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Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-edns-chain-query

Tony Finch <dot@dotat.at> Wed, 11 November 2015 16:41 UTC

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Date: Wed, 11 Nov 2015 16:41:27 +0000
From: Tony Finch <dot@dotat.at>
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Subject: Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-edns-chain-query
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Paul Vixie <paul@redbarn.org> wrote:

> > You get the entire CNAME chain in the first RTT so you can validate all
> > the links in the chain in the second RTT.
>
> here, you appear to be planning for a stub validator, which makes RD=1 queries.

Yes, that's what edns-chain-query is for.

> yes, that's flooding the channel. you're allowed one work-stream per
> query, in order that timeouts and other loss are only felt as
> backpressure by those apps who caused them.

Where is that specified?

> i have no objection to multiple parallel outstanding upstream queries
> over a TCP stream.

Why is TCP special?

Tony.
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