From nobody Thu Jun 19 01:29:20 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 4bN31M0k2Sz5yMjp for ; Thu, 19 Jun 2025 01:29:27 +0000 (UTC) (envelope-from zlei@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [IPv6:2610:1c1:1:606c::24b:4]) (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-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4bN31M08g8z41ks; Thu, 19 Jun 2025 01:29:27 +0000 (UTC) (envelope-from zlei@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750296567; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=mZ0AKRC1uBpc1ZN/u8JK8ehSW2BLMVUBq8X/YfwARKI=; b=IbL9tYnKF9gGHHVEblI7KhVuCz5dIHf618X3dDzpv+6+gaHUtbrzRVuLCGFC+7agsIa2EG SrYKO3SpxkbdVOLqExOF/1/jdwfUZq2/Px6X95uo/2PrmtEkoXP9Vcml+YxiNONrsPyCDJ KQrbLODeWh02dEkJ/kAfv1D9iFOtqLq2LibdHpPAHznfZ8D6WjL4z7ob7eVGCbh5JCQPAh kggGVWCAXa7eINJGomOdkNqTwu+B7b5kSrYIav7dIg8SsSp7fs1fQ8UaMvEPxqCnMtZqMS ssRwS7VPwhs4oikudplmb1g33PHkykZKcnkJIDLTBDlCLP9O7dWOSd77MNZZxw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750296567; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=mZ0AKRC1uBpc1ZN/u8JK8ehSW2BLMVUBq8X/YfwARKI=; b=WGKCS5YB3sqjOBE+U080wV2/bdYTKGVASgi8SBZbELUAOSOrRFNCIe/AuVdRXY3HPK9D2b ds7ID5LYhWfMj1M2GIyQG+9nh53AX9v53ly88OvGN2CFl7fwOPZT/8H+9KHYnG6UABjj+g 48XcHdYTBcDhvR0Wl2u12VcvWg7wQFkdEuPNsoB8b6IQMbUFwutp/cE9sCsz0Haul8jIaI yYkI3zMmU/GCxOM5Z16vvNksZNnlsvyZWWyQ4a0402ITAplApud5njgvPEz099al0Ohjsz zqDw7xBOwZDRUqnSFyakSRi/6WLxmX+Q2rvonWqrcPXFGm+eHf/H3yOAeq+lJQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1750296567; a=rsa-sha256; cv=none; b=KftEME1Bv9fzLiiAllM1OwKiaqGOqnYoT/zhTHJgVPVSEijtGK45zzU3CAouGxYWNZQ0eZ or6jAjD7WQijkXHC+k/dhLvRTWNqjbZACRddqQ96JPca9RWkZhl3C41Vw7GosYCbTPWh/n hidH5PIi4/2RsKZCd8On1U3zui/+TmeFKgvjpJE8pMVEkEaEucH7cYNou99LqAZ8XytWXC hunBAyyKTEdiNcpbCJjOcJGUupwvFqjDKe1XsCqnmUqwGlJQSaG7KW+2Vr3DeP0llynMie MwC/MYbUVbLAMRFQjWT8w2xtXnhXBYt8LsbVwwYOHoa4wp1eouO8WOUSKaYpfg== Received: from smtpclient.apple (ns1.oxydns.net [45.32.91.63]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) (Authenticated sender: zlei/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4bN31K5rBkz12Pl; Thu, 19 Jun 2025 01:29:25 +0000 (UTC) (envelope-from zlei@FreeBSD.org) From: Zhenlei Huang Message-Id: <79909EDE-CFB2-45E9-8DC0-E042704908B4@FreeBSD.org> Content-Type: multipart/signed; boundary="Apple-Mail=_F02483BA-33A6-40F5-97D8-D4335BFE780B"; protocol="application/pgp-signature"; micalg=pgp-sha512 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 \(3696.120.41.1.10\)) Subject: Re: dhcpcd(8) into FreeBSD base Date: Thu, 19 Jun 2025 09:29:20 +0800 In-Reply-To: Cc: FreeBSD Net To: Karl Denninger References: <18ff2d4772a.129dde187836962.5411001908566459400@marples.name> X-Mailer: Apple Mail (2.3696.120.41.1.10) --Apple-Mail=_F02483BA-33A6-40F5-97D8-D4335BFE780B Content-Type: multipart/alternative; boundary="Apple-Mail=_7E893E2C-C76B-41AF-9D20-3A8B69795A02" --Apple-Mail=_7E893E2C-C76B-41AF-9D20-3A8B69795A02 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii > On Jun 19, 2025, at 6:00 AM, Karl Denninger = wrote: >=20 > Resurrecting an older thread.... >=20 >=20 Can you please point me to the thread ? I'd like to gather more context = from that. > I have Kub Fiber here and have run into an interesting problem I've = not seen on anything else (this same config, absent dhcpcd but on the = stock FreeBSD config, worked fine on both Cox and Spectrum without = changes.) >=20 > On a first use dhcpcd gets both IPv4 and IPv6 addresses, but sometimes = the IPv4 side fails to be able to ARP (!!!!) the other end. If I drop = the interface (ifconfig ix0 down; ifconfig ix0 up) it never fails on the = second try. If it fails on the first try doing a "arp -d" on the other = end resolves nothing; only recycling the interface does. Once it comes = up its 100% stable and never drops it. Obviously with no arp for the = other end you get nothing (in either direction.) >=20 > That I can handle (but its damned annoying) with a script that checks = connection to the other side and, if it can't get anything, does the = above. >=20 > The more serious problem is with Ipv6. If I shut down my gear (and = the company's ONT) and then turn the power back on (say, because I need = to work on the UPS in my rack!) it will come back up on IpV4 but never = gets an answer to the SOLICIT response. It also never sees anything = from the neighbor request! >=20 > In other words ("tcpdump -i ip6 ix0"): >=20 > 14:42:25.301564 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:30.573650 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router = solicitation, length 16 > 14:42:31.594474 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > = ff02::1:2.dhcpv6-server: dhcp6 solicit > 14:42:32.690063 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > = ff02::1:2.dhcpv6-server: dhcp6 solicit > 14:42:34.506030 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:34.574904 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router = solicitation, length 16 > 14:42:34.764176 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > = ff02::1:2.dhcpv6-server: dhcp6 solicit > 14:42:35.501814 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:35.934710 IP6 2a06:4880:4000::68.53490 > = 2606:83c0:8000:ff00:ba27:ebff:fe39:701d.4567: Flags [S], seq 605251823, = win 14600, options [mss 1440], length 0 > 14:42:36.509588 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:38.580627 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router = solicitation, length 16 > 14:42:38.732812 