Date: Fri, 02 May 2003 21:06:38 -0700 From: Raymond Jimenez <raymond@chikage.wsyntax.com> To: freebsd-net@freebsd.org Subject: IPv6 Neighbor Discovery Problem with dc(4) Message-ID: <3EB3404E.5030103@chikage.wsyntax.com>
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On my network, several machines are having trouble recognizing an icmp6 neighbor solicitation. This only happens to me when I use the dc driver, in combination with the ADMTek AN985 10/100BaseTX chipset. The machines are running a combination of 4.7 and -CURRENT. The network topology consists of 3 switches, 2 of Linksys make, and 1 of Gigafast make. The computers will not recognize each other even when on the same switch. Tcpdump on the sender of the packet shows that the other interface (should be) reciving the packets, but is sending out no reply. When two computers are using any other driver than dc(4), they can ping each other. However, when tcpdump is done on the system with dc, the other can ping it and send data packets back and forth. It continues working after tcpdump is stopped. I've searched, and found nothing. Is there something I should check? Thanks in advance. -- Below is the output of tcpdump -nlvvve ip6 (on the system that is ping6'ing the one with the dc(4) driver) [raymond@shirayuki raymond]$ sudo tcpdump -nlevvv ip6 | tee Password: tcpdump: listening on ep0 20:57:37.306117 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:38.306194 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:39.306283 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:41.306427 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:42.306501 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:43.306572 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:45.306743 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) 20:57:46.306801 0:60:97:93:af:d0 33:33:ff:1a:49:c8 86dd 86: 2001:470:1f00:256:260:97ff:fe93:afd0 > ff02::1:ff1a:49c8: icmp6: neighbor sol: who has 2001:470:1f00:256:203:6dff:fe1a:49c8(src lladdr: 00:60:97:93:af:d0) (len 32, hlim 255) ^C 47 packets received by filter 0 packets dropped by kernel [raymond@shirayuki raymond]$ ping6 sakura.wsyntax.com PING6(56=40+8+8 bytes) 2001:470:1f00:256:260:97ff:fe93:afd0 --> 2001:470:1f00:256:203:6dff:fe1a:49c8 ^C --- sakura.wsyntax.com ping6 statistics --- 56 packets transmitted, 0 packets received, 100% packet loss -- Raymond Jimenez <raymond@chikage.wsyntax.com> http://chikage.wsyntax.com <> cyanoacry@rakka.irc.wsyntax.com
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