Re: MPLS EIGRP backdoor links - SoO

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/s_mvesoo.html

See the section on "Verifying the Configuration of the SoO Extended
Community"

SoO is a BGP ext community and is set in BGP. When EBGP is used between PE
& CE the SOO attribute is configured via a route-map.. For other routing
protocols the SoO attribute can be applied to routes learned through a
particular VRF instance during the re-distribution into BGP.. I don't
think the IGP has any knowledge since it's just a BGP ext. community that
is used for loop prevention.

Hope that helps.

Christian Hunter

On Tue, Nov 1, 2011 at 3:14 PM, Tom Kacprzynski <tom.kac_at_gmail.com> wrote:

> Hello,
> I'm working on a lab using EIGRP as the protocol for MPLS VPN. This
> scenario has a backdoor link. I'm testing the Site of Origin feature, but
> can't seem to find any way to check the actual SoO on the CE router using
> EIGRP commands. Does anyone know how/if I could do that?
>
> I can see it in BGP table but how do I see it in EIGRP
>
> Rack1R6#sh ip bgp vpnv4 rd 100:1 155.1.67.0/24
> BGP routing table entry for 100:1:155.1.67.0/24, version 338
> Paths: (1 available, best #1, table VPN-A)
> Advertised to update-groups:
> 1
> Local
> 0.0.0.0 from 0.0.0.0 (150.1.6.6)
> Origin incomplete, metric 0, localpref 100, weight 32768, valid,
> sourced, best
> Extended Community: SoO:100:60 RT:100:1
> Cost:pre-bestpath:128:28160 <----------------------
> 0x8800:32768:0 0x8801:10:2560 0x8802:65280:25600 0x8803:65281:1500
> mpls labels in/out 22/nolabel(VPN-A)
>
>
>
> Thank you,
>
> Tom
>
>
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Received on Tue Nov 01 2011 - 16:08:39 ART