[c-nsp] eigrp on pe-ce with backdoor link

[BALLA Attila]

So I read again the release-notes...
It sais, that the 12.0(27)S introduces this pre-bestpath community, and it 
carris the eigrp route type and metric.
I had a misconfiguration, I set redistribute connected under bgp, after 
eliminating this the connected routes have eigrp type and metric.
But this _automatic_ pre-bestpath setting is under 12.0(27)S only, and 
12.2(S) knows this pre-bestpath, but it is not automatic...
Am I right?

Attila

On Wed, 2 Feb 2005, BALLA Attila wrote:

> Hi,
>
>   I have a test network with three 7200 routers (PE1, PE2 and PE3), they
> are connected to each other via FastEthernet. PExs form an MPLS core, and
> PE2 is a route-reflector.
>   CE1 and CE2 is connected to PE1 via serial link.
>   CE3 is connected to PE2 via serial link.
>   There is a backdoor Ethernet segment between the CExs, with high delay
> and low bandwidth parameters, so the Serial link would be the preffered
> uplink.
>   There is a connected LAN segment and a Loopback at PE3.
>   These are in the same VRF, and we use EIGRP on PE-CE.
>
>
>   If I use 12.0(27)S4 on the PEx routers, then everything is working
> properly. Only the convergence is slow (about 3 minutes)
>   But we would like to use npe-g1 also, and 12.0S doesn't support it...
>
>   And if we use 12.2(25)S2 for example on PE3, then we get a great routing
> loop. PE2 sees the PE3's Loopback toward CE3 router, and CE3 sees it
> toward CE2 and so on...
>
>   I think the problem is around the bgp best-path selection, and cost
> community.
>   I read the config guide on cco about 12.0(27)S and it sais there are no
> configuration required... (which is true with this release but 12.2(25)S)
>   I don't use any special thing: I don't use SOO, because I don't want to
> upgrade to CExs, and I do only redistribute eigrp routes into bgp (with
> redistribute eigrp 1) and redistribute bgp routes into eigrp
> address-family (with redistrubite bgp <as> 100000 100 255 1 1500)
>
>   Does anybody have a similar scenario? How do you configure properly this
> bgp cost community?
>
> Best Regards:
>   Attila
>
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