interface

Step 4
Step 5
Step 6
This example shows how to set the port speed and duplex mode to Ethernet port 1 on module 3:
switch# configure terminal
switch(config)# interface ethernet 3/1
switch(config-if)# speed 1000
switch(config-if)# duplex full
switch(config-if)# show interface ethernet 3/1
switch(config-if)#
Configuring the MTU Size for an Ethernet Interface
You can configure the size of the maximum transmission unit (MTU) for a Layer 2 Ethernet interface.
Before You Begin
• Log in to the CLI in EXEC mode.
• Specify an MTU size between 1500 and 9000 bytes for an Ethernet interface.
• Make sure that the MTU value you set is supported by the VEM physical NIC. See your VMware
• Know that Jumbo frames are supported only on the vmxnet3 driver. Attempts to change the MTU appear
Cisco Nexus 1000V for VMware vSphere Interface Configuration Guide, Release 5.x
16
Command or Action
switch(config-if)# duplex {full |
half | auto}
switch(config-if)# show interface
interface
switch(config-if)# copy
running-config startup-config
documentation for more information about supported MTU for physical NICs.
to succeed but the adapter always drops frames larger than 1500 bytes. For more information, see the
VMware KB article http://kb.vmware.com/selfservice/microsites/search.do?language=en_
US&cmd=displayKC&externalId=1015556
Purpose
• For Ethernet ports on the 48-port, 10/100/1000 modules,
sets the speed at 10 Mbps, 100 Mbps, or 1000 Mbps,
or sets the port to automatically negotiate its speed with
the other 10/100/1000 port on the same link.
• For Ethernet ports on the 32-port, 10-Gigabit Ethernet
modules, sets the speed at 10,000 Mbps (10 Gbps) or
sets the port to automatically negotiate its speed with
the other 10-Gigabit Ethernet port on the link.
• For management interfaces, sets the speed as 1000
Mbps or sets the port to autonegotiate its speed.
Specifies the duplex mode as full, half, or autonegotiate.
(Optional)
(Optional) Displays the interface configuration.
(Optional)
Saves the change persistently through reboots and restarts
by copying the running configuration to the startup
configuration.
Configuring Interface Parameters