Hello! I've stumbled upon a weird problem with IPv6 DHCP with DNSMasq. I have a /48 IPv6 prefix. For example let it be AAAA:AAAA:AAAA:: The interface on which DNSMasq receives the DHCP/RA queries is, for example, tap0 (it's for a VPN server) with an assigned address of AAAA:AAAA:AAAA::1/48. Now I wanted to create a dual DHCP/SLAAC configuration, but instead of making them both on the same prefix, I wanted to split them into subprefixes, i.e.: all static DHCPv6 queries would be assigned on AAAA:AAAA:AAAA:1:: all dynamic DHCPv6 queries would be assigned on AAAA:AAAA:AAAA:2:: all SLAAC configuration would be done on AAAA:AAAA:AAAA:FF00:: Each on it's own /64 prefix. I've tried to set it up, but it seems that each time I define it like this: dhcp-range=tap0, AAAA:AAAA:AAAA:FF00::,slaac,ra-stateless,ra-only,64 #for SLAAC dhcp-range=tap0, AAAA:AAAA:AAAA:2::,64,1h #for dynamic DHCPv6 I just don't get a lease at all... Which is probably logical. When I try to specify the actual prefix of 48 instead of 64, I get the error "prefix length must be at least 64" even for the dynamic DHCPv6 option. I've worked around that by assigning IPs to the tap0 interface of AAAA:AAAA:AAAA:FF00::/64 AAAA:AAAA:AAAA:1::/64 AAAA:AAAA:AAAA:2::/64 but it really feels like a hack than a real solution. Is there any cause why we can't set a prefix-len smaller than 64, to allow configuring different subprefixes differently?
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