default route via SLAAC not working ?

[Mike Tancsa]

On 7/31/2017 2:13 PM, Trond Endrestøl wrote:
> 
> That's strange. I've never seen such behaviour before.
> Maybe a packet capture can provide more clues.

Not sure whats going on from the pcap. I dont see any values in there
that would tell the kernel to expire a setting in less than 5min

	---Mike


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/
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14:38:57.391700 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
14:48:50.682370 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
14:54:51.630851 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
15:01:01.323075 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
15:10:52.736332 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
15:17:46.024235 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137
15:23:04.904394 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 64
        hop limit 64, Flags [managed, other stateful], pref high, router lifetime 1800s, reachable time 0s, retrans time 0s
          prefix info option (3), length 32 (4): 2605:8d80:6e6:7cad::/64, Flags [onlink, auto], valid time 7200s, pref. time 3600s
            0x0000:  40c0 0000 1c20 0000 0e10 0000 0000 2605
            0x0010:  8d80 06e6 7cad 0000 0000 0000 0000
          mtu option (5), length 8 (1):  1460
            0x0000:  0000 0000 05b4
          source link-address option (1), length 8 (1): a4:71:74:2b:c1:37
            0x0000:  a471 742b c137