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Re: [Qirg] draft-dahlberg-ll-quantum-01 review comments

Joe Touch <touch@strayalpha.com> Mon, 01 April 2019 14:36 UTC

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From: Joe Touch <touch@strayalpha.com>
In-Reply-To: <F8286F61-183A-4710-9D0F-E80F77A0D171@tudelft.nl>
Date: Mon, 01 Apr 2019 07:36:46 -0700
Cc: Bruno Rijsman <brunorijsman@gmail.com>, "qirg@irtf.org" <qirg@irtf.org>
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References: <AFB61389-F811-481C-A002-63F32F7A08CE@gmail.com> <F8286F61-183A-4710-9D0F-E80F77A0D171@tudelft.nl>
To: Axel Dahlberg <E.A.Dahlberg@tudelft.nl>
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Subject: Re: [Qirg] draft-dahlberg-ll-quantum-01 review comments
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FYI...

> On Apr 1, 2019, at 5:31 AM, Axel Dahlberg <E.A.Dahlberg@tudelft.nl> wrote:
> 
> Hello Bruno! 
> 
> Your feedback is very useful and highly appreciated! I agree with your main comment that we should be more clear that the draft concerns a vertical service (SDU). Is a "vertical service" a generally excepted notion?
> 
> Specific protocol comments
> (P1) As already mentioned in comments on the open mike after your QIRG presentation, there is no need to invent a new "Node ID". You can use IPv6 addresses to identify quantum nodes in the quantum network. That will make it easier to re-use (modified) existing protocols in other parts of the quantum networking stack (e.g. existing routing protocols such as OSPF or ISIS to discover the topology of the quantum nodes and links, existing signaling protocols such as RSVP to setup end-to-end "paths", etc.)
> 
> I agree with this, at least I cannot see any issues with it.

This mistakes IP addresses as solely node identifiers; they alternately can be network endpoint identifiers. A single Internet node can have any number of IP addresses, as can even a single network interface, and the way in which these interact across interfaces varies.

See the “strong vs. weak” discussion in sec 3.3.4.2 of RFC1122. Link identifiers are strong; IP addresses can be either strong or weak - depending on how an endpoint is configured.

Joe

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