From nobody Mon Sep 15 19:05:02 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 4cQZH42pcTz67nxN for ; Mon, 15 Sep 2025 19:05:20 +0000 (UTC) (envelope-from pusateri@keehole.org) Received: from kem.keehole.org (kem.keehole.org [136.41.224.255]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4cQZH32cyWz4BJv for ; Mon, 15 Sep 2025 19:05:19 +0000 (UTC) (envelope-from pusateri@keehole.org) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=keehole.org header.s=202408 header.b=JBYUJy7q; dmarc=pass (policy=none) header.from=keehole.org; spf=pass (mx1.freebsd.org: domain of pusateri@keehole.org designates 136.41.224.255 as permitted sender) smtp.mailfrom=pusateri@keehole.org Received: from smtpclient.apple (unknown [136.41.224.198]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by kem.keehole.org (Postfix) with ESMTPSA id 3B91972E78; Mon, 15 Sep 2025 15:05:13 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=keehole.org; s=202408; t=1757963113; bh=ik2wEMlZuS6WKTFSBtA9vitnr5SEBVFKqv8buMBy57g=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=JBYUJy7q76Q0ZViXgtyy0+fsm5ysBk7NdEF6p+0RlPf2v3LLzW4aWPDhNxnBAizMy DsOmxAfP7aFyi72JYr2kEPkGT29fa7gs/EKCGFDdRjT/yzZO46MvxbzuioqMIXxnln VC+FVg0NLQTMU4aJxpC3EF2maCmBv3wYiAhpCXTGd9v0qIrcB1BwhpJgJ2wFAFFl0m FtjYXF/Jtpix5pFFDFE5OI8NsZ1cv/pcnfjJMjVJ8mxxQDFbYdbyXo2WHypzvn+9AU wTzE2sG1u0xB6u2DIO75vp7s0ER6L3hT9vTw6/+yy5VRc3Bat0omlSCDYe2XZBjs62 xgY4Ovn+KW55A== Content-Type: text/plain; charset=utf-8 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 From: Tom Pusateri In-Reply-To: <74D374DA-09B8-4533-B2EE-1AFE2AC8EFAD@distal.com> Date: Mon, 15 Sep 2025 15:05:02 -0400 Cc: Karl Denninger , freebsd-net@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <4C00D174-21FE-47C4-A30A-A382138571A5@keehole.org> <6fce77fb-9ba8-4c7b-bb9b-0e337d91f278@denninger.net> <1780EFAC-DA9C-4593-BE37-28E7FFCE4388@distal.com> <6e7a8fc6-12c8-4097-ad70-bcb1e4967ade@denninger.net> <74D374DA-09B8-4533-B2EE-1AFE2AC8EFAD@distal.com> To: Chris Ross X-Mailer: Apple Mail (2.3826.700.81) X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.44 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-0.97)[-0.967]; NEURAL_HAM_SHORT(-0.67)[-0.671]; DMARC_POLICY_ALLOW(-0.50)[keehole.org,none]; R_SPF_ALLOW(-0.20)[+mx]; ONCE_RECEIVED(0.20)[]; R_DKIM_ALLOW(-0.20)[keehole.org:s=202408]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[keehole.org:+]; RCPT_COUNT_THREE(0.00)[3]; ARC_NA(0.00)[]; RCVD_COUNT_ONE(0.00)[1]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; ASN(0.00)[asn:16591, ipnet:136.32.0.0/11, country:US]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; APPLE_MAILER_COMMON(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; TAGGED_RCPT(0.00)[freebsd]; TO_DN_SOME(0.00)[] X-Rspamd-Queue-Id: 4cQZH32cyWz4BJv I would try running the 14.3p2 system without the VLAN configuration and = a direct connection to the upstream provider hardware (no switch) and = see if the problem persists. That will determine if it=E2=80=99s a VLAN = issue. Tom > On Sep 15, 2025, at 2:20=E2=80=AFPM, Chris Ross = wrote: >=20 > Okay. Apologies to those who like the whole thread to be in each = email, but > I=E2=80=99m starting again here after a discovery. >=20 > I rebooted my router after copying the 14.1p5 kernel I was running = earlier, > and while the system failed to come up very well (due to 14.3 = userland), I > was able to manually start up dhcpcd, the same actual binary, and it = was > able to set up my IPv6 connectivity through my ISP just like before. = So > there=E2=80=99s a regression here. Or something subtle I need to = change that I > am so far missing. >=20 > Summary: > When booted with FreeBSD 14.3-RELEASE-p2, dhcpcd gets an RA from my = ISP, > sends a NS, but never gets the NA response. Therefore no outgoing = packets > ever get out. >=20 > % ndp -an | grep vlan0 > fe80::3e8a:b0ff:fe3e:4dce%vlan0 (incomplete) vlan0 1s = I=20 > fe80::6e8:e675:f359:3465%vlan0 a4:53:0e:79:b9:82 vlan0 = permanent R > % tail /var/log/dhcpcd.log > Sep 15 14:03:14 [10047]: vlan0: soliciting an IPv6 router > Sep 15 14:03:14 [10047]: vlan0: sending Router Solicitation > Sep 15 14:03:14 [10047]: vlan0: Router Advertisement from = fe80::3e8a:b0ff:fe3e:4dce > Sep 15 14:03:14 [10047]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks ROUTERADVERT > Sep 15 14:03:17 [10047]: vlan0: fe80::3e8a:b0ff:fe3e:4dce is = unreachable > [...] >=20 > When booting with 14.1-RELEASE-p5, dhcpcd works as expected: >=20 > % cat 14.1-ndp-success > fe80::3e8a:b0ff:fe3e:4dce%vlan0 3c:8a:b0:3e:4d:ce vlan0 29s = R R > fe80::a653:eff:fe79:b982%vlan0 a4:53:0e:79:b9:82 vlan0 = permanent R=20 > % (lines from dhcpcd.log) > Sep 15 13:50:44 [57415]: vlan0: soliciting an IPv6 router > Sep 15 13:50:44 [57415]: vlan0: sending Router Solicitation > Sep 15 13:50:44 [57415]: vlan0: Router Advertisement from = fe80::3e8a:b0ff:fe3e:4dce > Sep 15 13:50:44 [57415]: vlan0: no global addresses for default route > Sep 15 13:50:44 [57415]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks ROUTERADVERT > Sep 15 13:50:45 [57415]: vlan0: multicasting REBIND6 (xid 0x142ec7), = next in 1.1 seconds > Sep 15 13:50:45 [57415]: vlan0: REPLY6 received from = fe80::3e8a:b0ff:fe3e:4dce > Sep 15 13:50:45 [57415]: vlan0: renew in 3600, rebind in 5760, expire = in 7200 seconds > Sep 15 13:50:45 [57415]: vlan0: writing lease: = /var/db/dhcpcd/vlan0.lease6 > Sep 15 13:50:45 [57415]: vlan0: delegated prefix = 2600:4040:2c9d:5200::/56 > [...] > Sep 15 13:50:45 [57415]: vlan0: adding default route via = fe80::3e8a:b0ff:fe3e:4dce > [...] > Sep 15 13:50:45 [57415]: vlan0: executing: = /usr/local/libexec/dhcpcd-run-hooks REBIND6 > Sep 15 13:50:45 [56455]: forked to background > [...] >=20 > So. What other information can I help gather? I might be able to run = tcpdump > when I=E2=80=99m up in 14.1 kernel, though the system is kinda broken = in a number of > ways. Let me know anything else I can gather to help track this = regression. >=20 > -Chris >=20