[isp-bgp] Re: Traffic coming down "opposite" pipe

["A Moroska" <amoroska@...>]

-----Original Message-----
From: Pete Templin <petelists@...>
To: isp-bgp@isp-bgp.com
Date: Wed, 04 Feb 2004 13:21:18 -0600
Subject: [isp-bgp] Re: Traffic coming down "opposite" pipe

> If address space A came from a larger aggregate of provider A, 
> announcing the more specific through B only will cause a strong swing 
> toward B (and vice versa).
> 
> You'll need to get your providers to let you announce your space 
> directly to get a rough balance.
> 
> Rick Kunkel wrote:
> 
> > I have a couple of IP providers and have started running BGP with
> them.  I
> > have a /22 from each of them.
> > 
> > We'll call the providers A and B, and the address space is
> 10.0.0.0/22 and
> > 10.0.4.0/22, respectively.
> > 
> > I'm currently getting a 0.0.0.0/0 route from each of them, and I'm
> > currently announcing 10.0.0.0.22 and 10.0.4.0/22 to each of them.
> > 
> > If I go to a looking glass and do a trace or show ip bgp to the
> provider A
> > address space, it goes through provider B.  if I trace or show ip bgp
> to
> > provider B's space, it goes through.  This seems to be almost
> universal.
> > 
> > Is this because my providers are aggregating my announcment into a
> larger
> > announcement, so the route through the opposite provider always looks
> more
> > specific and hence more attractive?
> > 
> > Any other ideas?
> > 
> > If the aggregation is the suspected prob, can I correct this?  Can I
> tell
> > my providers to stop aggregating my announcement into a larger one?
> > 
> > Thanks,
> > 
> > Rick Kunkel
> > 
> > 
> > 
> > 




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------------------------ANNOUNCEMENT---------------------------------
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        - ISPCON Spring 2004 - Washington DC Hilton & Towers -
             - The ISP and WISP event - www.ispcon.com -
        - Where the industry shares its formulas for success!
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