[151044] in North American Network Operators' Group
Re: Questions about anycasting setup
daemon@ATHENA.MIT.EDU (Phil Regnauld)
Sat Mar 10 05:24:57 2012
Date: Sat, 10 Mar 2012 11:23:57 +0100
From: Phil Regnauld <regnauld@nsrc.org>
To: Steve Gibbard <scg@gibbard.org>
In-Reply-To: <2763367C-26BA-4330-812E-C5898E154D14@gibbard.org>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Steve Gibbard (scg) writes:
> I have no idea what Cisco equipment Elmar is using, but I wouldn't jump to the conclusion that it can't withdraw routes when needed.
Wouldn't the dns bit of ip sla do most of what's needed on IOS ?
http://www.cisco.com/en/US/docs/ios/12_4/ip_sla/configuration/guide/hsdns.html
some interesting examples at www.cisco.com/web/CA/events/pdfs/CNSF2011-Automations_for_Monitoring_and_Troubleshooting_your_Cisco_IOS_Network-Dan_Jerome.pdf
(slide 29 and onwards)
Note: this is more of a question than an assertion,
I've used quagga/ospfd for DNS anycasting within ISPs, and a script
to monitor the nameserver response, but I'd love to hear what people are
doing that's not host based.
