IPV6 setup problem

[A Former User]

I try to setup ipv6 dhcp server and i get this error The following input errors were detected:
Prefix Delegation From address is not a valid IPv6 Netmask for 2001:470:b:116::/64
Prefix Delegation To address is not a valid IPv6 Netmask for 2001:470:b:116::/64

[hda]

For DHCP serving you just use the Range inputfields. No Delegation of LAN-blocks to another of your routers. ;)

[junicast]

@cdx304:

I try to setup ipv6 dhcp server […]

Are you absolutely sure you want to use DHCPv6?
May I ask for what purpose / what kind of clients?

[A Former User]

I used dhcp ipv6 server before and worked fine but i am having trouble with getting everything working again after ssd failure and i am  running out of patients .

[severach]

Ok Doc. Your first patient is:

Subnet: 128 bits

Give it some 64 bit medicine and let's see if that unstops the DHCP server.

In non medical terms, you forgot to set the subnet mask on your LAN address. pfSense chose 128 for you. You need 64.

I like DHCPv6 only, no SLAAC. Firewalls just aren't ready yet for all the problems SLAAC is going to cause.