BGP multihoming question.

Fri Dec 10 17:24:24 UTC 2010

> -----Original Message-----
> From: Bret Clark 
> Sent: Friday, December 10, 2010 7:08 AM
> To: nanog at nanog.org
> Subject: Re: BGP multihoming question.
> 
> On 12/10/2010 10:01 AM, Dylan Ebner wrote:
> > 3. You cannot trust the second isp to advertise the SWIP block
> correctly if they are not a tier 1. Even though they may advertise it
> for you to their upstream, they don't always have the appropriate
> procedures in place to get the LOAs to the upstream so your block just
> gets filtered out.
> >
> >
> >
> Just got done battling this exact issue with one of our upstream
> peers...caused a lot of headaches for us.

Proper registration in a routing registry helps, too.