Public bug reported:
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1502238
Title:
bridge does not forward neighbor solicitation packets
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