> -----Original Message----- > From: Pekka Savola [mailto:pekkas@netcore.fi] > Sent: Sunday, November 18, 2001 12:28 PM > To: NDSoftware > Cc: linux-net@vger.kernel.org > Subject: RE: ip6-localhost (::1) 2990.86 ms !H -> Why ? > > > On Sun, 18 Nov 2001, NDSoftware wrote: > > > Capture traffic with 'tcpdump -i interface -n ip6' on both > > > ends and see > > > that the messages (ICMP neighbour solications, when you ping6 > > > the other > > > end's link-local address) get through. > > > > On router: > > > > 12:15:39.109604 0:d0:70:1:81:1b 33:33:ff:0:0:1 86dd 86: > > 6000 0000 0020 3aff 3ffe 8271 2101 0001 > > 0000 0000 0000 0001 ff02 0000 0000 0000 > > 0000 0001 ff00 0001 8700 d1ab 0000 0000 > > 3ffe 8271 1000 > > I suggest you upgrade tcpdump to at least 3.6.2, to get IPv6 > enabled. It's difficult to say whether these are the same packets. Yes but Debian Potato (router) have not this package version (only 3.4.x), only Woody have this. I can't compile on the router (Potato) because it's only a 486. > > > On Woody: > > > > 21:38:02.882404 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: > neighbor sol: > > who has 3ffe:8271:2101:1::1 > > 21:38:03.882226 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: > neighbor sol: > > who has 3ffe:8271:2101:1::1 > > As said, use link-local addresses. > > > > Another explanation for this is that IPv6 neighbour > discovery code is > > > messed up. This can happen if you take down your loopback > > > interface. > > > > ifdown lo and after: > > I'm not sure what you mean by this. In Red Hat Linux terms: > > Works: > > - ifdown lo ; ifup lo # ifdown lo # ifup lo # traceroute6 www.6bone.net traceroute to 6bone.net (3ffe:b00:c18:1::10) from 3ffe:8271:2101:1::1, 30 hops max, 16 byte packets 1 * * * 2 * * * 3 * * * 4 * * * I have try too this routes: Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface ::1/128 :: U 0 0 0 lo 2001::/16 3ffe:8271:1000:22::1 UG 1 0 0 eth0 2002::/16 3ffe:8271:1000:22::1 UG 1 0 0 eth0 3ffe:8271:1000:22::/64 :: U 1 3 0 eth0 3ffe:8271:2101:1::/64 :: UA 256 0 0 eth0 3ffe::/16 3ffe:8271:1000:22::1 UG 1 14 0 eth0 fe80::/10 :: UA 256 0 0 eth0 ff00::/8 :: UA 256 0 0 eth0 > > Doesn't fix the problem: > > - ifconfig lo down ; ifconfig lo up > (plus possibly readded routes) > > ==> you would have to re-add addresses like ::1/128 on the > interface too > (even though they already exist there) > > > traceroute to 6bone.net (3ffe:b00:c18:1::10) from > 3ffe:8271:2101:1::1, > > 30 hops max, 16 byte packets > > 1 * * * > > 2 * * * > > 3 * * > > > > traceroute to 3ffe:8271:1000:22::1 (3ffe:8271:1000:22::1) from > > 3ffe:8271:2101:1::1, 30 hops max, 16 byte packets > > 1 * * * > > 2 * > > Using global addresses depend on a lot of other configuration > being right > too. Use only link-local when debugging until that works properly. > Yes but the link-local don't work: I i ping Woody on router: PING fe80::2d0:70ff:fe01:811b(fe80::2d0:70ff:fe01:811b) from fe80::10:4b44:56cc eth0: 56 data bytes >From ip6-localhost: Destination unreachable: Address unreachable >From ip6-localhost: Destination unreachable: Address unreachable >From ip6-localhost: Destination unreachable: Address unreachable But i understand why i have: 13:14:22.168116 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: neighbor sol: who has 3ffe:8271:2101:1::1 13:14:23.158696 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: neighbor sol: who has 3ffe:8271:2101:1::1 13:14:24.158518 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: neighbor sol: who has 3ffe:8271:2101:1::1 13:14:25.179880 3ffe:8271:1000:22::1 > ff02::1:0:1: icmp6: neighbor sol: who has 3ffe:8271:2101:1::1 Why it don't find Woody (3ffe:8271:2101:1::1) ? > -- > 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
