Gigaclear & ip6 - lose of connectivity after *exactly* 5 minutes

ahxcjay

Hi -

Running 24.11 of pfSense Plus with all available patches applied.

My (UK) ISP, Gigaclear, has recently enabled v6 (they assign us a /48) across their network. Exactly 5 minutes after v6 is brought up all v6 traffic stops. If I go to Interfaces > WAN and hit 'save', 'apply', v6 works again. For exactly 5 minutes. Rinse and repeat.

I see a fellow customer experiencing the exact same issue here: https://www.ispreview.co.uk/talk/threads/anyone-noticed-if-gigaclear-have-deployed-ipv6.43168/post-411379

Notably, it doesn't matter which options I select in WAN > DHCP6 Configuration, the issue remains. Here are what I believe the relevant parts from my pfSense log. If I have missed any other logs, or outputs which could be helpful, please let me know and I will supply them.

I'm (trying) to raise this up to Gigaclear, will report back if I hear from them.
Is this a BSD / Sense issue, or a 'my ISP' issue?

Mar 28 21:20:59	dhcp6c	14051	advertise contains no address/prefix
Mar 28 21:20:59	dhcp6c	14051	server ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00, pref=-1
Mar 28 21:20:59	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:20:59	dhcp6c	14051	status code: no addresses
Mar 28 21:20:59	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:20:59	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:20:59	dhcp6c	14051	get DHCP option identity association, len 59
Mar 28 21:20:59	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:20:59	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:20:59	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:20:59	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:20:59	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:20:59	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:20:59	dhcp6c	14051	receive advertise from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:20:59	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=7, retrans=117984
Mar 28 21:20:59	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:20:59	dhcp6c	14051	set option request (len 4)
Mar 28 21:20:59	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:20:59	dhcp6c	14051	set identity association
Mar 28 21:20:59	dhcp6c	14051	set client ID (len 14)
Mar 28 21:20:59	dhcp6c	14051	Sending Solicit
Mar 28 21:19:58	dhcp6c	14051	advertise contains no address/prefix
Mar 28 21:19:58	dhcp6c	14051	server ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00, pref=-1
Mar 28 21:19:58	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:19:58	dhcp6c	14051	status code: no addresses
Mar 28 21:19:58	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:19:58	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:19:58	dhcp6c	14051	get DHCP option identity association, len 59
Mar 28 21:19:58	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:19:58	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:19:58	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:19:58	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:19:58	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:19:58	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:19:58	dhcp6c	14051	receive advertise from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:19:58	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=6, retrans=60644
Mar 28 21:19:58	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:19:58	dhcp6c	14051	set option request (len 4)
Mar 28 21:19:58	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:19:58	dhcp6c	14051	set identity association
Mar 28 21:19:58	dhcp6c	14051	set client ID (len 14)
Mar 28 21:19:58	dhcp6c	14051	Sending Solicit
Mar 28 21:19:26	dhcp6c	14051	advertise contains no address/prefix
Mar 28 21:19:26	dhcp6c	14051	server ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00, pref=-1
Mar 28 21:19:26	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:19:26	dhcp6c	14051	status code: no addresses
Mar 28 21:19:26	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:19:26	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:19:26	dhcp6c	14051	get DHCP option identity association, len 59
Mar 28 21:19:26	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:19:26	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:19:26	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:19:26	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:19:26	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:19:26	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:19:26	dhcp6c	14051	receive advertise from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:19:26	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=5, retrans=31512
Mar 28 21:19:26	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:19:26	dhcp6c	14051	set option request (len 4)
Mar 28 21:19:26	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:19:26	dhcp6c	14051	set identity association
Mar 28 21:19:26	dhcp6c	14051	set client ID (len 14)
Mar 28 21:19:26	dhcp6c	14051	Sending Solicit
Mar 28 21:19:10	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=4, retrans=16549
Mar 28 21:19:10	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:19:10	dhcp6c	14051	set option request (len 4)
Mar 28 21:19:10	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:19:10	dhcp6c	14051	set identity association
Mar 28 21:19:10	dhcp6c	14051	set client ID (len 14)
Mar 28 21:19:10	dhcp6c	14051	Sending Solicit
Mar 28 21:19:02	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=3, retrans=8250
Mar 28 21:19:02	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:19:02	dhcp6c	14051	set option request (len 4)
