Re: [Dots] WGLC on draft-ietf-dots-server-discovery-05

"Jon Shallow" <supjps-ietf@jpshallow.com> Wed, 06 November 2019 14:59 UTC

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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Valery Smyslov'" <valery@smyslov.net>, <dots@ietf.org>, <dots-chairs@ietf.org>
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Date: Wed, 6 Nov 2019 14:58:52 -0000
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Subject: Re: [Dots] WGLC on draft-ietf-dots-server-discovery-05
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Hi All,

I have read through draft-ietf-dots-server-discovery-05 and think that it is
a good document.

However, in particular with DHCPv(4|6), it is only possible to use the first
OPTION_Vx_DOTS_ADDRESS (5.1.3, 5.2.3).  If the server at the first address
is down / unavailable for whatever reason, it is not possible to define a
backup IP address as a secondary entry.  Is it the intention to not allow
backup IP addresses?

With DNS, I know that A/AAAA records can be presented round-robin which
gives the possibility of backup IP addresses, but am not sure whether this
holds true for implementations for other Resource Records.  If backup
addresses are to be allowed, the draft is unclear whether only the first
A/AAAA RR is allowed, or each can be tested until the first non-failure is
found, or whether happy-eyeballs it to be invoked against all of the IP
addresses and then the final IP preferentially chosen according to the RR
returned order.

Regards

Jon

> -----Original Message-----
> From: Dots [mailto:ietf-supjps-dots-bounces@ietf.org] On Behalf Of Valery
> Smyslov
> Sent: 23 October 2019 08:37
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org
> Subject: [Dots] WGLC on draft-ietf-dots-server-discovery-05
> 
> Hi,
> 
> this message starts a Work Group Last Call (WGLC) for
draft-ietf-dots-server-
> discovery-05.
> The version to be reviewed is here:
https://www.ietf.org/id/draft-ietf-dots-
> server-discovery-05.txt
> 
> The WGLC will last for two weeks and will end on November the 7th.
> Please send your comments to the list before this date.
> 
> Regards,
> Frank & Valery.
> 
> 
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