Flint 3 - IPv6 IoT subnet configuration conflict

Router
1

Hello, I have a bug to report. I recently set up a Flint 3 (firmware 4.9.0).

I configured 2.4/5/6GHz networks + one IoT network. Then I noticed ipv6 was off by default so I turned it on. (not sure if order matters for reproducing)

I noticed clients on my LAN were not getting ipv6 addresses. The log had messages like:

odhcpd[21005]: A default route is present but there is no public prefix on lan thus we don't announce a default route by overriding ra_lifetime!

NAT6 did work, but I wanted native. Eventually I sshd in and figured out the issue.

ifstatus wan6 revealed:

"ipv6-prefix": [
         {
                 "address": "XXXX:XXXX:XXXX:X::",
                 "mask": 64,
                 "preferred": 79578,
                 "valid": 79578,
                 "class": "wan6",
                 "assigned": {
                         "iot": {
                                 "address": "XXXX:XXXX:XXXX:X::",
                                 "mask": 64
                         }
                 }
         }
 ],

This assignment did not go away even if I changed IPv6 mode to NAT. Disabling the IoT network in the webui then running ifdown wan6; ifup wan6 released the assignment. Then I was able to enable IPv6 native mode.

I'm not sure what the intended behavior of the IoT network is. I assumed it was supposed to be like the guest network and use NAT6. Maybe I need a /56 block to use the IOT network?
Hopefully this helps other users who are confused. The webui wasn't very helpful.

3

Hi

Thank you for your report.

We were able to reproduce the issue locally, and we will ask the development team to investigate it further.

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