I'm trying to enable Jumbo Frames on a ESX 3.5.0 server.
I've setup Jumbo Frames on the vSwitch, now I need to do the port group. I've attempted to create a new port group and set the MTU to 9000 using the following syntax: esxcfg-vmknic -a -i -n -m 9000 "iSCSI Net B"
I'm pretty sure the syntax is correct but i receive a message stating "Error performing operation: Unable to find a PortGroup with the Name iSCSI Net B".
I thought the idea was that you had to create the port group as jumbo frames could not be set on an exising port group. This error makes it look like it's looking for an existing port group. I tried running the command on an existing port group and got the same message.
At this stage I'm stuck so any assistance would be greatly appreciated. Any ideas?
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Tom Howarth VCP / vExpert
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Look in page 2 of the comments for the step by step.
My guess? You don't have a space between "-m 9000" and your portgroup name. Wrapping in the console caused me to do this a couple of times myself.
Shane Wendel, VCP
Here's how I got it to work on vSphere. My virtual switch is vSwitch1 and my kernal port is VM-iSCSI
I paused all the VM's running off the iSCSI SAN (OpenFiler). I previously configured OpenFiler for Jumbo Frames and the Dell switch.
Delete the VMKernal port from the vSphere client "GUI"
You will need to SSH to the console and change to SU "Super User" then you can execute:
esxcfg-vswitch -m 9000 vSwitch1
esxcfg-vswitch -A "VM-iSCSI" vSwitch1
esxcfg-vmknic -a "VM-iSCSI" -i 192.168.1.49 -n 255.255.255.0 -m 9000
Run: esxcfg-vmnic -l
Interface Port Group/DVPort IP Family IP Address Netmask Broadcast MAC Address MTU TSO MSS Enabled Type
vmk0 VM-iSCSI IPv4 192.168.1.49 255.255.255.0 192.168.1.255 00:50:FF:77:15:FF 9000 65535 true STATIC