After I restarted networking (networking stop, ifconfig eth0 down, networking start, kill dhclient) ipv6 worked for a few hours. now it doesn't again:
[EMAIL PROTECTED]:~# ping6 2a00:801:b::1 PING 2a00:801:b::1(2a00:801:b::1) 56 data bytes ^C --- 2a00:801:b::1 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2013ms The commands asked for: [EMAIL PROTECTED]:# ip -6 n sh 2a00:801:b::1 dev eth0 lladdr 00:0a:42:dd:54:70 router REACHABLE [EMAIL PROTECTED]:# ip -6 r sh 2a00:801:b::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295 fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295 default via 2a00:801:b::1 dev eth0 metric 1 mtu 1500 advmss 1440 hoplimit 4294967295 [EMAIL PROTECTED]:# ip -6 a sh 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 inet6 ::1/128 scope host valid_lft forever preferred_lft forever 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 inet6 2a00:801:b::10/64 scope global valid_lft forever preferred_lft forever inet6 fe80::240:63ff:fef5:17c2/64 scope link valid_lft forever preferred_lft forever On the cisco: MikaelA7200Inf3#show ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface FE80::240:63FF:FEF5:17C2 1 0040.63f5.17c2 STALE Gi4/0 MikaelA7200Inf3#debug ipv6 icmp ICMP packet debugging is on MikaelA7200Inf3# Aug 31 23:42:34.898: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:42:34.898: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:42:35.914: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:42:35.914: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:42:36.914: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:42:36.914: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:42:37.914: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:42:37.914: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:42:39.898: ICMPv6: Received ICMPv6 packet from FE80::240:63FF:FEF5:17C2, type 135 Aug 31 23:42:44.898: ICMPv6: Received ICMPv6 packet from FE80::240:63FF:FEF5:17C2, type 136 MikaelA7200Inf3#debug ipv6 nd ICMP Neighbor Discovery events debugging is on Aug 31 23:43:47.158: ICMPv6-ND: DELETE -> INCMP: 2A00:801:B::10 Aug 31 23:43:47.158: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:48.158: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:48.170: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:43:48.170: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:43:49.158: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:49.170: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:43:49.170: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:43:50.158: ICMPv6-ND: INCMP deleted: 2A00:801:B::10 Aug 31 23:43:50.158: ICMPv6-ND: INCMP -> DELETE: 2A00:801:B::10 Aug 31 23:43:50.170: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:43:50.170: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:43:50.170: ICMPv6-ND: DELETE -> INCMP: 2A00:801:B::10 Aug 31 23:43:50.174: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:51.170: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:51.170: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:43:51.170: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:43:52.154: ICMPv6: Received ICMPv6 packet from FE80::240:63FF:FEF5:17C2, type 135 Aug 31 23:43:52.154: ICMPv6-ND: Received NS for 2A00:801:B::1 on GigabitEthernet4/0 from FE80::240:63FF:FEF5:17C2 Aug 31 23:43:52.158: ICMPv6-ND: Sending NA for 2A00:801:B::1 on GigabitEthernet4/0 Aug 31 23:43:52.158: ICMPv6-ND: STALE -> DELAY: FE80::240:63FF:FEF5:17C2 Aug 31 23:43:52.170: ICMPv6-ND: Sending NS for 2A00:801:B::10 on GigabitEthernet4/0 Aug 31 23:43:52.170: ICMPv6: Received echo request from 2A00:801:B::10 Aug 31 23:43:52.170: ICMPv6: Sending echo reply to 2A00:801:B::10 Aug 31 23:43:53.170: ICMPv6-ND: INCMP deleted: 2A00:801:B::10 Aug 31 23:43:53.170: ICMPv6-ND: INCMP -> DELETE: 2A00:801:B::10 [EMAIL PROTECTED]:~# tcpdump -n -p not ip tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 23:44:48.300611 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 1, length 64 23:44:49.313502 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 2, length 64 23:44:50.313515 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 3, length 64 23:44:51.313515 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 4, length 64 23:44:52.313516 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 5, length 64 23:44:53.297484 IP6 fe80::240:63ff:fef5:17c2 > 2a00:801:b::1: ICMP6, neighbor solicitation, who has 2a00:801:b::1, length 32 23:44:53.298330 IP6 2a00:801:b::1 > fe80::240:63ff:fef5:17c2: ICMP6, neighbor advertisement, tgt is 2a00:801:b::1, length 24 23:44:53.313530 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 6, length 64 23:44:54.313509 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 7, length 64 23:44:55.313516 IP6 2a00:801:b::10 > 2a00:801:b::1: ICMP6, echo request, seq 8, length 64 23:44:58.294962 IP6 fe80::20a:42ff:fedd:5470 > fe80::240:63ff:fef5:17c2: ICMP6, neighbor solicitation, who has fe80::240:63ff:fef5:17c2, length 32 23:44:58.295005 IP6 fe80::240:63ff:fef5:17c2 > fe80::20a:42ff:fedd:5470: ICMP6, neighbor advertisement, tgt is fe80::240:63ff:fef5:17c2, length 24 23:45:03.293474 IP6 fe80::240:63ff:fef5:17c2 > fe80::20a:42ff:fedd:5470: ICMP6, neighbor solicitation, who has fe80::20a:42ff:fedd:5470, length 32 23:45:03.294339 IP6 fe80::20a:42ff:fedd:5470 > fe80::240:63ff:fef5:17c2: ICMP6, neighbor advertisement, tgt is fe80::20a:42ff:fedd:5470, length 24 Cisco still shows: MikaelA7200Inf3#show ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface FE80::240:63FF:FEF5:17C2 1 0040.63f5.17c2 DELAY Gi4/0 2A00:801:B::10 0 - INCMP Gi4/0 MikaelA7200Inf3#show ipv6 int gi4/0 GigabitEthernet4/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::20A:42FF:FEDD:5470 Description: Hemmanet Global unicast address(es): 2A00:801:B::1, subnet is 2A00:801:B::/64 Joined group address(es): FF02::1 FF02::2 FF02::5 FF02::6 FF02::1:FF00:1 FF02::1:FFDD:5470 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds ICMP redirects are enabled ND DAD is enabled, number of DAD attempts: 1 ND reachable time is 30000 milliseconds ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. One thing that has changed though, is that before on hardy I used: net.ipv6.conf.default.accept_ra = 0 I seem to remember that I've seen that there was an error message at bootup regarding this. I don't want the linux box to use RA, but everything else should. I don't think this is related though... -- ipv6 stops working after a while https://bugs.launchpad.net/bugs/263260 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs