RE: Help! Network no longer recognizes AS/400 hostname

Think of DNS like you think of a phone directory.  You need the IP address
(telephone number) to communicate with the remote host (your friend).  If
his address changes (he gets a new phone line) and you don't know what it
changed to, you'll have to look him up (by name) in the phone directory.
DNS does not care whether you are listed or not.  Its just there to assist
you in locating the host address by name.

Your local network addresses must be entered manually into your network's
DNS server. Just as your business may not publish all of it's telephone
numbers in the public white/yellow pages, these numbers must be available to
employees within the company.  The company publishes a private directory
which is available to employees only.

Eric DeLong
Sally Beauty Company
MIS-Sr. Programmer/Analyst
940-898-7863 or ext. 1863



-----Original Message-----
From: Rick Rauterkus [mailto:ricker@simmonsjp.com]
Sent: Thursday, March 14, 2002 9:31 AM
To: midrange-l@midrange.com
Subject: RE: Help! Network no longer recognizes AS/400 hostname


Ok, I'm learning much more about networking than I wanted to, but
unfortunately it is necessary.  If you don't mind, couple of more questions
before I sit down with the networking person:

First off, we are running DNS on a W2K server.

Second, just so I understand this correctly, having the address of the DNS
server on a particular computer allows that computer to resolve names, but
does not help other computers to resolve a name to this computer?  That is
the function of the DNS.

Next, how does the DNS server know all the names on the network?  Is there
an equivalent to the HOSTS file that should contain all the names?  Is this
maintained manually or by some automatic means?

Also, in going around trying the resolve the problems, I noticed that he had
setup most of the machines with the AS/400's IP address instead of the name,
which explains why some were having problems and others weren't.  Is there
an advantage one way or another?

Many thanks again for all your help!
Rick


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