One of the first aspects of the IPv6 deployment to be tackled was addressing both in terms of the allocation plan and the mechanism used. While an allocation plan had been in place for some years, the opportunity to refine this was taken and the format was changed to reflect a more logical allocation method over a physical plan based on buildings or departments to simplify management. A summary of the new plan is presented below.

Basic Configuration

Prefix allocated by JANET: 2001:0630:0080::/48
Special Addresses: 2001:630:80:0000::/64 - Reserved (DNS, services, etc.)
2001:630:80::1 Router
2001:630:80::4 DNS - primary
2001:630:80::7 DNS - secondary

General Address Format

Other than the above special addresses, Lancaster University IPv6 addresses observe the following format:

<48 UNI> <3 Res> <1 Site> <12 Subnet> <64 Host>

where:

<48 UNI> - 48 bit University prefix 2001:630:80::/48
<3 Res> - 3 bits reserved for future aggregation
<1 Site> - 1 bit identifying the site of the network (provisional)
<12 Subnet> - 12 bits for site subnet
<64 Host> - 64 bit host identifier