ESXi

Hi all,

I was just wondering if the following would work for setting up jumbo frames.

I have 2 VMs on the same host, both are using vxnet 2 enhanced network adaptors and VMCI is enabled (so they both comunicate with each other).

If I set the MTU within each OS on the VM to use an MTU value of 9000, will this work? Or will I have to create a new vswitch set the MTU to 9000 and ensure the physical switch port is set to a MTU value of 9000.

I don't believe I will have to create a switch or set the physical switch value, but I maybe wrong.

Just so I don't forget, this is a app server that user connect to and run reports etc.

Jumbo Frame must be supported end to end and on each switch that they travel.

So be sure that vSwitch has a MTU=9000 (you can change from command line without delete it) and if the VM is on different hosts that also physical switch is well configured.

Andre

ok, but if the VMs are on the same host and using VMCI by setting the MTU on the OS (under device manager) I should be fine as this will keep the comms at the hypervisor level rather than going out onto the phyiscal network. My only concern is that users connect via a web browser to the app residing on the server and thus coms will go out onto the physical network.

If VMs are on the same portgroup on the same ESX than you only need that vSwitch has MTU=9000 and both vNIC are setted for jumbo frames.

Andre