cmsj
Casual Member
So, having posted in the other thread that my ipv6 was brought back to life after talking to CF tech support, things have taken a turn for the worse in a way that I am struggling to understand.
I noticed that after a few hours, the logs on my Unifi UDM SE were showing odhcp6c sending RENEW messages to the DHCPv6 server, but not seeming to get a response.
Last night, the UDM rebooted for a firmware upgrade and now odhcp6c isn't getting replies to even its SOLICIT packets. tcpdump shows them going out, but nothing coming back in. Neighbor/Router solications/advertisements seem to be working fine, and I see a CF router appear in "ip -6 neighbor" as REACHABLE.
In a fit of desperation I've installed both dhcpcd and dibbler-client on the UDM to see if I could get any further with those and they both seem to trigger DHCPv6 ADVERTISE responses to their SOLICITs, but at least in the case of dibbler, it didn't seem to be aware that it was getting the responses.
Unifi gives almost zero options for configuring how odhcp6c is configured (literally just the prefix size), but if anyone has any deeper insights into what the heck might be going on here, I would love to hear them. Happy to share packet dumps, etc. if that would help.
I noticed that after a few hours, the logs on my Unifi UDM SE were showing odhcp6c sending RENEW messages to the DHCPv6 server, but not seeming to get a response.
Last night, the UDM rebooted for a firmware upgrade and now odhcp6c isn't getting replies to even its SOLICIT packets. tcpdump shows them going out, but nothing coming back in. Neighbor/Router solications/advertisements seem to be working fine, and I see a CF router appear in "ip -6 neighbor" as REACHABLE.
In a fit of desperation I've installed both dhcpcd and dibbler-client on the UDM to see if I could get any further with those and they both seem to trigger DHCPv6 ADVERTISE responses to their SOLICITs, but at least in the case of dibbler, it didn't seem to be aware that it was getting the responses.
Unifi gives almost zero options for configuring how odhcp6c is configured (literally just the prefix size), but if anyone has any deeper insights into what the heck might be going on here, I would love to hear them. Happy to share packet dumps, etc. if that would help.























