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
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