Mar 28 21:19:02	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:19:02	dhcp6c	14051	set identity association
Mar 28 21:19:02	dhcp6c	14051	set client ID (len 14)
Mar 28 21:19:02	dhcp6c	14051	Sending Solicit
Mar 28 21:18:57	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=2, retrans=4286
Mar 28 21:18:57	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:18:57	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:57	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:57	dhcp6c	14051	set identity association
Mar 28 21:18:57	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:57	dhcp6c	14051	Sending Solicit
Mar 28 21:18:55	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=1, retrans=2114
Mar 28 21:18:55	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:18:55	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:55	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:55	dhcp6c	14051	set identity association
Mar 28 21:18:55	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:55	dhcp6c	14051	Sending Solicit
Mar 28 21:18:54	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=0, retrans=1091
Mar 28 21:18:54	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:18:54	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:54	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:54	dhcp6c	14051	set identity association
Mar 28 21:18:54	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:54	dhcp6c	14051	a new XID (3e2a43) is generated
Mar 28 21:18:54	dhcp6c	14051	Sending Solicit
Mar 28 21:18:54	dhcp6c	14051	got an expected reply, sleeping.
Mar 28 21:18:54	dhcp6c	14051	removing server (ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00)
Mar 28 21:18:54	dhcp6c	14051	removing an event on igb0, state=REQUEST
Mar 28 21:18:54	dhcp6c	14051	script "/var/etc/dhcp6c_wan_script.sh" terminated
Mar 28 21:18:54	dhcp6c	12849	dhcp6c RELEASE, REQUEST or EXIT on igb0 running rc.newwanipv6
Mar 28 21:18:54	dhcp6c	14051	executes /var/etc/dhcp6c_wan_script.sh
Mar 28 21:18:54	dhcp6c	14051	reset a timer on igb0, state=INIT, timeo=0, retrans=192
Mar 28 21:18:54	dhcp6c	14051	remove an IA: NA-0
Mar 28 21:18:54	dhcp6c	14051	IA NA-0 is invalidated
Mar 28 21:18:54	dhcp6c	14051	status code for NA-0: no addresses
Mar 28 21:18:54	dhcp6c	14051	make an IA: NA-0
Mar 28 21:18:54	dhcp6c	14051	add an address 2a06:61c1:ba35:30:6662:66ff:fe21:6b75/64 on igb1.20
Mar 28 21:18:54	dhcp6c	14051	add an address 2a06:61c1:ba35:20:6662:66ff:fe21:6b75/64 on igb1.30
Mar 28 21:18:54	dhcp6c	14051	add an address 2a06:61c1:ba35:10:6662:66ff:fe21:6b75/64 on igb1
Mar 28 21:18:54	dhcp6c	14051	create a prefix 2a06:61c1:ba35::/48 pltime=86400, vltime=86400
Mar 28 21:18:54	dhcp6c	14051	make an IA: PD-0
Mar 28 21:18:54	dhcp6c	14051	nameserver[1] 2a02:fb8:3:300::3
Mar 28 21:18:54	dhcp6c	14051	nameserver[0] 2a02:fb8:2:200::3
Mar 28 21:18:54	dhcp6c	14051	dhcp6c Received REQUEST
Mar 28 21:18:54	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:18:54	dhcp6c	14051	IA_PD prefix: 2a06:61c1:ba35::/48 pltime=86400 vltime=39466454569344
Mar 28 21:18:54	dhcp6c	14051	get DHCP option IA_PD prefix, len 25
Mar 28 21:18:54	dhcp6c	14051	IA_PD: ID=0, T1=43200, T2=69120
Mar 28 21:18:54	dhcp6c	14051	get DHCP option IA_PD, len 41
Mar 28 21:18:54	dhcp6c	14051	status code: no addresses
Mar 28 21:18:54	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:18:54	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:18:54	dhcp6c	14051	get DHCP option identity association, len 59
Mar 28 21:18:54	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:18:54	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:18:54	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:18:54	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:18:54	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:18:54	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:18:54	dhcp6c	14051	receive reply from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:18:54	dhcp6c	14051	reset a timer on igb0, state=REQUEST, timeo=0, retrans=955
Mar 28 21:18:54	dhcp6c	14051	send request to ff02::1:2%igb0
Mar 28 21:18:54	dhcp6c	14051	set IA_PD
Mar 28 21:18:54	dhcp6c	14051	set IA_PD prefix
Mar 28 21:18:54	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:54	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:54	dhcp6c	14051	set identity association
Mar 28 21:18:54	dhcp6c	14051	set status code
Mar 28 21:18:54	dhcp6c	14051	set server ID (len 26)
Mar 28 21:18:54	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:54	dhcp6c	14051	a new XID (277b97) is generated
Mar 28 21:18:54	dhcp6c	14051	Sending Request
Mar 28 21:18:54	dhcp6c	14051	picked a server (ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00)
Mar 28 21:18:53	dhcp6c	14051	reset timer for igb0 to 0.871864
Mar 28 21:18:53	dhcp6c	14051	server ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00, pref=-1
Mar 28 21:18:53	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:18:53	dhcp6c	14051	IA_PD prefix: 2a06:61c1:ba35::/48 pltime=86400 vltime=39466454569344
Mar 28 21:18:53	dhcp6c	14051	get DHCP option IA_PD prefix, len 25
Mar 28 21:18:53	dhcp6c	14051	IA_PD: ID=0, T1=43200, T2=69120
Mar 28 21:18:53	dhcp6c	14051	get DHCP option IA_PD, len 41
Mar 28 21:18:53	dhcp6c	14051	status code: no addresses
Mar 28 21:18:53	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:18:53	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:18:53	dhcp6c	14051	get DHCP option identity association, len 59
