One /22 Two ISP no BGP

Dorn Hetzel dhetzel at gmail.com
Fri Feb 6 11:41:12 CST 2009


I would guess that if one of them can't change their announcement when their
link to you is down, then make sure their announcement is the less
preferred.

The ISP that *can* remove their announcement when their link to you is down
should be the preferred path since their path is much more
likely to be actually up...

On Fri, Feb 6, 2009 at 12:31 PM, Charles Regan <charles.regan at gmail.com>wrote:

> What if both annonce my /22 unweighted ?
>
> I know I will loose failover in this scenario.
>
> I am trying to figure out what will happen, traffic will flow inbound
> from both in a round-robin like method ?
>
>
>
>
> On Fri, Feb 6, 2009 at 1:24 PM, Charles Regan <charles.regan at gmail.com>
> wrote:
> > The can't do BGP.
> > They are already advertising two /24 for us. So they will advertise a
> > /22 if I ask them.
> >
> >
> > On Fri, Feb 6, 2009 at 1:20 PM, Jason Biel <jason at biel-tech.com> wrote:
> >> Good point on ISP1 Steve, being they are limited already, they might be
> just
> >> reselling.
> >>
> >>
> >>
> >> On Fri, Feb 6, 2009 at 11:18 AM, Steve Bertrand <steve at ibctech.ca>
> wrote:
> >>>
> >>> Jason Biel wrote:
> >>> > The link that goes down will trigger that provider to remove the
> route,
> >>> > traffic will swing and start coming in on the backup link.
> >>>
> >>> This is assuming that 'ISP1' has the capability to advertise the OP's
> >>> route in the first place.
> >>>
> >>> What if ISP1 is simply a customer of another ISP, using PA space, and
> >>> just reselling connectivity?
> >>>
> >>> Charles, you really need to find out what others have asked... can the
> >>> ISP1 advertise your block of space for you, or do they really mean that
> >>> they *can't* do BGP at all.
> >>>
> >>> Steve
> >>
> >>
> >>
> >> --
> >> Jason Biel
> >>
> >>
> >
>
>



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