2011-08-23 - News - Chris Thompson
The IPv6 routing prefixes for the vlans on which the CUDN central nameservers are located are being altered. As a result, their IPv6 addresses are changing as follows:
Old IPv6 address New IPv6 address authdns0.csx 2001:630:200:8080::d:a0 2001:630:212:8::d:a0 authdns1.csx 2001:630:200:8120::d:a1 2001:630:212:12::d:a1 recdns0.csx 2001:630:200:8080::d:0 2001:630:212:8::d:0 recdns1.csx 2001:630:200:8120::d:1 2001:630:212:12::d:1
The new addresses are working now, and the old addresses will continue to work as well until Monday 5 September, when they will be removed. If you are using them (e.g. in nameserver or stub resolver configuration files) you should switch to the new addresses (or the IPv4 ones) before then.
The comments in the sample configuration file
https://jackdaw.cam.ac.uk/ipreg/nsconfig/sample.named.conf
about using IPv6 addresses to address the nameservers have been modified appropriately.