[rbak-nsp] Inter-context routing

[jim at scusting.com]

Thanks - that got the BGP up.  I have now setup the contexts as 
route-reflector clients and I'm now having issues with the routes which 
the context announces onto another device.

---------------------------------
context BLAH-L06
  interface loop0 loopback
  ip address 10.0.4.5/32

 router bgp 65100
  peer-group WBS internal
   next-hop-self
   address-family ipv4 unicast
    route-map Routes_to_WBS out

  neighbor 10.0.3.83 internal
   peer-group WBS
---------------------------------

Now if I go to 10.0.3.83 and look at a route received from BLAH-L06 
which originated in context BLAH-L05 I see:

lon-gs1wbs#sh ip bgp 10.0.1.205
BGP routing table entry for 10.0.1.205/32, version 114
Paths: (1 available, no best path)
Flag: 0x820
  Not advertised to any peer
  Local
    10.0.4.5 (inaccessible) from 10.0.3.88 (10.0.4.6)
      Origin incomplete, metric 0, localpref 100, valid, internal
      Originator: 10.0.4.5, Cluster list: 10.0.4.6

Why is context BLAH-L06 announcing this route with a next hop of 
10.0.4.5 which is in context  BLAH-L05?  The peer-group is setup with 
'next-hop-self' so should that not mean it should announce the route 
with itself as the nexthop - ie 10.0.4.6 (or the physical IP 10.0.3.88) ?

Thanks,.

Jim.


David Freedman wrote:
>
> You should explicitly set the update-source for ibgp, ensure you have 
> "update-source loop0" or somesuch in your bgp neighbor config
>
> ------------------------------------------------
> David Freedman
> Group Network Engineering
> Claranet Limited
> http://www.clara.net
>
>
>
> -----Original Message-----
> From: redback-nsp-bounces at puck.nether.net on behalf of Jim TEST
> Sent: Thu 1/7/2010 10:13
> To: redback-nsp at puck.nether.net
> Subject: [rbak-nsp] Inter-context routing
>
> Hi,
>
> I'm trying to setup some intercontext routing which seems to work with
> the statics but I'm unable to get BGP running between the 2 contexts,
> I'm sure I had this working like this before..
>
> Here is what I have:
>
> -------------------------------------------------------
> context BLAH-L05
>  interface loop0 loopback
>   ip address 10.0.4.5/32
>
>  router bgp 65100
>   router-id 10.0.4.5
>   address-family ipv4 unicast
>    redistribute connected
>    redistribute static
>
>   neighbor 10.0.4.6 internal
>    next-hop-self
>    address-family ipv4 unicast
>   
>  ip route 10.0.4.6/32 context BLAH-L06
>
> -------------------------------------------------------
> context BLAH-L06
>  interface loop0 loopback
>   ip address 10.0.4.6/32
>
>  router bgp 65100
>   router-id 10.0.4.6
>   address-family ipv4 unicast
>    redistribute connected
>    redistribute static
>
>   neighbor 10.0.4.5 internal
>    next-hop-self
>    address-family ipv4 unicast
>    
>  ip route 10.0.4.5/32 context BLAH-L05
>  -------------------------------------------------------
>
> Am I missing something obvious?  I can ping between contexts using the
> loopbacks so they can see each other, but BGP just sits in Idle or
> Connect in either context and I'm not seeing any errors.  Am I missing
> something silly here?  I had BGP working between contexts before and I'm
> sure it was a very simple setup like this?
>
> Thanks.
>
> Jim.
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