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > = ff02::1:2.dhcpv6-server: dhcp6 solicit > 14:42:40.337515 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:41.321509 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:42.329737 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:42.595011 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router = solicitation, length 16 > 14:42:44.782492 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:45.749503 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:46.745515 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:47.109267 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > = ff02::1:2.dhcpv6-server: dhcp6 solicit > 14:42:48.809742 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:49.805572 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 > 14:42:50.801697 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: = ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length = 32 >=20 > The interface is up and is passing Ip4 traffic. >=20 > And even more odd I get this once in a while: >=20 > 14:45:26.688858 IP6 enviable.census.internet-measurement.com.53565 > = 2606:83c0:8600::10c.58222: Flags [S], seq 3619826346, win 14600, options = [mss 1440], length 0 > 14:45:26.696834 IP6 stupendous.census.internet-measurement.com.53321 > = 2606:83c0:8600::10c.rsf-1: Flags [S], seq 3940102705, win 14600, options = [mss 1440], length 0 >=20 > The prefix IS part of the provider's delegation but I have no IPv6 = address so I have absolutely no idea how they think routing that to me = is reasonable -- but they do. >=20 >=20 For unwanted IPv6 packets, the net stack should drop them silently, and = fundamentally you can NOT prevent your provider from sending them. Also = be aware that tcpdump(1) by default turns the interface into promisc = mode. > They're pointing at "my gear" as I'm not using their router. Uh, = yeah, ok. Its not hardware -- the same thing happens on a pcEngines box = with two "igb" interfaces, a "cube" box that has two "re" interfaces and = my current box (which I want to keep using) that has two SFP+ interfaces = that come up on the "ix" driver. All behave exactly the same way. >=20 > If I call and bitch they reset everything on their end and it comes up = -- once and from there its stable. But if I take a power hit beyond my = UPS's capacity, well, it'll happen again. >=20 > I see absolutely nothing in tcpdump that implies there's a problem, = other than that when this happens they never answer anything I send = them. They claim their dhcp6 server has locked out my MAC due to = "invalid" things they're seeing from me. >=20 Do ( can ) they provide the details of the "invalid" things ? I'm = recently overhauling the attaching process of interfaces. For ethernet = interfaces, there're rare races that the driver see un-initialized = link-layer address ( 00:00:00:00:00:00 ) or incomplete link-layer = address ( occurs when renaming the interface ) . So I'm curious what = "invalid" things your provider sees. > Well, it can't be coming from the inside devices because (1) there's = no route until IPv6 comes up except for the link-local, which I verify = is in fact there but there is no default route until they send it and I = receive it and therefore its ridiculously implausible any inside device = with a "stale" IPv6 address is sending, and everything in the rack (this = last time at least) went down with the power and all that gets its IPv6 = by SLACC -- so until it gets a delegation it obviously didn't have any. >=20 > I'm trying to get their engineering people on the line to get a packet = capture while I power cycle and see exactly why they're getting big-mad = but my suspicion is that their ONT is in some way obtaining and = forwarding things before it negotiates fully -- which of course it = shouldn't, but..... >=20 > Any ideas here? Once it comes up its completely stable, but obviously = a power loss while I'm not around is going to be a pain in the neck. = One thing I've contemplated is sticking a delay in the rc script for = dhcpcd so it doesn't start for a bit after a boot, which perhaps gives = the port time to negotiate. Since it does the same thing with an igb, = re, and ix port (with a 1G SFP transceiver in it) I assume the issue has = nothing to do per se with negotiation, but somehow their end is getting = "big mad" with me when it comes to IPv6 delegations and once it does it = never clears it on its own. >=20 > Putting this in freebsd-net rather than directly to Roy because I see = the same behavior using the "stock" dhcp6c client...... >=20 > On 6/7/2024 09:12, Roy Marples wrote: >> Hi Ed >>=20 >> ---- On Thu, 06 Jun 2024 02:48:36 +0100 Ed Maste wrote --- >> > On Sun, 7 Aug 2022 at 01:32, Ben Woods woodsb02@freebsd.org = > wrote: >> > In the previous threads some objections were raised about dhcpcd's >> > lack of sandboxing (Capsicum / privilege separation), which has = since >> > been addressed. >> > >> > I would like to start building and installing dhcpcd by default so >> > that it is available for testing and experimentation. I do not = intend >> > to replace dhclent or rtsold, at least without more information, = test >> > results, and consensus. >>=20 >> That's nice news, thanks for carrying the torch here :) >>=20 > -- > Karl Denninger > karl@denninger.net > The Market Ticker > [S/MIME encrypted email preferred] Best regards, Zhenlei --Apple-Mail=_7E893E2C-C76B-41AF-9D20-3A8B69795A02 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii

