Mailing List Archive

I saw up to 40% packet-loss on the Comcast network between
Sacramento/Portland, for intermittent periods of time between 9AM-3PM
PST. It's been stable the past few hours.



This was seen both via Level3 and Sprint from my perspective.



From: outages-bounces@outages.org [mailto:outages-bounces@outages.org]
On Behalf Of Monika Bajwa
Sent: Monday, August 17, 2009 15:42
To: outages at outages.org
Subject: [outages] Level 3 routing issue



Level 3 had a routing loop problem in San francisco on 8/8-8/9. We had
issues with

Comcast customers being able to access some websites. Did anyone see
anything similar ?





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Our texas NMS picked up ingress routing trouble to Level(3) prefixes around
3:00AM PST. Traffic to SFO and SJC from Dallas was headed through London.
Level(3) seemed to correct this after about 45 minutes.


On Mon, Aug 17, 2009 at 3:41 PM, Monika Bajwa <mbajwa75 at yahoo.com> wrote:

> Level 3 had a routing loop problem in San francisco on 8/8-8/9. We had
> issues with
> Comcast customers being able to access some websites. Did anyone see
> anything similar ?
>
>
>
> _______________________________________________
> outages mailing list
> outages at outages.org
> https://puck.nether.net/mailman/listinfo/outages
>
>


--
Andy Schwabecher
Central Host, Inc.
andy at centralhost.com
+1-877-741-6168 office/fax
+1-408-209-1528 cell
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On Tue, Aug 18, 2009 at 8:41 AM, Monika Bajwa <mbajwa75 at yahoo.com> wrote:

> Level 3 had a routing loop problem in San francisco on 8/8-8/9. We had
> issues with
> Comcast customers being able to access some websites. Did anyone see
> anything similar ?
>

Yes. Started at 3:36am Pacific, and ended at 4:12am.

Looks like level 3 were advertising their US routes out of London, with
latency from non-L3 in San Francisco to multiple Level 3 around 200ms and
near 100% packet loss.


2 10gigabitethernet1-1.core1.sjc2.he.net (72.52.81.178) 10.484 ms
13.600 ms 4.616 ms
3 10gigabitethernet1-3.core1.nyc4.he.net (72.52.92.26) 90.816 ms 86.060
ms 79.697 ms
4 10gigabitethernet1-2.core1.lon1.he.net (72.52.92.78) 160.023 ms
149.021 ms 157.903 ms
5 * * *
6 * * *
7 * * *

Scott.
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