Avoiding routes being tagged as 'unreachable' when building a route-server / lg

[Madhuri]

Hi,

Try to configure "next hop self" for rr clients in route reflector config.




Thanks,
Madhuri

On Sat, Jul 25, 2015 at 5:19 PM, Paul S. <contact at winterei.se> wrote:

>  Hi guys,
>
> New BIRD user here, I'm trying to use bird to build a looking glass /
> route collector.
>
> All my core routers (I don't have a backbone network, so they run
> separately) are forwarding the full table by treating the bird system as a
> rr client. So far, this part of it works fine.
>
> The sessions are IBGP (and multihop by nature). My problem is the fact
> that bird classifies the routes as unreachable (as they indeed are, but I
> don't intend to use them to forward) and mentions this in the birdc lookups.
>
> A sample is given at the bottom, as well as the very simple config that
> I'm using right now (No tables, but I intend to set up tables per peer
> ('location') later)
>
> My question is how should I deal with this issue?
>
> bird> show route 8.8.8.0/24 all
> 8.8.8.0/24         unreachable [dfw_cr_0 07:39:20 from 10.1.13.1] *
> (100/-) [AS15169i]
>         Type: BGP unicast univ
>         BGP.origin: IGP
>         BGP.as_path: 3491 15169
>         BGP.next_hop: 63.218.23.65
>         BGP.local_pref: 400
>         BGP.community: (3491,2000) (3491,2001) (3491,15169)
>                    unreachable [syd_ocr_0 07:40:16 from 10.2.1.217]
> (100/-) [AS15169i]
>         Type: BGP unicast univ
>         BGP.origin: IGP
>         BGP.as_path: 15169
>         BGP.next_hop: 103.26.68.56
>         BGP.med: 0
>         BGP.local_pref: 106
>         BGP.community: (58941,0)
>                    unreachable [lax_ocr_0 07:39:26 from 10.3.14.1] (100/-)
> [AS15169i]
>         Type: BGP unicast univ
>         BGP.origin: IGP
>         BGP.as_path: 15169
>         BGP.next_hop: 206.72.210.41
>         BGP.med: 0
>         BGP.local_pref: 108
>         BGP.community: (19996,19996)
>                    unreachable [jfk_ocr_0 07:39:21 from 10.4.15.1] (100/-)
> [AS15169i]
>         Type: BGP unicast univ
>         BGP.origin: IGP
>         BGP.as_path: 174 15169
>         BGP.next_hop: 38.104.75.221
>         BGP.med: 10040
>         BGP.local_pref: 100
>         BGP.community: (174,21000) (174,22013)
>
>
> Current config, the macros have been removed for obvious reasons.
>
> log "/var/log/bird.log" all;
>
> router id r_id;
>
>
> protocol device { }
>
> template bgp peers {
>        local as myas;
>        multihop;
>        import all;
>        export none;
> }
>
> protocol bgp syd_ocr_0 from peers
> {
>     description "Sydney Open Core 0";
>     neighbor syd_ocr_0_ip as peeras;
>     password syd_ocr_0_password;
> }
>
> protocol bgp lax_ocr_0 from peers
> {
>     description "Los Angeles Open Core 0";
>     neighbor lax_ocr_0_ip as peeras;
>     password lax_ocr_0_password;
> }
>
> protocol bgp jfk_ocr_0 from peers
> {
>     description "New York Open Core 0";
>     neighbor jfk_ocr_0_ip as peeras;
>     password jfk_ocr_0_password;
> }
>
> protocol bgp dfw_ocr_0 from peers
> {
>     description "Dallas Open Core 0";
>     neighbor dfw_ocr_0_ip as peeras;
>     password dfw_ocr_0_password;
> }
>
>
>
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