RE: netmon and /etc/hosts ?

2000-06-15 08:01:11
Subject: RE: netmon and /etc/hosts ?
From: REIBENSCHUH Alfred <alfred.reibenschuh AT it-austria DOT com>
To: nv-l AT lists.tivoli DOT com
Date: Thu, 15 Jun 2000 14:01:11 +0200
ok, i have to correct the information about our setup:

we have a caching-only bind running on the loopback interface
which uses round-robbing to query our 3 company dns
and the /etc/netsvc.conf specifies local,bind as resolv order

mfG. Alfred Reibenschuh
A-1020 Wien, Lassallestrasse 5
T: ++43-1-21717-58947
F: ++43-1-21717-58979
E: alfred.reibenschuh AT it-austria DOT com

-----Original Message-----
From: lclark AT US.IBM DOT COM [mailto:lclark AT US.IBM DOT COM]
Sent: Thursday, June 15, 2000 3:15 AM
To: NV-L AT tkg DOT com
Subject: Re: [NV-L] netmon and /etc/hosts ?

The conventional wisdom is that when the hosts file gets too big,
you ought to use a DNS, and to keep that responsive, you ought to
put a secondary nameserver right on the Netview server. If the large
hosts file contains names you don't need, you could of course prune it.
I know some customers shove a corporate hosts file around to all
systems nightly. Of course with a box that big, it's probably just the
names you need!


Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking

---------------------- Forwarded by Leslie Clark/Southfield/IBM on
06/14/2000 09:07 PM ---------------------------

Ray Schafer <schafer AT tkg DOT com>@tkg.com on 06/14/2000 02:01:50 PM

Please respond to IBM NetView Discussion <nv-l AT tkg DOT com>

Sent by:  owner-nv-l AT tkg DOT com

To:   IBM NetView Discussion <nv-l AT tkg DOT com>

Subject:  Re: [NV-L] netmon and /etc/hosts ?

REIBENSCHUH Alfred wrote:

> Hi !
> the machine      : ibm-rs6000 s7a 4-way 8gb memory 9gb swap 72gb disks
> the system       : aix 4.3.2
> the program      : tivoli/netview 6.0a
> the configuration: no DNS, a well established /etc/hosts (6000 lines
> on a " ovstart netmon ; netmon -M 53 " it takes hours
> to get something other into the trace-file than
> "event suppression installed"

This is something to check out before you attempt to attack the problem by
changing /etc/hosts:

Be sure that you do not have an /etc/resolv.conf file.  If you have one,
especially if you have an entry to a nameserver in there, this could
for the delay: it will cause the systems resolver routines to query the
nameserver before it looks in /etc/hosts.  It has to wait for an answer
the nameserver first.  AIX resolver routines will, (unless you tell it
otherwise through /etc/netsvc.conf or the NSORDER environmental variable)
use  DNS first IFF /etc/resolv.conf exists.

Ray Schafer                   | schafer AT tkg DOT com
The Kernel Group              | Distributed Systems Management

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