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List: nanog
Subject: bgp dampening and anycast networks (particularly cloudflare)
From: David Hubbard <dhubbard () dino ! hostasaurus ! com>
Date: 2020-10-30 17:59:03
Message-ID: 3BA06152-BCB6-4342-A273-9B73BC98EA02 () dino ! hostasaurus ! com
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Hi all, was curious if anyone has found it necessary to alter their route dampening \
rules related to anycast networks, and Cloudflare especially? I've got a customer \
whose target web server has been going intermittently inaccessible from a very \
geographically distant Cloudflare location (AU), while no reports of issues from \
anywhere closer to the US. I'm seeing a bunch of their /24's dampened on my side in \
several locations, and they appear to be networks that favor or are specific to AU, \
so I'm thinking that's the issue. I'm going to whitelist their ASN, but perhaps I \
need to work on the policy to be more tolerant of flaps compared to years past with \
the increase in anycast use?
Thanks,
David
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<p class="MsoNormal">Hi all, was curious if anyone has found it necessary to alter \
their route dampening rules related to anycast networks, and Cloudflare \
especially? I've got a customer whose target web server has been going \
intermittently inaccessible from a very geographically distant Cloudflare location \
(AU), while no reports of issues from anywhere closer to the US. I'm seeing a \
bunch of their /24's dampened on my side in several locations, and they appear to be \
networks that favor or are specific to AU, so I'm thinking that's the issue. \
I'm going to whitelist their ASN, but perhaps I need to work on the policy to be more \
tolerant of flaps compared to years past with the increase in anycast \
use?<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">David<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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