NS records

[Barry Margolin]

In article <00051117174002.16940 at cypci319>,
Stephen Carville  <carville at ugsolutions.com> wrote:
>I just want to make sure that I am reading DNS and Bind correctly.
>
>I am adding two new nameservers called -- not too originally -- ns0 and
>ns1.  These will, eventually be the registered nameservers for the
>ugsolutions.com domain.  Both are slaves rights now tho one will probably
>become a master server someday.  As near as I can tell, these nameserver =
>have
>to have an NS record in the foward zone file and I can add other servers =
>there
>even if they are not registered. Am I reading the instructions correctly?=

You're correct.

>Is there any advantage to listing more than the two registered servers?

A caching server that hasn't recently cached the NS records from one of the
authoritative servers will only try to query the registered servers.  If
you have 4 servers but only register 2 of them, and those 2 are both down,
that caching server won't know about the other 2, so it won't be able to
look up anything in your domain.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Burlington, MA
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