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14-6
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 14 Configuring Layer 3 Virtualization
Prerequisites for VRF
Prerequisites for VRF
VRFs have the following prerequisites:
• You must install the Advanced Services license to use VDCs besides the default VDC.
Guidelines and Limitations
VRFs have the following guidelines and limitations:
• When you make an interface a member of an existing VRF, Cisco NX-OS removes all layer 3
configuration. You should configure all layer 3 parameters after adding an interface to a VRF.
• You should add the mgmt0 interface to the management VRF and configure the mgmt0 IP address
and other parameters after you add it to the management VRF.
• If you configure an interface for a VRF before the VRF exists, the interface is operationally down
until you create the VRF.
• Cisco NX-OS creates the default and management VRFs by default. You should make the mgmt0
interface a member of the management VRF.
• The write erase boot command does not remove the management VRF configuration. You must use
the write erase command and then the write erase boot command.
Configuring VRFs
This section contains the following topics:
• Creating a VRF, page 14-6
• Assigning VRF Membership to an Interface, page 14-8
• Configuring VRF Parameters for a Routing Protocol, page 14-9
• Configuring a VRF-Aware Service, page 14-11
• Setting the VRF Scope, page 14-12
Note If you are familiar with the Cisco IOS CLI, be aware that the Cisco NX-OS commands for this feature
might differ from the Cisco IOS commands that you would use.
Creating a VRF
You can create a VRF in a VDC.
BEFORE YOU BEGIN
Ensure that you are in the correct VDC (or use the switchto vdc command).
SUMMARY STEPS
1. config t
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