Simple VRF-lite configuration examples

Simple VRF-lite configuration examples

The following section contains simple configuration examples to explain the basics of VRF-lite configuration used in conjunction with a variety of routing protocols.

Firstly, always create a clear VRF communication plan. This includes researching the various routing protocols and likely IP network plans for each VRF, and the likely content of each VRF routing table. Also confirm any overlapping IP address space requirements, and if there are any inter-VRF communication requirements.

Multiple VRFs without inter-VRF communication

The partial configuration example below shows the key components required to support multiple VRF instances with OSPF peering to external neighbors within each VRF instance. There is no inter-VRF communication used in this first example.

Two interfaces, vlan11 and vlan12 are configured for Customer1 (VRF red), and two other interfaces, vlan13 and vlan14 are configured for Customer2 (VRF green). In this example, overlapping IP addresses are used. OSPF is used as the routing protocol within each VRF instance.

 

 

PC3

 

 

PC4

 

R3

 

VRF

13

 

vlan

 

 

R4

 

11

14

 

vlan

R1

vlan

 

12

Customer2 (VRF green)

 

 

vlan

 

 

R2

PC1

 

 

PC2

 

 

Customer1 (VRF red)

 

...

!

ip vrf red description Customer1

!

ip vrf green description Customer2

!

interface vlan11

ip vrf forwarding red ip address 10.1.1.1/24[cont...]

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Allied Telesis C613-16164-00 REV E Simple VRF-lite configuration examples, Multiple VRFs without inter-VRF communication

C613-16164-00 REV E specifications

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