nanog mailing list archives
RE: question regarding multi-homing
From: Jason Shearer <jshearer () amedisys com>
Date: Thu, 31 Dec 2009 08:00:20 -0600
Link up, receiving all routes but provider stops propagating your announcement outward.
Longer AS path prepending on your secondary connection should take care of this, eh? Might end up with asymmetric routing but better than no traffic being returned.
Link up but unusably high packet loss to some or all destinations.
Assuming Cisco hardware what is the best way to handle this? Setup some IP SLA and bind them to a tracking objects? Use EEM and TCL scripting? Thanks! Jason -----Original Message----- From: William Herrin [mailto:herrin-nanog () dirtside com] Sent: Wednesday, December 30, 2009 12:25 PM To: Simon Chen Cc: nanog () nanog org Subject: Re: question regarding multi-homing On Wed, Dec 30, 2009 at 12:02 PM, Simon Chen <simonchennj () gmail com> 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. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 *** NOTICE--The attached communication contains privileged and confidential information. If you are not the intended recipient, DO NOT read, copy, or disseminate this communication. Non-intended recipients are hereby placed on notice that any unauthorized disclosure, duplication, distribution, or taking of any action in reliance on the contents of these materials is expressly prohibited. If you have received this communication in error, please delete this information in its entirety and contact the Amedisys Privacy Hotline at 1-866-518-6684. Also, please immediately notify the sender via e-mail that you have received this communication in error. ***
Current thread:
- question regarding multi-homing Simon Chen (Dec 30)
- Re: question regarding multi-homing Seth Mattinen (Dec 30)
- RE: question regarding multi-homing Dylan Ebner (Dec 30)
- Re: question regarding multi-homing Steven Fischer (Dec 30)
- Re: question regarding multi-homing William Herrin (Dec 30)
- RE: question regarding multi-homing Jason Shearer (Dec 31)
- Re: question regarding multi-homing Simon Chen (Dec 31)