OPNsense Forum

Archive => 20.1 Legacy Series => Topic started by: TiltedFish on May 27, 2020, 05:49:42 am

Title: DHCPv6 doesnt work on vlans
Post by: TiltedFish on May 27, 2020, 05:49:42 am

I have enabled DHCPv6 on a vlan.

Devices are requesting dhcpv6 addresses, but opnsense refuses to respond (checked with packet capture)

ISP gives me a /56
Assigned a /64 statically to the vlan interface
Enabled dhcpv6

ANy ideas?

Title: Re: DHCPv6 doesnt work on vlans
Post by: marjohn56 on May 27, 2020, 07:54:30 am

Apart from it does work, I have 3 VLANs on my primary router, all handing out v6 fine.


Need more info than 'doesn't work'. is the WAN static v6 or dhcp6, If the latter then I assume using manual override  on the VLANs. What's the state of the Router Advertisements, managed or assisted?

Title: Re: DHCPv6 doesnt work on vlans
Post by: TiltedFish on May 27, 2020, 10:06:50 am

The WAN is dhcpv6 (but isp wont change it).

When set to track interface + slaac all works fine, but when i set the interfaces statically, dhcpv6 wont hand out leases to anyone.

Title: Re: DHCPv6 doesnt work on vlans
Post by: marjohn56 on May 27, 2020, 10:09:09 am

OK, and what's the RADV setting, managed or assisted?

Title: Re: DHCPv6 doesnt work on vlans
Post by: TiltedFish on May 27, 2020, 11:10:33 am

Managed.

Heres what else i've tried -

Lan set to track interface
radvd set to managed
dhcpv6 enabled, range 2407:7000:84ac:ed02:: to 2407:7000:84ac:ed02:ffff:ffff:ffff:ffff
prefix delegation size - 60

Title: Re: DHCPv6 doesnt work on vlans
Post by: marjohn56 on May 27, 2020, 11:27:44 am

OK, I suspect that you are entering the full addresses into the dhcp6d settings, if so that's why it's not working. Should look like this:


(https://i.ibb.co/Hq3Pbyf/dhcpdv6.png) (https://ibb.co/tDF2v6T)