On Jun 19, 2025, at 6:00 AM, Karl Denninger <karl@denninger.net> wrote:

Resurrecting an older thread....



Can you please point me to the thread ? I'd like to gather more context from that.
 

I have Kub Fiber here and have run into an interesting problem I've not seen on anything else (this same config, absent dhcpcd but on the stock FreeBSD config, worked fine on both Cox and Spectrum without changes.)

On a first use dhcpcd gets both IPv4 and IPv6 addresses, but sometimes the IPv4 side fails to be able to ARP (!!!!) the other end.  If I drop the interface (ifconfig ix0 down; ifconfig ix0 up) it never fails on the second try.  If it fails on the first try doing a "arp -d" on the other end resolves nothing; only recycling the interface does.  Once it comes up its 100% stable and never drops it.  Obviously with no arp for the other end you get nothing (in either direction.)

That I can handle (but its damned annoying) with a script that checks connection to the other side and, if it can't get anything, does the above.

The more serious problem is with Ipv6.  If I shut down my gear (and the company's ONT) and then turn the power back on (say, because I need to work on the UPS in my rack!) it will come back up on IpV4 but never gets an answer to the SOLICIT response.  It also never sees anything from the neighbor request!

In other words ("tcpdump -i ip6 ix0"):

14:42:25.301564 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:30.573650 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router solicitation, length 16
14:42:31.594474 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
14:42:32.690063 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
14:42:34.506030 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:34.574904 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router solicitation, length 16
14:42:34.764176 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
14:42:35.501814 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:35.934710 IP6 2a06:4880:4000::68.53490 > 2606:83c0:8000:ff00:ba27:ebff:fe39:701d.4567: Flags [S], seq 605251823, win 14600, options [mss 1440], length 0
14:42:36.509588 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:38.580627 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router solicitation, length 16
14:42:38.732812 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
14:42:40.337515 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:41.321509 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:42.329737 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:42.595011 IP6 fe80::2e0:b4ff:fe68:f894 > ff02::2: ICMP6, router solicitation, length 16
14:42:44.782492 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:45.749503 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:46.745515 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:47.109267 IP6 fe80::2e0:b4ff:fe68:f894.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
14:42:48.809742 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:49.805572 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32
14:42:50.801697 IP6 fe80::3a94:edff:fe47:f2f8 > ff02::1:ff0b:946d: ICMP6, neighbor solicitation, who has fe80::6a22:8e00:c80b:946d, length 32

The interface is up and is passing Ip4 traffic.

