Specifications

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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 11 Configuring Layer 3 Virtualization
Default Settings
• VRF-lite does not support all MPLS-VRF functionality; it does not support label exchange, LDP
adjacency, or labeled packets.
• Multiple virtual Layer 3 interfaces can be connected to a VRF-lite switch.
• The switch supports configuring a VRF by using physical ports, VLAN SVIs, or a combination of
both. The SVIs can be connected through an access port or a trunk port.
• The Layer 3 TCAM resource is shared between all VRFs. To ensure that any one VRF has sufficient
CAM space, use the maximum routes command.
• The total number of routes supported by all the VRF's is limited by the size of the TCAM.
• VRF-lite supports BGP, RIP, and static routing.
• VRF-lite does not support EIGRP.
• VRF-lite does not affect the packet switching rate.
• Multicast cannot be configured on the same Layer 3 interface at the same time.
• VRF-lite is supported only on an IPv4 network.
Default Settings
Table 11-1 lists the default settings for VRF parameters.
Configuring VRFs
This section contains the following topics:
• Creating a VRF, page 11-6
• Assigning VRF Membership to an Interface, page 11-8
• Configuring VRF Parameters for a Routing Protocol, page 11-9
• Configuring a VRF-Aware Service, page 11-11
• Setting the VRF Scope, page 11-12
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 switch.
Table 11-1 Default VRF Parameters
Parameters Default
Configured VRFs default, management
routing context default VRF