Date: Fri, 19 Feb 2021 10:48:45 +0100 From: Michael Tuexen <michael.tuexen@lurchi.franken.de> To: Doug Hardie <bc979@lafn.org> Cc: "net@freebsd.org" <net@FreeBSD.org> Subject: Re: IPv6 Fragmentation Message-ID: <472A2B49-9BEC-4335-B6FB-AC4DAA0F0310@lurchi.franken.de> In-Reply-To: <CB0FB5AB-5A37-4C40-A103-3E0D97CEA6B9@sermon-archive.info> References: <CB0FB5AB-5A37-4C40-A103-3E0D97CEA6B9@sermon-archive.info>
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> On 19. Feb 2021, at 03:29, Doug Hardie <bc979@lafn.org> wrote: >=20 > I don't know if this is a feature or a bug. On FreeBSD 9, the = following ping worked: >=20 > ping6 -s 5000 -b 6000 fe80::213:72ff:fec3:180f%dc0 I don't have a dc0 interface, but using re0 at one side and bge at the = other, I get with FreeBSD CURRENT: tuexen@cirrus:~ % ping6 -s 5000 -b 6000 fe80::2e09:4dff:fe00:c00%re0 PING6(5048=3D40+8+5000 bytes) fe80::aaa1:59ff:fe0c:da92%re0 --> = fe80::2e09:4dff:fe00:c00%re0 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D0 hlim=3D255 = time=3D0.393 ms 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D1 hlim=3D255 = time=3D0.419 ms 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D2 hlim=3D255 = time=3D0.354 ms 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D3 hlim=3D255 = time=3D0.446 ms 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D4 hlim=3D255 = time=3D0.421 ms 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3D5 hlim=3D255 = time=3D0.372 ms ^C --- fe80::2e09:4dff:fe00:c00%re0 ping6 statistics --- 6 packets transmitted, 6 packets received, 0.0% packet loss round-trip min/avg/max/std-dev =3D 0.354/0.401/0.446/0.031 ms Best regards Michael >=20 > It had to be stopped, but it returned the number of ping responses = received along with statistics. >=20 > With FreeBSD 12.2 and 13.0-BETA2, it returns 100% packet loss. = tcpdump shows that it properly fragments the data, sends it, the other = end receives it and sends back the ACKs. The ACKs are received, but = somehow ping doesn't find out that the packets were received. >=20 > Without the -s and -b arguments, it works and you get 100% packets = received. >=20 > -- Doug >=20 > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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