I ran the cron script for 14 hours, still worked, then I did the
following:
MikaelA7200Inf3#clear ipv6 neighbors
MikaelA7200Inf3#show ipv6 neighbors
MikaelA7200Inf3#
Now ping doesn't work again.
08:01:23.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 213
08:01:24.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 214
08:01:25.566346 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 32)
fe80::240:63ff:fef5:17c2 > 2a00:801:b::1: [icmp6 sum ok] ICMP6, neighbor
solicitation, length 32, who has 2a00:801:b::1
source link-address option (1), length 8 (1): 00:40:63:f5:17:c2
0x0000: 0040 63f5 17c2
08:01:25.566992 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 215
08:01:25.567307 IP6 (class 0xe0, hlim 255, next-header ICMPv6 (58) payload
length: 24) 2a00:801:b::1 > fe80::240:63ff:fef5:17c2: [icmp6 sum ok] ICMP6,
neighbor advertisement, length 24, tgt is 2a00:801:b::1, Flags [router,
solicited]
08:01:26.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 216
08:01:27.566374 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 217
08:01:28.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 218
08:01:29.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 219
08:01:30.564590 IP6 (class 0xe0, hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::20a:42ff:fedd:5470 > fe80::240:63ff:fef5:17c2: [icmp6 sum ok]
ICMP6, neighbor solicitation, length 32, who has fe80::240:63ff:fef5:17c2
source link-address option (1), length 8 (1): 00:0a:42:dd:54:70
0x0000: 000a 42dd 5470
08:01:30.564622 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 24)
fe80::240:63ff:fef5:17c2 > fe80::20a:42ff:fedd:5470: [icmp6 sum ok] ICMP6,
neighbor advertisement, length 24, tgt is fe80::240:63ff:fef5:17c2, Flags
[solicited]
08:01:30.566380 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 220
08:01:31.566377 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 221
08:01:32.566375 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64)
2a00:801:b::10 > 2a00:801::f: [icmp6 sum ok] ICMP6, echo request, length 64,
seq 222
on the cisco router:
Sep 3 08:01:22.567: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:23.567: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:24.567: ICMPv6-ND: INCMP deleted: 2A00:801:B::10
Sep 3 08:01:24.567: ICMPv6-ND: INCMP -> DELETE: 2A00:801:B::10
Sep 3 08:01:24.567: ICMPv6-ND: DELETE -> INCMP: 2A00:801:B::10
Sep 3 08:01:24.567: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:25.563: ICMPv6-ND: Received NS for 2A00:801:B::1 on
GigabitEthernet4/0 from FE80::240:63FF:FEF5:17C2
Sep 3 08:01:25.563: ICMPv6-ND: Sending NA for 2A00:801:B::1 on
GigabitEthernet4/0
Sep 3 08:01:25.563: ICMPv6-ND: STALE -> DELAY: FE80::240:63FF:FEF5:17C2
Sep 3 08:01:25.567: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:26.567: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:27.568: ICMPv6-ND: INCMP deleted: 2A00:801:B::10
Sep 3 08:01:27.568: ICMPv6-ND: INCMP -> DELETE: 2A00:801:B::10
Sep 3 08:01:27.568: ICMPv6-ND: DELETE -> INCMP: 2A00:801:B::10
Sep 3 08:01:27.568: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:28.568: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:29.568: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
Sep 3 08:01:30.564: ICMPv6-ND: DELAY -> PROBE: FE80::240:63FF:FEF5:17C2
Sep 3 08:01:30.564: ICMPv6-ND: Sending NS for FE80::240:63FF:FEF5:17C2 on
GigabitEthernet4/0
Sep 3 08:01:30.564: ICMPv6-ND: Received NA for FE80::240:63FF:FEF5:17C2 on
GigabitEthernet4/0 from FE80::240:63FF:FEF5:17C2
Sep 3 08:01:30.564: ICMPv6-ND: PROBE -> REACH: FE80::240:63FF:FEF5:17C2
Sep 3 08:01:30.568: ICMPv6-ND: INCMP deleted: 2A00:801:B::10
Sep 3 08:01:30.568: ICMPv6-ND: INCMP -> DELETE: 2A00:801:B::10
Sep 3 08:01:30.568: ICMPv6-ND: DELETE -> INCMP: 2A00:801:B::10
Sep 3 08:01:30.568: ICMPv6-ND: Sending NS for 2A00:801:B::10 on
GigabitEthernet4/0
MikaelA7200Inf3#show ipv6 neighbors
IPv6 Address Age Link-layer Addr State Interface
FE80::240:63FF:FEF5:17C2 0 0040.63f5.17c2 REACH Gi4/0
2A00:801:B::10 0 - INCMP Gi4/0
Don't know if this helps? ufw is not enabled, ipchains is empty.
--
ipv6 stops working after a while
https://bugs.launchpad.net/bugs/263260
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