Use nameserver name or IP?

Padraig Houlahan pjh at
Mon Jul 16 23:01:24 UTC 2007


Is there a generally accepted practice when it comes to
specifying nameservers? Specifically, in /etc/resolv.conf
files (for example) I normally use the IP form for the
nameserver. But, this makes it tricky to bring up or replace
the existing nameserver.

Another example might be in the name-server entry of DHCP
tables - use the IP or the FQDN?

Many sites seem to use names like and which has the advantage that you can move
your name services to a new host/IP and as long as the name
is the same, all clients can use it.

I guess there is a slight overhead in using the FQDN form,
but is that a price worth paying for the management



Padraig Houlahan
Director of I.T.
Lowell Observatory
Flagstaff, AZ 86001

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