From nobody Sun Aug 04 19:16:36 2024 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4WcTpK6JZJz5Srvn for ; Sun, 04 Aug 2024 19:16:57 +0000 (UTC) (envelope-from cross+freebsd@relay.distal.com) Received: from relay.wiredblade.com (relay.wiredblade.com [168.235.95.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4WcTpJ5Gz4z4SPR for ; Sun, 4 Aug 2024 19:16:56 +0000 (UTC) (envelope-from cross+freebsd@relay.distal.com) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=relay.distal.com header.s=mail header.b=etXgDV5q; dmarc=none; spf=pass (mx1.freebsd.org: domain of cross+freebsd@relay.distal.com designates 168.235.95.80 as permitted sender) smtp.mailfrom=cross+freebsd@relay.distal.com dkim-signature: v=1; a=rsa-sha256; d=relay.distal.com; s=mail; c=relaxed/relaxed; q=dns/txt; h=From:Subject:Date:Message-ID:To:MIME-Version:Content-Type:Content-Transfer-Encoding; bh=nRYaBliunpnC2kYebWF2nW78Uw0yzOfY36zTtv9+6Xs=; b=etXgDV5qSvc8vPYNr8motl2b7TorHBZM9vocpjn6rOKA+gLNE4hgT7yrCHBQQidZsvhscuUuY8PaAQNzQSGXje5KxJbyTBqT8bHHRq+aVBcYacTkIWddu92dSCSUW98tFXWS6XsvsxZwTYzLSe8Rj6W0KKjhKFiIo0dDW1mmi1ctZeOdt+8QgToqwHtl8kuUud+tr03OxQ4C4CH29MfdNUQKIj2RjuapzRKvEhVtkKa6TvsCRNU2jv4V1M Z6/ByPxZDmtZWlPsDOurCmoOOnBH5uC4eZ+ntj355/Jl5GUWZeGpt7gOssd7SZa97D5porPhEp2RFnyafg+OzsCmZ6SQ== Received: from mail.distal.com (pool-108-48-165-238.washdc.fios.verizon.net [108.48.165.238]) by relay.wiredblade.com with ESMTPSA (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256) ; Sun, 4 Aug 2024 19:16:49 +0000 Received: from smtpclient.apple ( [2001:420:c0c4:1005::d3]) by tristain.distal.com (OpenSMTPD) with ESMTPSA id b80bba20 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256:NO) for ; Sun, 4 Aug 2024 15:16:47 -0400 (EDT) From: Chris Ross Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3774.600.62\)) Subject: IPv6 interface identifier/index on FreeBSD? Message-Id: Date: Sun, 4 Aug 2024 15:16:36 -0400 To: freebsd-net@freebsd.org X-Mailer: Apple Mail (2.3774.600.62) X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.20 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.998]; FORGED_SENDER(0.30)[cross@distal.com,cross@relay.distal.com]; R_DKIM_ALLOW(-0.20)[relay.distal.com:s=mail]; R_SPF_ALLOW(-0.20)[+a:relay.dynu.com]; MIME_GOOD(-0.10)[text/plain]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_FROM(0.00)[freebsd]; FROM_NEQ_ENVFROM(0.00)[cross@distal.com,cross@relay.distal.com]; DMARC_NA(0.00)[distal.com]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; DKIM_TRACE(0.00)[relay.distal.com:+]; ASN(0.00)[asn:3842, ipnet:168.235.92.0/22, country:US]; APPLE_MAILER_COMMON(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_DN_NONE(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_HAS_DN(0.00)[] X-Rspamd-Queue-Id: 4WcTpJ5Gz4z4SPR So, moving to a dynamic IPv6 network, I want to be able to address my = hosts both predictably (for which eui64/RA has been working), and also = statically in some cases. For a dynamic network/subnet, an IPv6 address can be = specified by the =E2=80=9Csubnet prefix=E2=80=9D and "interface identifier=E2=80=9D = (or =E2=80=9Cinterface index=E2=80=9D according to ifconfig=E2=80=99s man page re: eui64). Linux systems = seem(ed) to call this =E2=80=9Ctoken=E2=80=9D, and it can be set for an interface (ip = token set). Is it possible to do this on FreeBSD? Searching the ifconfig man page = on FreeBSD 14 I don=E2=80=99t _see_ anything other than eui64 that mentions = this. If there isn=E2=80=99t a reason to allow setting the IID on an interface = in FreeBSD, was that decision made for a reason? Then, after that is the more complicated situation that I want to apply multiple IID=E2=80=99s across multiple aliases on the same interface. = That may or may not be reasonable, but will be my next question. Sub-interfaces or alias interfaces maybe? Thank you. - Chris=