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VMware ESX Server Administration Guide
When you choose a network connection for a virtual machine, ESX Server links it to
the associated virtual switch. The operation of the virtual machine depends on the
configuration of its network connection. Thus, you cannot bind or detach physical
adapters while a virtual switch is being used by a virtual machine.
You can bind up to ten physical adapters to each virtual switch.
Finding Bonds and Adapters in the Service Console
When you bind together adapters in a virtual switch, ESX Server assigns a bond
number identifying the new logical grouping of physical adapters. You will need to
know the bond number in order to configure the bond options described below.
Check /etc/vmware/netmap.conf to determine the bond number assigned to
a virtual switch.
You may also need to know the device name ESX Server assigns to a physical adapter.
Certain options use the device name to designate a specific adapter. ESX Server
defines device names with the string vmnic<n>, for which <n> is the same adapter
number displayed for an adapter in the Management Interface. For example, the
physical adapter identified as Outbound Adapter 1 would have the device name
vmnic1.
You can also determine the device name by searching /etc/vmware/
devnames.conf for the name definition. Note the PCI bus address of the adapter
in the Management Interface and search for the corresponding name definition. For
example, to find the device name for the adapter at PCI 2:4.0:
1. Log into the Service Console.
2. Search /etc/vmware/devnames.conf:
$ grep 2:04.0 /etc/vmware/devnames.conf
002:04.0 nic vmnic0
The device name is vmnic0.
Creating a Virtual Switch
You can find basic instructions for creating and modifying virtual switches in
Changing Network Connections on page 219.
Note: The configuration options described below are used for optimizing virtual
switches for complex operating conditions. You can create and use a virtual switch
without changing these options for most configurations.