Configuring VRF-lite

Configuring VRF-lite

The following section describes the generic commands used to configure VRF-lite.

CONFIGURING ACLS

PURPOSE

 

 

 

 

 

Step 1

awplus# conf t

Enter Global Configuration mode.

 

 

 

 

 

Step 2

awplus(config)# access-list standard

Optional. This command configures a standard

 

 

<access-list-name> {deny

named access-control-list (ACL). Matching

 

 

permit}<network>

networks (routes) are either imported to or

 

 

 

exported from a VRF instance to BGP.

 

 

 

Alternatively, matching networks are denied

 

 

 

from being imported to or exported from a

 

 

 

VRF instance to BGP. This command is

 

 

 

optionally used in the context of VRF when

 

 

 

using BGP to facilitate inter-VRF

 

 

 

communications. These optional ACLs should

 

 

 

be configured before any inter-VRF

 

 

 

communication is configured, to prevent

 

 

 

unnecessary routes from being leaked from one

 

 

 

VRF to another.

 

 

 

 

 

CONFIGURING VRFS

PURPOSE

 

 

 

 

 

Step 1

awplus(config)#ip vrf <vrf-name><lo-

Create a named Virtual Router Forwarding

 

 

interface-number>

(VRF) instance. If the optional Local Interface

 

 

 

(LO) parameter not specified, a local interface is

 

 

 

automatically created and associated with the

 

 

 

VRF instance. If the LO parameter is specified, it

 

 

 

allows the user to control which LO is

 

 

 

associated with a particular VRF instance.

 

 

 

 

 

Step 2

awplus(config-vrf)#rd<route

Optional. Create a route distinguisher (rd) in

 

 

distinguisher>

the form of an ASN, which also references a

 

 

 

specific VRF instance. Format is in the form

 

 

 

ASN:VRF instance. This command is required if

 

 

 

using BGP to facilitate inter-VRF communication.

 

 

 

 

 

Step 3

awplus(config-vrf)#route-target export

Optional. Exports routes from the VRF instance

 

 

<ASN>

to BGP.

 

 

 

 

 

Step 4

awplus(config-vrf)#route-target import

Optional. Imports routes from BGP into the

 

 

<ASN>

VRF instance.

 

 

 

 

 

Step 5

awplus(config-vrf)#import map <route-

Optional. Configure an import map, which

 

 

map-name>

references a route map, and associated ACL.

 

 

 

Used to selectively import routes into the VRF

 

 

 

instance from BGP.

 

 

 

 

 

Step 6

awplus(config-vrf)#export map <route-

Optional. Configure an export map, which

 

 

map-name>

references a route map, and associated ACL.

 

 

 

Used to selectively export routes from the VRF

 

 

 

instance to BGP.

 

 

 

 

 

Step 7

awplus(config-vrf)#exit

Return to Global Configuration mode.

 

 

 

 

 

Configure VRF-lite Page 13

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Allied Telesis C613-16164-00 REV E manual Configuring VRF-lite, Awplusconfig# access-list standard

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