I just upgrade my AP router from 24.10.4 to 25.10.5, the main router is still at 24.10.4
I use a DHCPv6 client protocol to assgin IPV6 for the AP, so that other services running on this AP can be accessed by V6., like adguardhome, etc.
It used to work quite well in 24.10.4 for more than half year. After updraded to 24.10.5, I observe several time the IPV6 dhcp does not complete in 20 minutes, I have to restart the lan6 interface and hope it work. this is really not expected.
I found some network unreachable complaints in syslog, but have no idea why it happens sometime, and it does well in the other time. I would like to have your advice on how to fix this issue. Thank you very much in advance.
syslog of AP router:
[2026/7/3 GMT+8 15:52:05] daemon.notice: netifd: Interface 'lan6' is enabled
[2026/7/3 GMT+8 15:52:05] daemon.notice: netifd: Interface 'lan6' is setting up now
[2026/7/3 GMT+8 15:52:05] daemon.notice: netifd: Interface 'lan6' is now down
[2026/7/3 GMT+8 15:52:05] daemon.notice: netifd: Interface 'lan6' is setting up now
[2026/7/3 GMT+8 15:52:05] daemon.notice: netifd: lan6 (2341): Failed to send RS (Network unreachable)
[2026/7/3 GMT+8 15:52:07] daemon.notice: netifd: lan6 (2341): Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
[2026/7/3 GMT+8 15:52:07] daemon.notice: netifd: lan6 (2341): Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
[2026/7/3 GMT+8 15:52:07] daemon.notice: netifd: Interface 'lan6' has link connectivity
[2026/7/3 GMT+8 15:52:07] daemon.notice: netifd: lan6 (2341): Failed to send RS (Address not available)
[2026/7/3 GMT+8 15:52:08] daemon.notice: netifd: lan6 (2341): Failed to send SOLICIT message to ff02::1:2 (Address not available)
[2026/7/3 GMT+8 16:17:03] daemon.notice: netifd: Interface 'lan6' is now down
[2026/7/3 GMT+8 16:17:03] daemon.notice: netifd: Interface 'lan6' is disabled
[2026/7/3 GMT+8 16:17:13] daemon.notice: netifd: Interface 'lan6' is enabled
[2026/7/3 GMT+8 16:17:13] daemon.notice: netifd: Interface 'lan6' is setting up now
[2026/7/3 GMT+8 16:17:25] daemon.notice: netifd: Interface 'lan6' is now up
The config on the AP router
config bridge-vlan
option device 'br-lan'
option vlan '10'
list ports 'eth1:u*'
list ports 'lan1:u*'
list ports 'lan2:u*'
config interface 'lan'
option device 'br-lan.10'
option proto 'static'
option ipaddr '192.168.2.2'
option netmask '255.255.255.0'
option gateway '192.168.2.1'
list dns '192.168.2.1'
option delegate '0'
config interface 'lan6'
option proto 'dhcpv6'
option device '@lan'
option reqaddress 'force'
option reqprefix 'no'
option norelease '1'
option sourcefilter '0'
option delegate '0'
option ip6ifaceid '::2'
option force_link '1'
option multipath 'off'
Config on the main router
config interface 'wan6'
option proto 'dhcpv6'
option device '@wan'
option reqaddress 'try'
option reqprefix 'auto'
option norelease '1'
option sourcefilter '0'
option metric '20'
config bridge-vlan
option device 'br-lan'
option vlan '10'
list ports 'lan1:u*'
list ports 'lan5:u*'
config interface 'lan'
option device 'br-lan.10'
option proto 'static'
option ipaddr '192.168.2.1'
option netmask '255.255.255.0'
option defaultroute '0'
option ip6assign '64'
option ip6hint '2'
config dhcp 'lan'
option interface 'lan'
option start '20'
option limit '130'
option leasetime '12h'
option dhcpv4 'server'
option dhcpv6 'server'
option ra 'server'
list ra_flags 'managed-config'
list ra_flags 'other-config'
option preferred_lifetime '5m'
list dns 'fd88:0:0:2::2'
list dns 'fd88:0:0:2::1'
list dhcp_option '6,192.168.2.2,192.168.2.1'