Date: Mon, 08 Mar 2021 20:18:19 +0100 From: Lars Schotte <lars@gustik.eu> To: freebsd-current@freebsd.org Subject: FreeBSD 13.0-RC1 ethertype IPv6 (0x86dd), length 2942 on 1500 MTU Message-ID: <2a8d7089955ca70cd4e0e644aef988ca4a9019e3.camel@gustik.eu>
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Hey friends, I am running this FreeBSD 13.0-RC1 and I am experiencing strange Ethernet frame sizes, TCP sizes well above 2500 on an MTU of 1500. Somehow it seems that this problem only applies on IPv6, IPv4 works fine. I have seen some strange network behaviour with TCP connections randomly dropping under load, and now I see that they are too big. MSS-MAX on PF also does not help. It seems to ignore my 1440 setting. Something is broken here and I do not know what. Is anyone else experiencing this on IPv6? -- Lars Schotte Mudroňova 13 92101 Piešťany
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