AW: [nv-l] automation of add,delete, change activities

["Mildeberger, Thorsten" <thorsten.mildeberger@eds.com>]

Hi Leslie,

thanks for your reply and the hint dealing with the S flag. 

 

Before a request is accepted and is forwarded to the Netview servers, a check is done via our internal request portal. 

Only if the check ensures that a new interface can be added for instance, the add activity is performed in the next step on the Netview server.

 

The S flag is something important that we might need, cause as long as an interface should stay linked to a device in Netview (i.e. as long as no delete request was set up), a config poll should not be able to remove this interface from the device at all.

 

best regards,

Thorsten Mildeberger

EMS Solutions - SMC Tools & Automation
ITO - Central Region
EDS Deutschland GmbH
Eisenstr. 43
65428 Rüsselsheim
Tel.: +49 (0) 6142 80-3706
Fax.: +49 (0) 6142 80-3030                                      
mailto:thorsten.mildeberger@eds.com

-----Ursprüngliche Nachricht-----
Von: owner-nv-l@lists.us.ibm.com [mailto:owner-nv-l@lists.us.ibm.com]Im Auftrag von Leslie Clark
Gesendet: Freitag, 1. Oktober 2004 13:55
An: nv-l@lists.us.ibm.com
Betreff: Re: [nv-l] automation of add,delete, change activities

Just a clarification: there is a difference between 
configuration polling and new node discovery polling. You can turn off new node 
discovery polling, and add nodes as directed by your change control process, and 
allow configuration polling to discovery new interfaces on existing devices. In 
some cases it will also remove interfaces that no longer exist in the interface 
tables of the device. That depends on whether there is an S flag in the 
oid_to_type file for that kind of device. 

Cordially,

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

Stephen Hochstetler/Austin/IBM@IBMUS
Sent by: owner-nv-l@lists.us.ibm.com

10/01/2004 07:15 AM

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Subject	Re: [nv-l] automation of add,delete, change activities

Thorsten,

I helped setup an environment that needed this function 
a number of years ago. I can talk about it in general terms.

1 -- doing a 
config poll is still VERY IMPORTANT. Don't let people tell you that you should 
not do this. If this is true, then you have lost much of the power of NetView. 
You will end up with many 'islands' of nodes in your view. It is better to 
discover all the interfaces on a device and unmanage the interfaces that you do 
not wish to monitor.

1 (part b) NetView generates a trap every time a new 
interfaces is discovered. You can log those to see if new interfaces should be 
managed. Some automation is possible with scripts too to see if the change is 
ok. If not ok, then have script unmanage the interface.

2 -- you need a 
'database' of nodes with IP addresses that you will be managing. This database 
needs to be able to generate a list of IP addresses and node names to 
discover/manage....as well as be able to generate a list of managed IP addresses 
(all interfaces). Then you can do the following:
a) take the list of IP 
addresses and node names and update your DNS (hopefully running on your NetView 
server)
b) the the list of IP addresses and node names and use 'loadhosts' to 
discover them. (via a script that does a demandpoll right away)
c) either 
manually or via a script verify the interfaces on those new nodes are just those 
you want to manage. Unmanage any interface you need to.
d) run another script 
that takes your NetView database and generates DNS zone files for the IP addr to 
name mapping. This gives EVERY IP address in your NetView a DNS name. But you 
want to leave your name to IP Adress lookup to remain one IP address. (should be 
the IP interface on node that you are doing management through).

3 - For 
the delete process, I still think it is best to have a person do this using the 
map. NetView will do its own cleanup after a period of time, but usually you 
want it done before that.

Stephen Hochstetler 
shochste@us.ibm.com
International Technical Support Organization at 
IBM
Office - 512-838-6198 (t/l 678) FAX - 512-838-6931
http://www.redbooks.ibm.com