[90696] in North American Network Operators' Group
Re: IP failover/migration question.
daemon@ATHENA.MIT.EDU (Andrew Warfield)
Sun Jun 11 23:56:08 2006
Date: Sun, 11 Jun 2006 20:55:42 -0700
From: "Andrew Warfield" <andrew.warfield@cl.cam.ac.uk>
To: "Christopher L. Morrow" <christopher.morrow@verizonbusiness.com>
Cc: "Randy Bush" <randy@psg.com>, nanog@merit.edu
In-Reply-To: <Pine.GSO.4.58.0606120318350.19686@marvin.argfrp.us.uu.net>
Errors-To: owner-nanog@merit.edu
> I think there is some cisco magic you could do with 'dial backup'... you
> may even be able to rig this up with an ibgp session (even if that goes
> out over the external provider) to swing the routes.
>
> NOTE: this could make your site oscillate if there are connectivity issues
> between the sites, it could get messy FAST, and it could be hard to
> troubleshoot. Basically look before you leap :)
>
> This link may b e of assistance:
> http://tinyurl.com/l8zpm
This link asks me for a login...
> to get greed into it.. are you sure you want to be 'stuck' with a single
> carrier? :) What if the carrier dies wouldn't you want redundant carrier
> links as well?
I'd love a multi-ISP solution. I just assumed that anything involving
more than a single upstream AS across the two links would leave me
having to consider BGP convergence instead of just IGP reconfig. I
didn't presume that that would likely be something that happened in
seconds. If there's a fast approach to be had here, I'd love to hear
it.
thanks,
a.
