I also suffer from this issue for a long time. All my computers work fine, however my Ubuntu homeserver running virtual machines have problems when I try to connect to them over IPv6 locally. They work at first and then suddenly it stops working due to the neighbour advertisement not reaching my router.
I can see the advertisement is being send on the actual host or vm's, but that packet is not visible on the router or the clients. So this is a bug in the bridge I guess? I really need a fix for this, can someone explain the workaround for me? Also, why is this bug not updated anymore? Was it fixed, or not reproducable? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1502238 Title: bridge does not forward neighbor solicitation packets Status in linux package in Ubuntu: Expired Bug description: 3 hosts involved here: kailan is connected to a cisco switch, which is also connected to kurrat (eth3), which is running a bridge with tigernut connected to eth1. kurrat's controllers are 06:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection, using the e1000e driver (3.13.0-65-generic kernel) (while kailan is doing a ping6 2601:282:8100:3500:82ee:73ff:fe99:368d): +kurrat 324 : sudo tcpdump -eni eth3 ip6 and not tcp and not udp tcpdump: WARNING: eth3: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth3, link-type EN10MB (Ethernet), capture size 65535 bytes 10:39:16.080888 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:16.431484 00:1c:c0:83:32:40 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::21c:c0ff:fe83:3240 > ff02::1: ICMP6, router advertisement, length 56 10:39:17.077446 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:18.077457 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:19.095034 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:20.093436 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:21.093425 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 10:39:21.430000 00:1c:c0:83:32:40 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::21c:c0ff:fe83:3240 > ff02::1: ICMP6, router advertisement, length 56 10:39:22.111042 00:1c:c0:83:32:40 > 33:33:ff:99:36:8d, ethertype IPv6 (0x86dd), length 86: 2601:282:8100:3500::1 > ff02::1:ff99:368d: ICMP6, neighbor solicitation, who has 2601:282:8100:3500:82ee:73ff:fe99:368d, length 32 ^C 10 packets captured 11 packets received by filter 0 packets dropped by kernel +kurrat 325 : sudo tcpdump -eni eth1 ip6 and not tcp and not udp tcpdump: WARNING: eth1: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 10:39:28.201110 00:1c:c0:83:32:40 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::21c:c0ff:fe83:3240 > ff02::1: ICMP6, router advertisement, length 56 10:39:31.552677 00:1c:c0:83:32:40 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::21c:c0ff:fe83:3240 > ff02::1: ICMP6, router advertisement, length 56 10:39:38.103919 08:10:78:fc:b3:d2 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 90: fe80::a10:78ff:fefc:b3d2 > ff02::1: HBH ICMP6, multicast listener query v2 [gaddr ::], length 28 10:39:39.663357 00:1c:c0:83:32:40 > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::21c:c0ff:fe83:3240 > ff02::1: ICMP6, router advertisement, length 56 ^C 4 packets captured 4 packets received by filter 0 packets dropped by kernel 1 packet dropped by interface +kurrat 326 : uname -a Linux kurrat 3.13.0-65-generic #105-Ubuntu SMP Mon Sep 21 18:50:58 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Adding a host route for the 2001:: IP via the link IP on kailan works as a workaround, but the neighbor solicitiation packets are clearly not getting through the bridge. No firewall is configured on kurrat. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1502238/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
