Date: Mon, 15 Sep 2025 13:20:16 -0400 From: Chris Ross <cross+freebsd@distal.com> To: Karl Denninger <karl@denninger.net> Cc: freebsd-net@freebsd.org, Roy Marples <roy@marples.name> Subject: Re: IPv6 networking problems in 14.3 Message-ID: <A8F67A5F-70B1-4336-B6AA-FBAC48F7000C@distal.com> In-Reply-To: <092f8b7a-9b98-4e2a-b6c5-361b40549cce@denninger.net> References: <4C00D174-21FE-47C4-A30A-A382138571A5@keehole.org> <A9EBD993-D77D-49F9-9FFB-0E42EA0BEE6E@keehole.org> <DC84D8EC-B084-4AF1-B3F4-413323DA613A@distal.com> <dfa7af0c-334f-4b36-86dc-b2d75d1477d3@denninger.net> <E06E4F40-0E2C-4C4E-9C27-3BCF086347FA@distal.com> <6fce77fb-9ba8-4c7b-bb9b-0e337d91f278@denninger.net> <1780EFAC-DA9C-4593-BE37-28E7FFCE4388@distal.com> <6e7a8fc6-12c8-4097-ad70-bcb1e4967ade@denninger.net> <092f8b7a-9b98-4e2a-b6c5-361b40549cce@denninger.net>
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[-- Attachment #1 --]
> On Sep 15, 2025, at 08:59, Karl Denninger <karl@denninger.net> wrote:
>
> Hmmmmm.... just came in via git pull:
>
> dhclient: improve UDP checksum handling
>
> This could potentially apply to other bpf-using things -- which includes dhcpcd. And you have tso/lro turned on.
>
> It is a patch to dhclient, not dhcpcd but does the same issue potentially apply?
>
I don’t know, but I think that isn’t my problem. It seems like the NS that
dhcpcd is sending is alright, and tcpdump doesn’t see an NA coming
back in at all.
- Chris
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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Sep 15, 2025, at 08:59, Karl Denninger <karl@denninger.net> wrote:</div><br class="Apple-interchange-newline"><div>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div><p>Hmmmmm.... just came in via git pull:</p><p> dhclient: improve UDP checksum handling<br>
<br>This could potentially apply to other bpf-using things -- which
includes dhcpcd. And you have tso/lro turned on.</p><p>It is a patch to dhclient, not dhcpcd but does the same issue
potentially apply?</p></div></div></blockquote><div><br></div>I don’t know, but I think that isn’t my problem. It seems like the NS that</div><div>dhcpcd is sending is alright, and tcpdump doesn’t see an NA coming</div><div>back in at all.</div><div><br></div><div>- Chris</div><div><br></div></body></html>
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