[180374] in North American Network Operators' Group
Re: BGP Multihoming 2 providers full or partial?
daemon@ATHENA.MIT.EDU (Baldur Norddahl)
Mon Jun 1 17:13:51 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <CAP-guGVjZ1iLt_K3TTE9HjPQcYJd=a+W_HRqPZN9-kNOtGYRGQ@mail.gmail.com>
Date: Mon, 1 Jun 2015 23:13:47 +0200
From: Baldur Norddahl <baldur.norddahl@gmail.com>
To: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
This is only a problem if you use so called tier 1 transit providers.
The smaller fish in the pond have multiple transits themselves and will
there by always have an alternative route available.
Regards
Baldur
Den 01/06/2015 22.32 skrev "William Herrin" <bill@herrin.us>:
> On Mon, Jun 1, 2015 at 2:40 PM, Blake Hudson <blake@ispn.net> wrote:
> > A gateway of last resort, also called a backup default route, will take
> care
> > of partitions
>
> No, Blake, it won't. A partition means one of your ISPs has no route
> to the destination. Route the packet to that ISP via a default route
> and it gets sent to /dev/null. More, during a partition you don't get
> to pick which of your ISPs lack the route.
>
> Regards,
> Bill Herrin
>
>
>
> --
> William Herrin ................ herrin@dirtside.com bill@herrin.us
> Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
>
