[c-nsp] EIGRP redistribution between 2 VRFs

[Oliver Boehmer (oboehmer)]

Jeff Kell <> wrote on Friday, February 15, 2008 2:46 PM:

> Michael Lyngbøl wrote:
>> On 14.02.2008 16:06:03 -0500, Luan Nguyen wrote:
>> 
>>> Say i have VRF RED one one of the interface, and VRF BLUE on another
>>> interface.  And i need to run EIGRP on both of them.  They have
>>> their own ASN and don't want to change them.  How do i send routes
>>> learned from RED into BLUE and vice versa?
> 
>> Import the proper route-targets in VRF RED and VRF BLUE.
>> You can also just import+export from/to one of the VRFs. Might need
>> to attach import/export maps to filter which routes you'd like to
>> import/export.
> 
> That's the general idea, but it's not quite that simple (I wish it
> was!).   Or at least I could not get it to actually work with
> import/export alone.
> 
> You must run iBGP for the import/export to actually work (at least on
> Catalyst hardware as CE/PE, IOS 12.2) and have iBGP redistributing
> your EIGRP instances, e.g.:
> 
>> router bgp 99999
>>  !
>>  address-family ipv4
>>  redistribute connected
>>  exit-address-family
>>  !
>>  address-family ipv4 vrf RED
>>  redistribute connected
>>  redistribute eigrp [reds-ASN]
>>  exit-address-family
>>  !
>>  address-family ipv4 vrf BLUE
>>  redistribute connected
>>  redistribute eigrp [blues-ASN]
>>  exit-address-family
> 
> If you subsequently want your red/blue EIGRP's to redistribute their
> respective imported routes further, you'll need to redistribute BGP
> within the EIGRP instances as well.
> 
> Of course if all this "extra stuff" is NOT needed, I'd love to hear
> about it.  It took the import/export plus mutual redistribution in my
> case to get it to work as desired, and I ran out of patience before
> trying to selective remove bits here and there to see which ones were
> NOT part of the solution.

You are doing the right thing, you need to enable BGP (no neighbors needed) as import/export is only possible via BGP. Don't think you need the "redist connected" within ipv4-AF (the first address-family), but the rest is fine and required for this to work.

	oli