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3. For each VM, edit this file and add the following line for the OneConnect driver interface:
ethernet0.features="15"
4. To enable vmxnet emulation, add the following line for the OneConnect driver interface:
ethernet0.virtualDev="vmxnet"
5. Restart the VMs.
Steps 1 through 5 assume that eth0 is the interface added to the VM from the OneConnect Network.
Note: The use of vmx NIC emulation requires VMware Tools to be installed in the guest
operating systems. For information on installing VMware Tools in a Linux or Windows
guest operating system, refer to the VMware ESX Server 4.1 documentation.
Configuring a Virtual Switch to Use Jumbo Frames
To use jumbo frames, you must increase the MTU (Maximum Transmission Unit) size in the vSwitch and
also in the guest operating system. For the best performance, set the MTU to the maximum supported
by the OneConnect driver, which is 9000 bytes. This requires the MTU to be changed in the virtual
switch as well as the guest operating systems..
Note: You can configure TSO (TCP Segmentation Offload) and jumbo frames using the
vSphere client.
Setting the MTU Size in the vSwitch
To change the MTU to 9000, run the following command for each switch in the console operating
system:
esxcfg-vswitch vSwitch<N> -m 9000
where <N> is the number of the switch.
Setting the MTU Size for a Linux Guest Operating System
To set the MTU of the OneConnect driver interface in each Linux Guest operating system to 9000, run
the following command:
ifconfig eth<N> mtu 9000
where <N> is the number of the Ethernet interface on which you are working.
Setting the MTU Size for a Windows Guest Operating System
To set the MTU in each Windows guest operating system:
1. Go to the Start menu and select Control Panel > System.
2. Select the Hardware tab and open Device Manager.
3. Expand the Network Adapters heading.
4. Right click on the NIC, and select Properties.
5. Select the Advanced tab and set the MTU value.
Drivers for VMware ESX/ESXi 4.1 - Configuration Section
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