RE: [NV-L] Fine Tunning Polling Intervals!

["Evans, Bill" <Bill.Evans@hq.doe.gov>]

Allow me to steal Francois' thunder on this one since it's a weekend. 

 

In my shop I use Ping polling for devices which have only one interface and SNMP for routers and such which have more than one.  Ping polling is simpler because the SNMP poll is a query for the number of interfaces present and a query for the ADMIN and OPER status of the interface.  This gives a more fine grained status than the Ping can. 

 

The result of Ping polling is either UP (green) or DOWN (red).  The result of SNMP polling may be UP, DOWN or ADMIN DOWN (pink).  Not a great difference but sometimes useful. 

 

The big difference is in a secure environment where all but the primary interface on a router is blocked from responding to Ping.  (I.e. Firewalls in our shop.)  For Ping polling of multi-interface devices you also must have every interface defined in the DNS or Hosts file resolving back to the primary name.  Those interfaces are also blocked from SNMP as well. 

 

As far as timing, either means of polling uses the same configuration setting. 

 

Francois did not identify what system he is using as the NetView host.  Windows systems default to a 20 minute polling interval and Unix/Linux systems default to five minutes.   This reflects the capabilities of the underlying operating system.   That said, Windows on a powerful system can easily handle a five minute cycle if the universe of supported devices isn't too large. 1200 nodes would not be considered a heavy load.   Read the hardware and software prerequisites for both versions of NetView to get a good feel for the capabilities but keep in mind the documents were written some time ago and todays medium size systems would have been brutes back then. 

 

Bill Evans 

 

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From: nv-l-bounces@lists.ca.ibm.com [mailto:nv-l-bounces@lists.ca.ibm.com] On Behalf Of Usman Taokeer
Sent: Saturday, October 21, 2006 5:26 PM
To: Tivoli NetView Discussions
Subject: Re: [NV-L] Fine Tunning Polling Intervals!

Francois,

 

Just elaborate on your response, does it matter if the Poll is SNMP or ICMP? Considering we have plenty of resources avaialble on the Server.

 

Regards,

 

Usman Taokeer

 

On 10/17/06, Francois Le Hir <flehir@ca.ibm.com> wrote:

It all depend on the resources of your server, but netview is able to poll
thousands of nodes every 5mn and even at a shorter interval. The way it
does it is that it doesn't wait for an answer before sending pings to other
objects. My server poll over 6000 interfaces every 2mn so if your server
has the resources, I would not worry about netmon not being multi-threaded.

Salutations, / Regards,

Francois Le Hir
Network Projects & Consulting Services
IBM Global Technology Services




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            10/17/2006 11:05          [NV-L] Fine Tunning Polling
            AM                        Intervals!


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Hi list,

NV 7.1.4 FP04
Windows 2003 Std SP1

We have around 1200 nodes, consisting of Routers, Servers and ATMs, or to
elaborate 400 locations, and each location has  one (1) Router, One Server
and One ATM respectively.

We want to configure/tune netview in a such a way that if any one of the
node for e.g the "Server" goes down it(netview) should be able to alert
within five(5) minutes. Now as per my understanding configuring netview to
poll 1200 nodes every 5 minutes is not the answer, there is a high
possibility that it could ever poll all 1200 nodes in one go. I also read
that "netmon" is not multi-threaded so it makes it even kinda of worst.

So what would you suggest we configure or tune netview so that it should be
able to alert the operations staff within 5 minutes if any
(Server,Router,ATM) goes down. What have been your experiences or how did u
handle these kind of situations in your experiences? or just a head start
for me where shall i look into.

Thanks in advance!


Regards,

Usman Taokeer
Si3._______________________________________________
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