IPv6 Dynamic Prefix Problems

sthaug at nethelp.no sthaug at nethelp.no
Wed Dec 16 11:13:43 CET 2015

> > 1) Many DNS changes for services behind the dyn prefix (not all devices
> > are able to update DNS records)
> > 2) Security policies with DynDNS ranges (how to allow a dyn IPv6-range
> > in other firewall policies?)
> > 3) Routing inside IPv6 VPN tunnels (solved with OSPFv3, but maybe not
> > optimal?)
> 4) Prefix Translation
> 5) Use a SIXXS / HE Tunnel 
> 6) Paying extra for static prefixes (if even possible) 
> There are several theories about why they change the prefix:
> a) customer demand (privacy)
> b) we have always done it this way
> c) as with v4 we can sell static addresses

We run dynamic IPv4 allocation for our residential customers (and any
business customer which wants it) - and we *don't* actively change the
allocated address. As long as the customer sends a DHCP request from the
same MAC address (or client identifier), the customer would normally get
the same IPv4 address.

We expect to use the same policy for IPv6 - i.e. there are no plans to
*actively* change IPv6 address / prefix.

Steinar Haug, AS 2116

More information about the ipv6-ops mailing list