Date: Sun, 16 Sep 2018 16:05:41 -0500 From: Eric van Gyzen <eric@vangyzen.net> To: Kurt Jaeger <pi@freebsd.org> Cc: freebsd-current@freebsd.org, freebsd-net@freebsd.org Subject: Re: Bad DHCP Checksums over VLANs Message-ID: <794ae64b-54d8-cfde-2e9c-87b3b74e0516@vangyzen.net> In-Reply-To: <20180915060615.GF2118@home.opsec.eu> References: <9dd3c7f9-d970-5d30-ebf2-c0f40c76011b@vangyzen.net> <20180915060615.GF2118@home.opsec.eu>
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On 9/15/18 1:06 AM, Kurt Jaeger wrote: > Can you disable all the options of the NIC ? > > ifconfig igb0 -rxcsum -txcsum -wol -tso4 -vlanmtu -vlanhwtag -vlanhwcsum -vlanhwtso > > Try to disable everything that can be disabled, e.g. LRO etc. Disabling vlanhwtag works around the problem. Also note that only DHCP traffic has this problem. If I assign an address manually, all traffic flows normally. Maybe the problem is in the BPF send path. Eric
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