Re: [nv-l] Node IP Adddress change

[James Shanks <jshanks@us.ibm.com>]

While you can change hostnames and have
netmon figure that out automatically if the IP address is the same, I don't
think the reverse is true.

Someone else can correct me if I am
wrong, but I think that what you will wind up with is two distinct networks,
one red (the old one) and one green (the new one).  The reason is
that all of netmon's polling is done by IP address, which it retrieves
from the current database.   When that IP address doesn't respond,
it will go red (critical). After 7 days, if you haven't altered the node
delete interval, it will be deleted.  Or you can manually delete them
before then if you prefer.

Meanwhile new, node discovery will be
proceeding at the same time, assuming you have that turned on.  If
NetView's own IP address changes, then you must run /usr/OV/service/reset_ci
afterwards to fix that.  Then new node discovery will proceed as it
always does with the seed file and the local ARP cache.  If you are
using a seed file and you have hostnames in there, then they will be checked
against the existing database, and since they will already be there, nothing
will happen except polling, which will turn them red.  If you have
new IP addresses in there, then they will be discovered and new objects
created with whatever hostnames are returned by your name resolution system
(DNS, /etc/hosts). 

You can determine whether I am correct
or not by running a test yourself with some existing box now, if you like.
 It doesn't have to have one of your new range IP address.  Just
give it a new IP address, but don't change the hostname, and override DNS
(or change it too if you like) with /etc/hosts.   Put the hostname
in the seed file and restart netmon and see what happens. 

 The question of how best to handle
the global change can only be answered by someone who understands your
network, your NetView customizations, and your timetable for the change.
 If everything is going to happen quickly, say overnight or in a day
or two, then you might just want to clear the databases and start afresh
once DNS is fixed.  If you have location containers defined in location.conf,
they will have to be changed or new ones created.   If the timetable
is longer, so that you will have to monitor both old and new networks,
then you'll be making changes in NetView slowly.  

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group

Meyos Yemveng <yemveng@yahoo.ca>
Sent by: owner-nv-l@lists.us.ibm.com

09/27/2004 11:53 AM

Please respond to
nv-l

To	netview Tivoli <nv-l@lists.us.ibm.com>
cc
Subject	[nv-l] Node IP Adddress change

Hi folks,
NV7.1.3 SP2, SOLARIS
 
The Network team is migrating to a new IP class, that
means all managed node IP addreses are going to be change, but their hostnames
will remain the same.
 
Q1: ANy ideas on how I can best handle this?
Q2: Does Netview changes the IP address of a managed Node
automatically if the hostname remains the same?


Thank You,
Meyos 
"ALLEZ LES LIONS INDOMPTABLES"

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