[outages] 3556 problems

[Hagen Miller]

Apologies if this has been posted already - I found this interesting:

https://blog.cloudflare.com/analysis-of-todays-centurylink-level-3-outage/


Hagen Miller
Senior Systems Engineer
Computer Services, Inc.

-----Original Message-----
From: Outages <outages-bounces at outages.org> On Behalf Of Rodriguez, Alfredo via Outages
Sent: Monday, August 31, 2020 12:43 PM
To: outages at outages.org
Subject: Re: [outages] 3556 problems

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Randy,

I'm almost wondering if the FlowSpec didn't inadvertently target control plane or MP-BGP traffic inadvertently causing the undulating and unrecoverable flapping of their network.

Alfredo Rodriguez

PS: Good to see a PSC staffer here (from a former CMU student and 'Burgh resident).

-----Original Message-----
From: Outages <outages-bounces at outages.org> On Behalf Of Randy Bush via Outages
Sent: Sunday, August 30, 2020 1:14 PM
To: outages at outages.org
Subject: Re: [outages] 3556 problems

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______________________________________________________________________
> initial research identified that an offending flowspec announcement
> prevented Border Gateway Protocol (BGP) from establishing

opsec paranoid here wonders about the content of the flowspec announcement and whence it originated.

randy
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