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

[heasley <[e-mail]>]

Thu, Aug 04, 2022 at 06:23:58PM +0200, Robert Raszuk:
> So we are trying to drop a session towards the BGP peer who does not
> respect basic RFC4271 obligation to drop the session when HOLD TIMER
> expires. That to me is already marginal (read noise corner case).

I hesitate to mention this, but a case for it to ignore a lack of reading
KAs is that it has data that is readable - ie: there is data is in its
socket's receive buffer.  If a speaker is heavily loaded, such as a
booting RS, considering a non-empty receive buffer as requivalent to
"KAs received" seems an entirely legitimate way to manage resources under
load.

How the draft addresses such a case, such as recommended values,  seems
like something for post-adoption discussion.

> Then we worry that LINUX TCP stack may have buggy implementation of
> TCP_USER_TIMEOUT and instead of fixing it locally we dismiss this option.

It being buggy is irrelevant - it need not be buggy and is also something
that I can fix, which I can not fix the neighbor, only work-around.  The
draft should not concentrate on a particular implementation's facilities
to recognize the problem, different implementations do exist.