Re: BGP multihoming question.

["Robert E. Seastrom" <rs () seastrom com>]

"George Bonser" <gbonser () seven com> writes:

> > -----Original Message-----
> > From: Bret Clark 
> > Sent: Friday, December 10, 2010 7:08 AM
> > To: nanog () 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.

As does, frankly, having an ISP with a clue...  and purported "tier"
has little to do with it.

-r