6.0

Enable Jumbo Frames on a vSphere Distributed Switch
Enable a vSphere distributed switch for jumbo frames by changing the MTU size for that distributed switch.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
1 Log in to the vSphere Client and select the Networking inventory view.
2 Right-click the vSphere distributed switch in the inventory pane, and select Edit Settings.
3 On the Properties tab, select Advanced.
4 Set the Maximum MTU to the largest MTU size among all the virtual network adapters connected to
the vSphere distributed switch, and click OK.
Enable Jumbo Frame Support on a Virtual Machine
Enabling jumbo frame support on a virtual machine requires an enhanced vmxnet adapter for that virtual
machine.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
1 Log in to the vSphere Client and select the virtual machine from the inventory panel.
2 Click the Summary tab, and click Edit Settings.
3 Select the network adapter from the Hardware list.
4 Record the network settings and MAC address that the network adapter is using.
5 Click Remove to remove the network adapter from the virtual machine.
6 Click Add.
7 Select Ethernet Adapter and click Next.
8 In the Adapter Type group, select Enhanced vmxnet.
9 Select the network that the old network adapter was using and click Next.
10 Click Finish.
11 Select the new network adapter from the Hardware list.
12 Under MAC Address, select Manual, and enter the MAC address that the old network adapter was
using.
13 Click OK.
14 Check that the Enhanced vmxnet adapter is connected to a standard switch or distributed switch with
jumbo frames enabled.
15 Inside the guest operating system, configure the network adapter to allow jumbo frames.
See your guest operating system’s documentation for details.
16 Configure all physical switches and any physical or virtual machines to which this virtual machine
connects to support jumbo frames.
Chapter 21 Managing Network Resources
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