IETF Logo Mail Archive

Re: [core] Requiring mDNS participation for a node to be discoverable

Ted Lemon <mellon@fugue.com> Wed, 21 February 2024 14:53 UTC

Return-Path: <mellon@fugue.com>
X-Original-To: core@ietfa.amsl.com
Delivered-To: core@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 532D9C14F6F7 for <core@ietfa.amsl.com>; Wed, 21 Feb 2024 06:53:37 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.905
X-Spam-Level:
X-Spam-Status: No, score=-1.905 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=fugue-com.20230601.gappssmtp.com
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RNOVcw0UsWzH for <core@ietfa.amsl.com>; Wed, 21 Feb 2024 06:53:36 -0800 (PST)
Received: from mail-qv1-xf36.google.com (mail-qv1-xf36.google.com [IPv6:2607:f8b0:4864:20::f36]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7F052C14F6E3 for <core@ietf.org>; Wed, 21 Feb 2024 06:53:36 -0800 (PST)
Received: by mail-qv1-xf36.google.com with SMTP id 6a1803df08f44-68facd7ea4aso3394906d6.0 for <core@ietf.org>; Wed, 21 Feb 2024 06:53:36 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fugue-com.20230601.gappssmtp.com; s=20230601; t=1708527215; x=1709132015; darn=ietf.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=Er0zQ5kEVo1K+BUEV4uE9xUBcN1WpDYLXX5G1wWDB8A=; b=UgLX2tGd6o2bpqIEiFu9Lm6uif4H3LY82DkGPi167rnfAITbVGt9dvEUxLMufpkDPA 872I4gjiThlch0Aqlq95xwtYI0Z82jFCf1yjB5cyeMOKaoMUnGwmjVSoH0LaNjVpPCny DMSgD2C8kgrEiaxcLoP7Yp/CGImAGydyqd1ARKcqXNnlJWWCcZw7Mj31gEbq0y8hsJp0 IVJUlwVWklzDvcInzLyZ0TvwNyaJCAGB95xUV7eZb4Bm9b9rSbaH4r6GzEkRPYxsWMZN 8uf6yxirQePPaH5TCRe0RCCO9H11ZTj4hqwGxRRT1VU2lcssIe4JiS4hVqLT2imNX7U9 w3jg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708527215; x=1709132015; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Er0zQ5kEVo1K+BUEV4uE9xUBcN1WpDYLXX5G1wWDB8A=; b=oOziKZn/es8G+LlfMP7Ivw5jNY8aRoL6gcqlT6jHb3xr2fu1CzLcAkBFKU2zOPja3o 74attUWOal7XL8k+2hNb3MOfKXU33dh7M0N60v8sCNyDqeapFpDSvlBi0r+4ZQpoisJY f3DjrxiQMPD3NiXRbimA2fQn0nnLu5sutOaHnQBz0jygSJ7HqO0YPY/hCIK2FIvxFprO kbYMjapPT7X4sxc9oq6UsfjSgh3ZrqozQ7jnutnwSPCVtLJ8dSmobFrKRZStqXOOhZ6D RzCf4qGjTO+GkVm3U2X7ZcQXtwZ2BigowGFxqFtWh7kWmols9IBn105Vrp0peeEzI5kB iiTg==
X-Gm-Message-State: AOJu0YwGmyPXVNVlLqpnbBExVu36IljnXwBchpe2zKLxnrbO53hKc2XB iUW3tKOXztu6TKFsqAvjOEXYrHdkqUNnbuTiRa5JE60lb0BuoX3bqoL653TUMrDVm4IeRBwApp2 szjmltabTAGQ2/1PUfYU/vktJu1bDJepUzF/p61LMYBmrkt1k
X-Google-Smtp-Source: AGHT+IGfIk3m/lCtWx/7c4J7gYM+Ii8fBUnccI4185uoj7xgF/1GQ5WaqhwlJW2OTVnHoBTHYExCvBQhc3xDpFYFVKg=
X-Received: by 2002:a0c:f0cd:0:b0:68f:3f86:c2c7 with SMTP id d13-20020a0cf0cd000000b0068f3f86c2c7mr20289837qvl.6.1708527214976; Wed, 21 Feb 2024 06:53:34 -0800 (PST)
MIME-Version: 1.0
References: <3EB788AE-F999-4B11-9F58-D330226C37A4@tzi.org>
In-Reply-To: <3EB788AE-F999-4B11-9F58-D330226C37A4@tzi.org>
From: Ted Lemon <mellon@fugue.com>
Date: Wed, 21 Feb 2024 09:52:58 -0500
Message-ID: <CAPt1N1nqc3scvc=bZf0wF6Tx_tttV+_zdGCU25QhxB81M6eK9g@mail.gmail.com>
To: Carsten Bormann <cabo@tzi.org>
Cc: core@ietf.org
Content-Type: multipart/alternative; boundary="000000000000bcfc120611e57d18"
Archived-At: <https://mailarchive.ietf.org/arch/msg/core/IDSAwEyWBj3elQmepaNHEXbhETc>
Subject: Re: [core] Requiring mDNS participation for a node to be discoverable
X-BeenThere: core@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: "Constrained RESTful Environments \(CoRE\) Working Group list" <core.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/core>, <mailto:core-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/core/>
List-Post: <mailto:core@ietf.org>
List-Help: <mailto:core-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/core>, <mailto:core-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 21 Feb 2024 14:53:37 -0000

FWIW I think requiring a node to run mDNS doesn't make sense for
power-constrained devices, because mDNS pretty much requires them to wake
up with every multicast. We finessed this with Thread by having nodes
register using SRP with a central service (presumably not
power-constrained, or not /as/ power-constrained), which then proxies mDNS
on their behalf on the infrastructure network. Devices on Thread use DNS
Push rather than mDNS for discovery. This seems like a better approach to
me than requiring constrained devices to do mDNS directly, at least when
the layer 2 is some 802.15.4 variant.

On Wed, Feb 21, 2024 at 3:03 AM Carsten Bormann <cabo@tzi.org> wrote:

> The perennial discussion about link-local names has been newly revived
> over in the HTTPBIS WG list.
>
> The newest contribution
> <
> https://www.w3.org/mid/CAPDSy+7h3SSeKyA2CUazyWWsUi6+xhn2i91zNW1uz4NhgOGkug@mail.gmail.com
> >
> proposes a best current practice (BCP) that essentially requires a node to
> run mDNS so that others are able to find it (IP address and which link it
> is on).
>
> It seems to me this discussion is of interest to the constrained devices
> community.
>
> Grüße, Carsten
>
> _______________________________________________
> core mailing list
> core@ietf.org
> https://www.ietf.org/mailman/listinfo/core
>

v2.23.0 | Report a Bug | By Email