Re: is down?

Ron Daniel Jr. (
Wed, 12 Apr 1995 09:03:04 -0600

From: "Ron Daniel Jr." <>
Message-Id: <>
Date: Wed, 12 Apr 1995 09:03:04 -0600
In-Reply-To: Renato Iannella <>
To: Renato Iannella <>
Subject: Re: is down?

On Apr 12,  3:35pm, Renato Iannella wrote:

> If the URN denotes that is the
> name server, what can happen if the ns is down?
> Since the "uri" part of the hostname is not 
> specified in the URN, can we try ??

DNS allows more than one IP address to be associated with a single
FQDN. Typicaly proactice now is to do a gethostbyname(), look
at the first IP address, and fail if you can't talk with it. We
want client writers to be a little more tenacious in this. Keep
the list of addresses, try one. If it fails try another. Keep
doing that until you succeed or run out of IP addresses.

Ron Daniel Jr.                     email:    
Advanced Computing Lab             voice: (505) 665 0597
MS B287                              fax: (505) 665 4939
Los Alamos National Laboratory
Los Alamos, NM  87545          tautology:"Conformity is very popular"