And even more odd I get this once in a while:

14:45:26.688858 IP6 enviable.census.internet-measurement.com.53565 > 2606:83c0:8600::10c.58222: Flags [S], seq 3619826346, win 14600, options [mss 1440], length 0
14:45:26.696834 IP6 stupendous.census.internet-measurement.com.53321 > 2606:83c0:8600::10c.rsf-1: Flags [S], seq 3940102705, win 14600, options [mss 1440], length 0

The prefix IS part of the provider's delegation but I have no IPv6 address so I have absolutely no idea how they think routing that to me is reasonable -- but they do.



For unwanted IPv6 packets, the net stack should drop them silently, and fundamentally you can NOT prevent your provider from sending them.  Also be aware that tcpdump(1) by default turns the interface into promisc mode. 

They're pointing at "my gear" as I'm not using their router.  Uh, yeah, ok.  Its not hardware -- the same thing happens on a pcEngines box with two "igb" interfaces, a "cube" box that has two "re" interfaces and my current box (which I want to keep using) that has two SFP+ interfaces that come up on the "ix" driver.  All behave exactly the same way.

If I call and bitch they reset everything on their end and it comes up -- once and from there its stable.  But if I take a power hit beyond my UPS's capacity, well, it'll happen again.

I see absolutely nothing in tcpdump that implies there's a problem, other than that when this happens they never answer anything I send them.  They claim their dhcp6 server has locked out my MAC due to "invalid" things they're seeing from me.

Do ( can ) they provide the details of the "invalid" things ? I'm recently overhauling the attaching process of interfaces. For ethernet interfaces, there're rare races that the driver see un-initialized link-layer address ( 00:00:00:00:00:00 ) or incomplete link-layer address ( occurs when renaming the interface ) . So I'm curious what "invalid" things your provider sees.

  Well, it can't be coming from the inside devices because (1) there's no route until IPv6 comes up except for the link-local, which I verify is in fact there but there is no default route until they send it and I receive it and therefore its ridiculously implausible any inside device with a "stale" IPv6 address is sending, and everything in the rack (this last time at least) went down with the power and all that gets its IPv6 by SLACC -- so until it gets a delegation it obviously didn't have any.

I'm trying to get their engineering people on the line to get a packet capture while I power cycle and see exactly why they're getting big-mad but my suspicion is that their ONT is in some way obtaining and forwarding things before it negotiates fully -- which of course it shouldn't, but..... 

Any ideas here?  Once it comes up its completely stable, but obviously a power loss while I'm not around is going to be a pain in the neck.  One thing I've contemplated is sticking a delay in the rc script for dhcpcd so it doesn't start for a bit after a boot, which perhaps gives the port time to negotiate.  Since it does the same thing with an igb, re, and ix port (with a 1G SFP transceiver in it) I assume the issue has nothing to do per se with negotiation, but somehow their end is getting "big mad" with me when it comes to IPv6 delegations and once it does it never clears it on its own.

Putting this in freebsd-net rather than directly to Roy because I see the same behavior using the "stock" dhcp6c client......

On 6/7/2024 09:12, Roy Marples wrote:
Hi Ed

 ---- On Thu, 06 Jun 2024 02:48:36 +0100  Ed Maste  wrote --- 
 > On Sun, 7 Aug 2022 at 01:32, Ben Woods woodsb02@freebsd.org> wrote:
 > In the previous threads some objections were raised about dhcpcd's
 > lack of sandboxing (Capsicum / privilege separation), which has since
 > been addressed.
 > 
 > I would like to start building and installing dhcpcd by default so
 > that it is available for testing and experimentation. I do not intend
 > to replace dhclent or rtsold, at least without more information, test
 > results, and consensus.

That's nice news, thanks for carrying the torch here :)
--
Karl Denninger
karl@denninger.net
The Market Ticker
[S/MIME encrypted email preferred]

Best regards,
Zhenlei

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