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Re: statement regarding keepalives

Kent Watsen <kwatsen@juniper.net> Fri, 20 July 2018 15:14 UTC

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From: Kent Watsen <kwatsen@juniper.net>
To: Mikael Abrahamsson <swmike@swm.pp.se>
CC: "tsv-area@ietf.org" <tsv-area@ietf.org>, "tsvwg-ads@tools.ietf.org" <tsvwg-ads@tools.ietf.org>, "tls-ads@ietf.org" <tls-ads@ietf.org>, "netconf-chairs@ietf.org" <netconf-chairs@ietf.org>
Subject: Re: statement regarding keepalives
Thread-Topic: statement regarding keepalives
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Date: Fri, 20 Jul 2018 15:14:47 +0000
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> ...but still don't put off people turning on TCP keepalives "because
> the IETF doesn't recommend that", and thus they do nothing at all and
> the problem just persists.

No disagreement with what you and others have written, but note that 
the proposed statement only recommends not using TCP keepalives in
the presence of a crypto layer on top of the TCP-layer.

Perhaps the statement could be refined, something along the lines 
of, in cases when there is a crypto layer, to recommend not using,
or at least relying on, TCP keepalives, *unless* higher-level
keepalives have stopped working.

To be clear, the statement as written, though not stated explicitly,
recommends TCP keepalives, in cases where they make sense.

Kent

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