[c-nsp] VRF-lite question on RD's

[ChrisSerafin]

I spoke too soon. I found this right after posting 
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/20ew/configuration/guide/vrf.pdf

Switch(config-vrf)# rd
route-distinguisher
Creates a VRF table by specifying a route distinguisher.
Enter either an AS number and an arbitrary number
(xxx:y) or an IP address and arbitrary number
(A.B.C.D:y).
Step 5 Switch(config-vrf)# route-target
{export | import | both}
route-target-ext-community
Creates a list of import, export, or import and export route
target communities for the specified VRF. Enter either an
AS system number and an arbitrary number (xxx:y) or an
IP address and an arbitrary number (A.B.C.D:y).
Note This command is effective only if BGP is running.
Step 6 Switch(config-vrf)# import map
route-map
(Optional) Associates a route map with the VRF.


I just added different numbers and they came right up.

THANKS!



Brandon Bennett wrote:
> My guess is they are doing vrf-lite and using frame-relay or dot1q to 
> bring these 3 VRFs to you.  Which means the RD (used for MPLS L3VPNs) 
> are only locally significant in the case of vrf-lite and are arbitrary 
> numbers.   It would be nice if Cisco didn't require RD's for vrf-lite 
> cause they service no purpose.
>
> Now the import and export statements in vrf-lite also serve no 
> purpose, but also not required.  Interesting that they exist in the 
> config.
>
> As long as no interfaces are configured with 'mpls ip'  and you don't 
> have a 'address-family vpnv4' configured under BGP those values are 
> meaningless outside of the local router.
>
> HTH,
>
> Brandon
>
> On Thu, Apr 2, 2009 at 9:59 AM, ChrisSerafin <chris at chrisserafin.com 
> <mailto:chris at chrisserafin.com>> wrote:
>
>     I have 3 VRF's on a CE router:
>
>
>
>     ip vrf xxx-General
>     rd 1:10
>     route-target export 1:10
>     route-target import 1:10
>     !
>     ip vrf xxx-Guest
>     rd 1:30
>     route-target export 1:30
>     route-target import 1:30
>     !
>     ip vrf xxx-Voice
>     rd 1:20
>     route-target export 1:20
>     route-target import 1:20
>
>     I just got 3 new VRF's from the ISP confgured, and I'm wondering
>     what numbers I need to have for the 'rd' and 'route-target xxport'
>     commands...? Are these arbitrary, come from the ISP, or can I just
>     use 40, 50, and 60?
>
>
>     Thanks,
>
>     chris
>
>
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