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Re: [Idr] Fwd: New Version Notification for draft-spaghetti-idr-bgp-sendholdtimer-05.txt

Job Snijders <job@fastly.com> Mon, 15 August 2022 11:45 UTC

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Date: Mon, 15 Aug 2022 13:45:41 +0200
From: Job Snijders <job@fastly.com>
To: Robert Raszuk <robert@raszuk.net>
Cc: Gyan Mishra <hayabusagsm@gmail.com>, "idr@ietf. org" <idr@ietf.org>
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Subject: Re: [Idr] Fwd: New Version Notification for draft-spaghetti-idr-bgp-sendholdtimer-05.txt
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On Mon, Aug 15, 2022 at 12:50:42PM +0200, Robert Raszuk wrote:
> Please also observe that testing this is not that easy. It first
> requires broken BGP implementation and either instrumented BGP I/O to
> stop accepting arriving messages or forced by TCP peer's zero-window.
> We are dancing here around a very unlikely/marginal event to occur in
> practice.

Wrong. Testing this is super easy! Ben Cartwright-Cox authored running
code that triggers the problem in 100% of COTS vendors 100% of the time.

We call this the 'peer from hell', described 2 years ago:
https://mailarchive.ietf.org/arch/msg/idr/DQTWtKesQs6sd8M7rYN6UMCd_QE/

PCAPs of being connected to a 'peer from hell' are available at:
https://mailarchive.ietf.org/arch/msg/idr/wViscLxTTcfFI_YGtb3Viq7-RhQ/

Kind regards,

Job

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