> On 20. Feb 2021, at 05:32, Doug Hardie <bc...@lafn.org> wrote: > >> On 19 February 2021, at 01:48, Michael Tuexen >> <michael.tue...@lurchi.franken.de> wrote: >> >>> On 19. Feb 2021, at 03:29, Doug Hardie <bc...@lafn.org> wrote: >>> >>> I don't know if this is a feature or a bug. On FreeBSD 9, the following >>> ping worked: >>> >>> 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=40+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=0 hlim=255 time=0.393 >> ms >> 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=1 hlim=255 time=0.419 >> ms >> 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=2 hlim=255 time=0.354 >> ms >> 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=3 hlim=255 time=0.446 >> ms >> 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=4 hlim=255 time=0.421 >> ms >> 5008 bytes from fe80::2e09:4dff:fe00:c00%re0, icmp_seq=5 hlim=255 time=0.372 >> 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 = 0.354/0.401/0.446/0.031 ms >> >> Best regards >> Michael >>> >>> It had to be stopped, but it returned the number of ping responses received >>> along with statistics. >>> >>> 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. >>> >>> Without the -s and -b arguments, it works and you get 100% packets received. > > I found the problem. pf does not handle IPv6 packets that are fragmented the > obvious way. I suspect it is because icmp header is only in the first > fragment. I had to reassemble fragments in pf in order to make the large > pings work. Glad you found the problem. Thanks for letting us know.
Best regards Michael > > -- Doug > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
