static interface
A static interface is configured manually on the switch and the adapter. A static virtual adapter can be
a vNIC or a virtual host adapter bus (vHBA). A static interface can be a vEthernet or a virtual Fibre
Channel (vFC) interface bound to a static vEthernet interface.
In one method of creating a static vEthernet, the network administrator assigns a channel number
(equivalent to a VN-Tag or prestandard IEEE 802.1BR tag number) to the vEthernet. The server
administrator must be sure to define a vNIC on the adapter with the same channel number.
In another method, the network administrator can create a static floating vEthernet by configuring the
vEthernet with a virtual switching instance (VSI) MAC address and DVPort ID.
floating vEthernet interface
In a hypervisor environment, each vNIC on the network adapter is associated with one virtual machine
(VM). VMs can migrate from one physical server to another. A virtual interface that migrates with a
VM and virtual network link is called a floating vEthernet interface.
fixed vEthernet interface
A fixed vEthernet interface is a virtual interface that does not support migration across physical interfaces.
For fixed vEthernet (static or dynamic), an administrator can change configurations at any time. The
binding of the vEthernet interface number to a channel number is persistent unless the administrator
changes it.
Licensing Requirements for VM-FEX
The following table shows the licensing requirements for this feature:
License Requirement
Product
A VM-FEX license is required for each Cisco Nexus device. The license package
name is VMFEX_ FEATURE_PKG. A grace period of 120 days starts when
you first configure the licensed feature.
For a complete explanation of the Cisco NX-OS licensing scheme and how to
obtain and apply licenses, see the
Cisco NX-OS Licensing Guide
.
Cisco NX-OS
Default Settings for VM-FEX
The following table lists the default settings for parameters that are relevant to VM-FEX:
Default
Parameters
Disabled
Virtualization feature set
Disabled
FEX
Disabled
VM-FEX
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Configuring VM-FEX
Licensing Requirements for VM-FEX
