Hi, meanwhile I gathered some information from /proc/net/tcp6 on this problem - in case anyone is interested :-)
| 1144560959: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000000:00000000 02:00097F82 00000000 1000 0 3188619 8 c1409260 89 10 20 2 2 | 1144560969: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000074 00000004 1000 0 3188619 9 c1409260 1424 10 18 1 2 | 1144560980: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:000000FA 00000005 1000 0 3188619 9 c1409260 2848 10 18 1 2 | 1144560990: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:000005F2 00000006 1000 0 3188619 9 c1409260 5696 10 18 1 2 | 1144561000: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000205 00000006 1000 0 3188619 9 c1409260 5696 10 18 1 2 | 1144561010: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000FE4 00000007 1000 0 3188619 9 c1409260 11392 10 18 1 2 | 1144561020: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000BF6 00000007 1000 0 3188619 9 c1409260 11392 10 18 1 2 | 1144561030: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000809 00000007 1000 0 3188619 9 c1409260 11392 10 20 1 2 | 1144561040: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:0000041B 00000007 1000 0 3188619 9 c1409260 11392 10 20 1 2 | 1144561050: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:0000002E 00000007 1000 0 3188619 9 c1409260 11392 10 20 1 2 | 1144561060: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00001FDA 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561070: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00001BE7 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561080: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:000017F9 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561090: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:0000140B 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561100: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:0000101E 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561110: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000C30 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561120: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000842 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561130: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000455 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561140: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 01 00000016:00000000 01:00000067 00000008 1000 0 3188619 9 c1409260 22784 10 20 1 2 | 1144561150: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00002B5A 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561161: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:0000276C 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561171: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:0000237E 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561181: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00001F91 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561191: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00001BA3 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561201: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:000017B5 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561211: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:000013C2 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561221: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00000FD1 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561231: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00000BE3 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561241: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:000007F5 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561251: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:00000407 00000001 0 0 0 9 c1409260 30000 10 18 1 2 | 1144561261: 8: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1223 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx:1A0B 04 00000017:00000000 01:0000001A 00000001 0 0 0 9 c1409260 30000 10 18 1 2 (That number on the left is a unix timestamp, in case you didn't recognize it ... ;-) The corresponding packet dump shows the same behaviour as the previously posted one: None of the retransmissions that seem to happen according to this are visible with tcpdump. Well, any hints how to further debug this are welcome... Florian - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html