[52348] in North American Network Operators' Group
Re: Sprint (1239) blackhole ? Or bogus /32 route ?
daemon@ATHENA.MIT.EDU (Mike Tancsa)
Thu Sep 26 14:42:38 2002
Date: Thu, 26 Sep 2002 14:40:17 -0400
To: Vinny Abello <vinny@tellurian.com>
From: Mike Tancsa <mike@sentex.net>
Cc: nanog@trapdoor.merit.edu
In-Reply-To: <5.1.1.6.2.20020926142627.036919f8@pop3.tellurian.com>
Errors-To: owner-nanog-outgoing@merit.edu
At 02:27 PM 26/09/2002 -0400, Vinny Abello wrote:
>Yep, you're right. Looks like they might blackholing the /32 with a null
>route on their network somewhere.
To mitigate the impact, I am sending 199.212.134.0/24 as a more specific
route through my other transit provider (15290) who does not transit with
1239. I am trying to limit the damage to just inside 1239 and those single
homed off 1239. I am sending 199.212.134.0/23 through Telus (852) who also
has transit with AS1239.
Someone else told me off list that Sprint usually blackholes with ACLs and
not NULL0 routing. So perhaps an IGP issue ? If so I would have thought
others would be seeing strange things as well.
---Mike
