Administrator Guide

Layer 3 Routing Commands 1886

Virtual Router Commands

Dell Networking N3000/N4000 Series Switches

Dell Networking VRF is an implementation of Virtual Routing and

Forwarding (VRF). Virtual Routing and Forwarding allows multiple

independent instances for the forwarding plane to exist simultaneously. This

allows the administrator to segment the network without incurring the costs

of multiple routers. Each VRF operates as an independent VPN. The IP

addresses assigned to each VPN may overlap. Static route leaking to and from

the global instance is supported. VRF associated VLANs may not overlap with

other VRF instances. Dell Networking N4000 Series switches support up to

64 virtual forwarding instances in addition to the default global instances.

Dell Networking N3000 series switches support up to 16 VRFs.

The following capabilities are supported for Dell Networking VRFs:

• Static routing (including route leaking)

•OSPF (IPv4 only)

•ARP

•Ping

• VRRP

• Trace route

• DHCP relay (IP helper)

• ICMP echo reply configuration

• ICMP error interval configuration

VRF configuration follows the same configuration steps as the default routing

instance with two additional steps: creating the VRF instance and associating

VLANs to the instance. Existing commands that have been enabled for VRF

accept an additional VRF instance identifier (name). VRF names can be up

to 32 characters in length. If a VRF instance identifier is not used in the

command, it applies to the global routing instance by default.

To create a VRF and enable OSPF routing in the VRF:

Create the VLAN instances associated to the VRF. It is recommended that

a VLAN numbering scheme be developed to allow for future growth and to

assist in the easy recognition of which VLANs are associated to which

VRFs.

2CSNXXX_SWUM204.book Page 1886 Monday, January 25, 2016 1:25 PM