Configuring Multiple VRF Configuring VRF Instances
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 16-17
Assigning IP Interfaces to a VRF Instance
When a VRF instance is created or an existing instance is selected, any IP interface subsequently
configured is associated with that instance. For example, the following commands select the IpOne VRF
instance and configure an IP interface for that instance:
-> vrf IpOne
IpOne: -> ip interface intf100 address 100.1.1.1/24 vlan 100
IpOne: ->
Once an IP interface is associated with a VRF instance, Layer 3 traffic on that interface is routed within
the domain of the VRF instance. In other words, such traffic is only routed between other IP interfaces that
are associated with the same VRF instance. Any additional routing protocol traffic configured for that
same interface is also routed within the associated VRF domain.
Use the following guidelines when configuring IP interfaces for a VRF instance:
• A single IP interface as well as the VLAN associated with the interface, can only belong to one VRF
instance at a time.
• Once a VLAN is associated with a specific VRF instance, configuring an interface for that VLAN
within the context of any other instance, is not allowed. For example, if the first IP interface configured
for VLAN 100 was associated with the VRF IpOne instance, then any subsequent IP interface
configuration for VLAN 100 is only allowed within the context of the IpOne instance.
• A VRF instance can have multiple VLAN associations, even though a VLAN can only have one VRF
association.
Configuring Routing Protocols for a Specific VRF Instance
There are no additional CLI commands or parameters required to associate a routing protocol
configuration (for example, RIP, BGP, OSPF) with a specific VRF instance. Instead, the VRF CLI context
is used to determine the association between a specific routing configuration and a VRF instance. For
example, if a BGP routing instance is configured when VRF instance IpOne is the active CLI context, then
the BGP routing instance is associated with IpOne. All traffic for the BGP instance is routed and
forwarded on the interfaces associated with VRF IpOne.
For more information about the interaction of switch applications with VRF instances, see “VRF
Interaction With Other Features” on page 16-11. To see examples of configuring routing protocol
instances within the context of a VRF instance, refer to “Quick Steps for Configuring Multiple VRF” on
page 16-3.
Removing a VRF Instance
To remove a VRF instance from the switch configuration, use the no form of the vrf command. For
example:
-> no vrf IpTwo
To view a list of VRF instances configured on the switch, use the show vrf command. For more
information about this command, see the OmniSwitch AOS Release 8 CLI Reference Guide.
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