Mar 28 21:18:53	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:18:53	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:18:53	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:18:53	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:18:53	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:18:53	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:18:53	dhcp6c	14051	receive advertise from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:18:53	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=1, retrans=2075
Mar 28 21:18:53	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:18:53	dhcp6c	14051	set IA_PD
Mar 28 21:18:53	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:53	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:53	dhcp6c	14051	set identity association
Mar 28 21:18:53	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:53	dhcp6c	14051	Sending Solicit
Mar 28 21:18:52	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=0, retrans=1025
Mar 28 21:18:52	dhcp6c	14051	send solicit to ff02::1:2%igb0
Mar 28 21:18:52	dhcp6c	14051	set IA_PD
Mar 28 21:18:52	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:52	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:52	dhcp6c	14051	set identity association
Mar 28 21:18:52	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:52	dhcp6c	14051	a new XID (91e251) is generated
Mar 28 21:18:52	dhcp6c	14051	Sending Solicit
Mar 28 21:18:52	dhcp6c	14051	reset a timer on igb0, state=INIT, timeo=0, retrans=118
Mar 28 21:18:52	dhcp6c	14051	removing an event on igb0, state=SOLICIT
Mar 28 21:18:52	dhcp6c	14051	restarting
Mar 28 21:18:51	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=1, retrans=2083
Mar 28 21:18:51	dhcp6c	14051	transmit failed: Network is down
Mar 28 21:18:51	dhcp6c	14051	set IA_PD
Mar 28 21:18:51	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:51	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:51	dhcp6c	14051	set identity association
Mar 28 21:18:51	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:51	dhcp6c	14051	Sending Solicit
Mar 28 21:18:50	dhcp6c	14051	reset a timer on igb0, state=SOLICIT, timeo=0, retrans=1091
Mar 28 21:18:50	dhcp6c	14051	transmit failed: Network is down
Mar 28 21:18:50	dhcp6c	14051	set IA_PD
Mar 28 21:18:50	dhcp6c	14051	set option request (len 4)
Mar 28 21:18:50	dhcp6c	14051	set elapsed time (len 2)
Mar 28 21:18:50	dhcp6c	14051	set identity association
Mar 28 21:18:50	dhcp6c	14051	set client ID (len 14)
Mar 28 21:18:50	dhcp6c	14051	a new XID (7ed935) is generated
Mar 28 21:18:50	dhcp6c	14051	Sending Solicit
Mar 28 21:18:49	dhcp6c	14051	reset a timer on igb0, state=INIT, timeo=0, retrans=891
Mar 28 21:18:49	dhcp6c	12104	called
Mar 28 21:18:49	dhcp6c	12104	called
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[16] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-len] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[48] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-id] (6)
Mar 28 21:18:49	dhcp6c	12104	<3>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<5>[igb1.20] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>[prefix-interface] (16)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[16] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-len] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[32] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-id] (6)
Mar 28 21:18:49	dhcp6c	12104	<3>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<5>[igb1.30] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>[prefix-interface] (16)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[16] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-len] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[16] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[sla-id] (6)
Mar 28 21:18:49	dhcp6c	12104	<3>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<5>[igb1] (4)
Mar 28 21:18:49	dhcp6c	12104	<3>[prefix-interface] (16)
Mar 28 21:18:49	dhcp6c	12104	<13>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<13>[0] (1)
Mar 28 21:18:49	dhcp6c	12104	<13>[pd] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[id-assoc] (8)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<13>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<13>[0] (1)
Mar 28 21:18:49	dhcp6c	12104	<13>[na] (2)
Mar 28 21:18:49	dhcp6c	12104	<3>[id-assoc] (8)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>end of closure [}] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>comment [# we'd like some nameservers please] (35)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>["/var/etc/dhcp6c_wan_script.sh"] (31)
Mar 28 21:18:49	dhcp6c	12104	<3>[script] (6)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[domain-name] (11)
Mar 28 21:18:49	dhcp6c	12104	<3>[request] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[domain-name-servers] (19)
Mar 28 21:18:49	dhcp6c	12104	<3>[request] (7)
Mar 28 21:18:49	dhcp6c	12104	<3>comment [# request prefix delegation] (27)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[0] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[ia-pd] (5)
Mar 28 21:18:49	dhcp6c	12104	<3>[send] (4)
Mar 28 21:18:49	dhcp6c	12104	<3>comment [# request stateful address] (26)
Mar 28 21:18:49	dhcp6c	12104	<3>end of sentence [;] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[0] (1)
Mar 28 21:18:49	dhcp6c	12104	<3>[ia-na] (5)
Mar 28 21:18:49	dhcp6c	12104	<3>[send] (4)
Mar 28 21:18:49	dhcp6c	12104	<3>begin of closure [{] (1)
Mar 28 21:18:49	dhcp6c	12104	<5>[igb0] (4)
Mar 28 21:18:49	dhcp6c	12104	<3>[interface] (9)
Mar 28 21:18:49	dhcp6c	12104	skip opening control port
Mar 28 21:18:49	dhcp6c	12104	failed initialize control message authentication
Mar 28 21:18:49	dhcp6c	12104	failed to open /usr/local/etc/dhcp6cctlkey: No such file or directory
Mar 28 21:18:49	dhcp6c	12104	extracted an existing DUID from /var/db/dhcp6c_duid: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74

