DNS IPv6



  • In 2.3 DNS when doing a host nslookup it does not return the IPv6 address, just the IPv4.

    Can an option be added in the DNS resolver to "Register DHCPv6 leases in the DNS Resolver" and "Register DHCPv6 static mappings in the DNS Resolver"?



  • First, only static DHCPv6 entries will have a hostname associated with them, assuming you provide it when you set up the static DHCPv6 entry. Unlike IPv4, hostnames are not provided with DHCPv6, so dynamic entries won't have a hostname.

    I know this works fine under 2.2.6… but unfortunately I can't (yet; still waiting on DHCPv6 support for Track Interface!) test this on 2.3. I have a static DHCPv6 entry with the same hostname as DHCP, and when I do a nslookup I receive both IP addresses.



  • OK got IPv6 lookup after static assignment.

    Found a couple of issues with static DHCPv6 assignment process.

    1. Since I didn't have an easy way to find the DUID for the host I need IPV6 on, I picked up the one assigned thru DHCPv6. I picked the host from the DHCPv6 leases status and click on + add static mapping on the right. It picked up the DUID from it and I assigned my desired info. The moment I hit save, it creates the static mapping but then disables the DHCPv6 Server/RA on that interface. I have to click enable and re-assign the range. And yes, the static mapping was outside of the DHCPv6 range beforehand.

    2. The DHCPv6 static mapping list in the Server/RA page is not sorted based on the IPv6 assignment but sorted on the last added static host. So whichever is the last added host, it's on top of the list.



  • @Asterix:

    OK got IPv6 lookup after static assignment.

    Found a couple of issues with static DHCPv6 assignment process.

    1. Since I didn't have an easy way to find the DUID for the host I need IPV6 on, I picked up the one assigned thru DHCPv6. I picked the host from the DHCPv6 leases status and click on + add static mapping on the right. It picked up the DUID from it and I assigned my desired info. The moment I hit save, it creates the static mapping but then disables the DHCPv6 Server/RA on that interface. I have to click enable and re-assign the range. And yes, the static mapping was outside of the DHCPv6 range beforehand.

    2. The DHCPv6 static mapping list in the Server/RA page is not sorted based on the IPv6 assignment but sorted on the last added static host. So whichever is the last added host, it's on top of the list.

    Can anyone confirm this DHCPv6 behaviour?


Log in to reply