[afnog] bgp-load sharing

[Peter Nyamukusa]

________________________________________
>From: afnog-bounces at afnog.org [mailto:afnog-bounces at afnog.org] On Behalf Of
>brunild KODJO
>Sent: Friday, April 11, 2008 1:36 PM
>To: afnog at afnog.org
>Subject: [afnog] bgp-load sharing
>
>
>Hi,
> 
>I have a problem configuring a kind of load sharing.
> 
>I have a vsat connection with an ISP and 2 downlink via DVB.
> 
>I have split my network address space /22 in 1 /23 and 2 /24.
> 
>I would like to downlink on /24 on a dvb and the rest of the traffic to the
>other dvb.
Hi Brunild,

I would suggest that you announce the 2 /24 to you 1st DVB satellite
provider and then also announce a pre-pended /22 as well
Then announce the /23 to the second DVB satellite provide as well as a
pre-pended /22.
The most specific routes are chosen which means if DVB 1 is up the /24
routes are available and routing will prefer the /24 but if DVB 1 goes down
the routes will be removed from the internet routing tables but will be
matched in the /22 prefix from DVB 2 and therefore will use the other link.
This is true for the reverse on DVB 2

You also need to make sure you have some route objects in ripe or afrinic
for the blocks you are announcing as I have seen many people make that
mistake.

If you want to be more specific you can give us a sample of your configs and
will be happy to assist

HTH

Cheers,

Peter.
  

> 
>Added to that I would like when a dvb goes down to have the traffic to use
>the available downlink.
> 
>I have bgp with each peer on their AS number
> 
>Use ebgp next hot with each peers
> 
>set as multipath
> 
>and then do route map wih each peer but I put a long AS PATH to the non
>prefered route.
> 
>But it is not working.
> 
>Can you help?
> 
>Brunild
>-- 
>Brunild Kodjo