From nobody Sat Sep 20 14:39:43 2025 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 4cTX941NyRz67wCP for ; Sat, 20 Sep 2025 14:40:24 +0000 (UTC) (envelope-from cross+freebsd@relay.distal.com) Received: from relay.wiredblade.com (relay.wiredblade.com [168.235.105.136]) (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 4cTX932ngPz3ZB6 for ; Sat, 20 Sep 2025 14:40:23 +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=HpWy2IRW; dmarc=none; spf=pass (mx1.freebsd.org: domain of cross+freebsd@relay.distal.com designates 168.235.105.136 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:In-Reply-To:References; bh=Z8xCCNE9Yp54bloherr/FxFJBnf+8oFuaVir3uFpIJ4=; b=HpWy2IRWCtbJ1spOeAKVMbKRvmdu1zbm3LfR1A0QuNX4nggm91qd7W07GfJV/jD/JTEtIflLAEn2jBXrA9UIVZ+dKKk73Cukx8DHTJ6rzZLXTJ94rgu/G3zPQt4RsuiuAxbpzu656U3isMsyKqwO1pK6yknpBXSE6MpclZYOSMKw721d3tJF6UgO0a/+mElrSmvzhXcbqIsDqtheOQgmGBzU73S7fZoq9xDQ07ObcdPMvS9MeOyEwnlT43 XuMa0AMfFs5cakAejPqJtf/Hk8U0s1FJGd9kvWUgCCX4neh0n0wwbTvlMdJsqvfeY3OBMXz9P3abVqpEeuER4Bqfezrw== Received: from mail.distal.com (pool-108-51-233-124.washdc.fios.verizon.net [108.51.233.124]) by relay.wiredblade.com with ESMTPSA (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256) ; Sat, 20 Sep 2025 14:40:16 +0000 Received: from smtpclient.apple (magrathea.distal.com [206.138.151.12]) by tristain.distal.com (OpenSMTPD) with ESMTPSA id dc2a6845 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256:NO) for ; Sat, 20 Sep 2025 10:40:14 -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 \(3826.700.81\)) Subject: Re: IPv6 networking problems in 14.3 Date: Sat, 20 Sep 2025 10:39:43 -0400 References: <910737314.4002.1757962919189@localhost> <55365E3D-B7EA-4F95-BC1E-92910A2944EA@distal.com> <90A490DE-6BF0-4EBB-97CE-ECA690E2359C@distal.com> <5D82826E-8C0F-45CF-B9FF-093FD014E73F@distal.com> <611820c2-05f8-40bc-9b07-bef012183e30@denninger.net> <408DE851-47FF-476E-B7F6-C7920A93DD43@distal.com> <1BF72AB3-69B6-4BC6-BA5B-6517BD35E41D@distal.com> To: freebsd-net@freebsd.org In-Reply-To: <1BF72AB3-69B6-4BC6-BA5B-6517BD35E41D@distal.com> Message-Id: X-Mailer: Apple Mail (2.3826.700.81) X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.20 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; 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]; RCPT_COUNT_ONE(0.00)[1]; DMARC_NA(0.00)[distal.com]; RCVD_TLS_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_FROM(0.00)[freebsd]; DKIM_TRACE(0.00)[relay.distal.com:+]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_NEQ_ENVFROM(0.00)[cross@distal.com,cross@relay.distal.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; APPLE_MAILER_COMMON(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Queue-Id: 4cTX932ngPz3ZB6 > On Sep 18, 2025, at 16:36, Chris Ross = wrote: >=20 >> On 17 Sep 2025, at 14:20, Chris Ross = wrote: >> So, on the idea of trying to back-date the whole machine, I have ZFS >> snapshots of the whole root from just before the first upgrade, >> Aug 7/8. [=E2=80=A6] >=20 > [...] I=E2=80=99ve set bootfs to the older 14.1 system and gotten = that running. >=20 > It [...] out SOLICIT6 messages and [..] if I waited long enough (2ish > hours in my case), it eventually did get an answer! And, this is where things went odd again. The above attempt in older filesystem, I had during boot menu chosen my ROUTER custom kernel. Just a config I traditionally use that has fewer devices in it occupying = memory. So, thinking it shouldn=E2=80=99t make a difference I rebooted into the = default, GENERIC, kernel on the system. The default kernel had problems [1], so = I chose the boot/kernel.generic on the fs. Sadly, it did not work. I get the same state where the router LL is unroutable, ndp -an shows no MAC for it, and I have no IPv6. So, despite thinking the kernel config wasn=E2=80=99t key detail, I booted = back into kernel.router. Now I have no IPv6 there either. I tried just shutting down dhcpcd overnight to see if it ISP was confused, but no = help. So, it certainly could be the ISP, but the fact that I=E2=80=99m getting = RA=E2=80=99s (and dhcp6 responses) which dhcpcd is processing, but then the MAC for the routers LL isn=E2=80=99t available to the system, makes me think = it=E2=80=99s _not_ the ISP. I can=E2=80=99t imagine why a working rootfs and kernel could show a system level problem intermittently, though. Thoughts again invited. Not able to reproduce success now, I don=E2=80=99= t know that I can actually _test_ anything, but I=E2=80=99d love to hear = thoughts about any options/possibilities. - Chris [1] Sadly there is something wrong with /boot/kernel in that fs. When I boot it I get a number of: KLD uhid.ko: depends on kernel - not available or version mismatch KLD ums.ko: depends on kernel - not available or version mismatch KLD usbhid.ko: depends on kernel - not available or version mismatch KLD uhid.ko: depends on kernel - not available or version mismatch errors late in boot. That kernel is 14.1-RELEASE-p7 (despite the fs freebsd-update made named = zroot/ROOT/14.1-RELEASE-p8_2025-08-08_074410). The rest of the kernels I have on the fs are 14.1p5. something must be off with that one. So I booted /boot/kernel.generic, 14.1p5, and it boots fine. Current output log of dhcpcd: note "fe80::3e8a:b0ff:fe3e:4dce is = unreachable=E2=80=9D. That=E2=80=99s a kernel routing issue, and I think the primary problem. Sep 20 10:20:32 [30273]: vlan0: REPLY6 received from = fe80::3e8a:b0ff:fe3e:4dce Sep 20 10:20:32 [30273]: vlan0: renew in 3600, rebind in 5760, expire in = 7200 seconds Sep 20 10:20:32 [30273]: lo0: adding reject route to = 2600:4040:2c9c:2d00::/56 via ::1 Sep 20 10:20:32 [30273]: vlan0: writing lease: = /var/db/dhcpcd/vlan0.lease6 Sep 20 10:20:32 [30273]: vlan0: delegated prefix = 2600:4040:2c9c:2d00::/56 Sep 20 10:20:32 [30273]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks BOUND6 Sep 20 10:29:08 [30273]: vlan0: Router Advertisement from = fe80::3e8a:b0ff:fe3e:4dce Sep 20 10:29:08 [30273]: vlan0: no global addresses for default route Sep 20 10:29:08 [30273]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks ROUTERADVERT Sep 20 10:30:15 [30273]: vlan0: fe80::3e8a:b0ff:fe3e:4dce is unreachable Sep 20 10:30:15 [30273]: vlan0: delaying IPv6 router solicitation for = 0.7 seconds Sep 20 10:30:16 [30273]: vlan0: soliciting an IPv6 router Sep 20 10:30:16 [30273]: vlan0: sending Router Solicitation Sep 20 10:30:16 [30273]: vlan0: Router Advertisement from = fe80::3e8a:b0ff:fe3e:4dce Sep 20 10:30:16 [30273]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks ROUTERADVERT