nanog mailing list archives

Re: BGP Multihoming 2 providers full or partial?


From: William Herrin <bill () herrin us>
Date: Mon, 1 Jun 2015 16:28:05 -0400

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/>


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