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Re: statement regarding keepalives

Joe Touch <touch@strayalpha.com> Fri, 20 July 2018 14:47 UTC

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Subject: Re: statement regarding keepalives
From: Joe Touch <touch@strayalpha.com>
In-Reply-To: <alpine.DEB.2.20.1807201340240.14354@uplift.swm.pp.se>
Date: Fri, 20 Jul 2018 07:47:57 -0700
Cc: Kent Watsen <kwatsen@juniper.net>, "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>
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References: <D3326DE0-3F31-4045-B945-82B3F417BE4B@juniper.net> <alpine.DEB.2.20.1807201340240.14354@uplift.swm.pp.se>
To: Mikael Abrahamsson <swmike@swm.pp.se>
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> On Jul 20, 2018, at 4:47 AM, Mikael Abrahamsson <swmike@swm.pp.se> wrote:
> 
> So I'd like to see in the text that we recommend to do it as "high up" in the stack as possible, 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.

Agreed. Further, I don’t see the problem with having keepalives at all levels of the stack - at lower levels, they can be suppressed as long as higher levels are performing that function, but it’s still always useful to have them on at lower levels as a “backup”.

So I would hesitate to say “do this at the highest level”. My advice would be “do this at ALL levels that benefit, and be sure to suppress independent keepalives at a given level if there is activity at higher levels that suffices”.

Joe

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