Mar 28 21:24:56	php-fpm	42926	/rc.newwanipv6: rc.newwanipv6: No IPv6 address found for interface WAN [wan].
Mar 28 21:24:56	php-fpm	42926	/rc.newwanipv6: rc.newwanipv6: Info: starting on igb0.

Mar 28 21:25:15	dhcp6c	14051	got an expected reply, sleeping.
Mar 28 21:25:15	dhcp6c	14051	removing server (ID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00)
Mar 28 21:25:15	dhcp6c	14051	removing an event on igb0, state=REQUEST
Mar 28 21:25:15	dhcp6c	14051	script "/var/etc/dhcp6c_wan_script.sh" terminated
Mar 28 21:25:15	dhcp6c	45988	dhcp6c RELEASE, REQUEST or EXIT on igb0 running rc.newwanipv6
Mar 28 21:25:15	dhcp6c	14051	executes /var/etc/dhcp6c_wan_script.sh
Mar 28 21:25:15	dhcp6c	14051	reset a timer on igb0, state=INIT, timeo=0, retrans=726
Mar 28 21:25:15	dhcp6c	14051	remove an IA: NA-0
Mar 28 21:25:15	dhcp6c	14051	IA NA-0 is invalidated
Mar 28 21:25:15	dhcp6c	14051	failed to update an address ::
Mar 28 21:25:15	dhcp6c	14051	failed to remove an address on igb0: Can't assign requested address
Mar 28 21:25:15	dhcp6c	14051	remove an address ::
Mar 28 21:25:15	dhcp6c	14051	create an address :: pltime=0, vltime=34359738368
Mar 28 21:25:15	dhcp6c	14051	make an IA: NA-0
Mar 28 21:25:15	dhcp6c	14051	nameserver[1] 2a02:fb8:3:300::3
Mar 28 21:25:15	dhcp6c	14051	nameserver[0] 2a02:fb8:2:200::3
Mar 28 21:25:15	dhcp6c	14051	dhcp6c Received REQUEST
Mar 28 21:25:15	dhcp6c	14051	get DHCP option DNS, len 32
Mar 28 21:25:15	dhcp6c	14051	status code: no addresses
Mar 28 21:25:15	dhcp6c	14051	get DHCP option status code, len 43
Mar 28 21:25:15	dhcp6c	14051	IA_NA address: :: pltime=0 vltime=0
Mar 28 21:25:15	dhcp6c	14051	get DHCP option IA address, len 71
Mar 28 21:25:15	dhcp6c	14051	IA_NA: ID=0, T1=0, T2=0
Mar 28 21:25:15	dhcp6c	14051	get DHCP option identity association, len 87
Mar 28 21:25:15	dhcp6c	14051	unknown or unexpected DHCP6 option opt_20, len 0
Mar 28 21:25:15	dhcp6c	14051	get DHCP option opt_20, len 0
Mar 28 21:25:15	dhcp6c	14051	DUID: 00:02:00:00:05:83:34:63:3a:36:64:3a:35:38:3a:38:37:3a:31:37:3a:66:38:00:00:00
Mar 28 21:25:15	dhcp6c	14051	get DHCP option server ID, len 26
Mar 28 21:25:15	dhcp6c	14051	DUID: 00:01:00:01:2f:75:c3:80:64:62:66:21:6b:74
Mar 28 21:25:15	dhcp6c	14051	get DHCP option client ID, len 14
Mar 28 21:25:15	dhcp6c	14051	receive reply from fe80::4e6d:58ff:fe87:1017%igb0 on igb0
Mar 28 21:25:15	dhcp6c	14051	reset a timer on igb0, state=REQUEST, timeo=0, retrans=959
Mar 28 21:25:15	dhcp6c	14051	send request to ff02::1:2%igb0
Mar 28 21:25:15	dhcp6c	14051	set option request (len 4)

