question regarding multi-homing

William Herrin herrin-nanog at
Wed Dec 30 12:25:00 CST 2009

On Wed, Dec 30, 2009 at 12:02 PM, Simon Chen <simonchennj at> wrote:
> I have a question regarding multi-homing, mostly from stub network's
> operational point of view. My big question is: what kind of failures
> do you usually see from your providers? Link down? Link up, but
> withdraw some routes? Link up, no route change, but blackholing
> partial or all traffic? Anything else?

Two more failure modes:

Link up, receiving all routes but provider stops propagating your
announcement outward.

Link up but unusably high packet loss to some or all destinations.

Bill Herrin

William D. Herrin ................ herrin at  bill at
3005 Crane Dr. ...................... Web: <>
Falls Church, VA 22042-3004

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