[dns-operations] Advisory - L.ROOT-SERVERS.NET changing to 199.7.83.42 on 2007-11-01

[Kim Davies]

Colleagues,

This is advance notice that there is a scheduled change to the IP
address for one of the authorities listed for the DNS root zone. The
change is to L.ROOT-SERVERS.NET, which is administered by ICANN.

The new IPv4 address for this authority is:

    199.7.83.42

This change is anticipated to be implemented in the root zone on 1
November 2007, however the new address is operational now. It will
replace the previous IP address of 198.32.64.12.

We encourage operators of DNS infrastructure to update any references to
the old IP address, and replace it with the new address. In particular,
many DNS resolvers have a DNS root "hints" file. This should be updated
with the new IP address.

New hints files will be available at the following URLs once the change
has been formally executed:

    ftp://rs.internic.net/domain/db.cache
    ftp://rs.internic.net/domain/named.cache
    ftp://rs.internic.net/domain/named.root
    ftp://ftp.internic.net/domain/db.cache
    ftp://ftp.internic.net/domain/named.cache
    ftp://ftp.internic.net/domain/named.root

It is expected that the old address will continue to work for at least
six months after the transition, but will ultimately be retired from
service.

With kindest regards,

Kim Davies
Internet Assigned Numbers Authority