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

Robert Raszuk <robert@raszuk.net> Wed, 03 August 2022 09:42 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Wed, 03 Aug 2022 11:42:53 +0200
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To: heasley <heas@shrubbery.net>
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Subject: Re: [Idr] Fwd: New Version Notification for draft-spaghetti-idr-bgp-sendholdtimer-05.txt
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>
> Even if the remote (stuck) peer does not process the FIN, the local
> end will close the session and stop forwarding traffic that direction.
> That is an improvement, from an operator's PoV, both for forwarding
> errors and local resources.


Would not the same happen when you will send keepalives *ONLY* upon
receiving them from a peer.

If both sides support it there should be no issue of stuck sessions. Also
no new timer needed and could be knob to enable/disable it.

This draft assumes that one peer is bad and the other should time out when
it can not send. So I am asking what exactly is the trigger to fire that
timer when BGP can not write to a TCP socket ? Is it Error 105: No buffer
space available ? Something else ?

If this is just queued keepalives (no BGP churn) then depending on the
buffer size it may take ages to fill ...

Best,
R.

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