On Sun, 18 Nov 2001, NDSoftware wrote: Ok, these pings look sane. A few pointers on what to check. - Make sure Woody is listening to solicited-node multicast address (ff02::1:fe01:811b) -- netstat -g - Make sure Router is listening to solicited-node multicast address (ff02::1:ff34:1d91) -- netstat -g - Make sure the ethernet interfaces have MULTICAST flag in them (ifconfig) - If you are using PCMCIA cards, you could try also putting ALLMULTI flag on the interface(s); e.g. Xircom cards are buggy in this aspect. - Make sure Woody's link local address is configured properly; before this, check that loopback0 is up, then: /sbin/ip -6 a a fe80::2d0:70ff:fe01:811b/10 dev eth0 - Make sure Router's link local address is configured properly; before this, check that loopback0 is up, then: /sbin/ip -6 a a fe80::a0:2434:1d91/10 dev eth2 - Capture tcpdump on woody with 'tcpdump -vvv -s 500 -w tcpdump.log -n ip6' and send the file to me privately. I'm mostly interested in possible neighbour solicitation options that are used. - Show the most up-to-date routing table on both nodes. Preferable output is '/sbin/ip -6 r l'. - Show the most up-to-date interface addresses on both nodes. Preferable output is '/sbin/ip -6 a l'. The latter could also be mailed to me directly if you prefer. I hope this is enough to get started.. > On Woody, i ping router: > > ping6 -I eth0 fe80::a0:2434:1d91 > PING fe80::a0:2434:1d91(fe80::a0:2434:1d91) from > fe80::2d0:70ff:fe01:811b eth0: 56 data bytes > >From ::1 icmp_seq=1 Destination unreachable: Address unreachableFrom ::1 > icmp_seq=2 Destination unreachable: Address unreachableFrom ::1 > icmp_seq=3 Destination unreachable: Address unreachable > --- fe80::a0:2434:1d91 ping statistics --- > 6 packets transmitted, 0 received, +3 errors, 100% loss, time 5026ms > > On router, when i try to ping it from Woody: > > 14:12:15.259604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > 14:12:16.259604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > 14:12:17.259604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > 14:12:18.289604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > 14:12:19.289604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > 14:12:20.289604 fe80::2d0:70ff:fe01:811b > ff02::1:ff34:1d91: icmp6: > neighbor sol: who has fe80::a0:2434:1d91 > > On router, i ping Woody: > > PING fe80::2d0:70ff:fe01:811b(fe80::2d0:70ff:fe01:811b) from > fe80::a0:2434:1d91 eth2: 56 data bytes > >From ip6-localhost: Destination unreachable: Address unreachable > >From ip6-localhost: Destination unreachable: Address unreachable > >From ip6-localhost: Destination unreachable: Address unreachable > > --- fe80::2d0:70ff:fe01:811b ping6 statistics --- > 4 packets transmitted, 0 packets received, 100% packet loss > > On Woody, when i try to ping it from router: > > 14:10:35.301780 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b > 14:10:36.294003 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b > 14:10:37.293058 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b > 14:10:38.296243 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b > 14:10:39.292719 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b > 14:10:40.293872 fe80::a0:2434:1d91 > ff02::1:fe01:811b: icmp6: neighbor > sol: who has fe80::2d0:70ff:fe01:811b -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