ahxcjay

I took a tcpdump of the window (after 5 minutes) where v6 connectivity breaks. Is this potentially a result of a Liveness Check at the head end that is disconnecting me as Sense is failing to send advertisements back in response to the solicits of the head end? My ISP is IPoE not PPoE if that is of relevance.

I dumped both WAN and LAN when v6 connectivity breaks. ISP says they're not receiving neighbour advertisements back from their solicits, that's what is causing the breakage.

WAN dump: https://pastebin.com/PyEsinPC
LAN dump: https://pastebin.com/D5H3905g

bmeeks

Your problem may be related to this FreeBSD bug: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280701.

That bug report is lengthy as there is a lot of "discussion" in the thread. I'm not sure that everything discussed in the thread is fully fixed yet in all the FreeBSD branches. I am pretty sure the OPNsense guys did some custom patching of their own to partially address this. At one time there was a long-running thread on their forum site about the issue. I think this became a problem there first probably because IPv6 is more widely deployed and used in European countries where OPNsense is based. IPv6 is not as widely deployed in the U.S. where pfSense is based.

Here are a couple of links to Github referencing the custom patches on the OPNsense side:

https://github.com/opnsense/src/issues/242
https://github.com/opnsense/src/commit/2640600509de99cf6d75d588a6c27461d15809e6

The changes required are in the guts of FreeBSD (inside the pf code), and thus cannot be fixed without releasing an updated FreeBSD kernel. I am not sure if all of the required fixes are in pfSense Plus now as that source is proprietary. I do see some icmpv6 fixes in the FreeBSD kernel source used for pfSense CE (specifically in the tree for the not-yet-available 2.8 DEVEL snapshot):

https://github.com/pfsense/FreeBSD-src/commit/5ab1e5f7e5585558a73b723f07528977a82cee82

ahxcjay

@bmeeks Many thanks. Yes, I remember this original issue. I'll raise a Redmine later this week to see if I can start some formal investigation on this. I know of multiple pfSense users impacted by this here.