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RE: [nv-l] ping timeout in NV

To: nv-l@lists.tivoli.com
Subject: RE: [nv-l] ping timeout in NV
From: "James Shanks" <jshanks@us.ibm.com>
Date: Tue, 19 Mar 2002 15:31:09 -0500
Well, netmon is not my area, but I just asked the netmon owner whether the 
process had changed in 7.1 and she says "No".
The values in ovtopodump don't come out of the sky.  They come from the 
xnmsnmpconf configuration.  Or at least they are supposed to.
It is netmon who put them in the topology database you are reading with 
ovtopodump.  And it should be netmon who changes them.

What is supposed to happen is this.  When you change values using 
xnmsnmpconf, an internal trap is generated which causes netmon to do what 
is called an SNMP fix up, where in he re-evaluates the settings for every 
node and interface in the topology database.  Of course, if you have a big 
database, this can take awhile, and if we are talking seconds, there may 
be a delay here.  But if you do a netmon trace then you should be able to 
see this fix up going on, though I am not about to try to tell anyone what 
options to use on that trace to make it really readable.  All I know is 
that with netmon -M 31 you get the full trace and you should be able to 
find the words "fix up" in it when this process occurs.    If not, then 
I'd call Support.

 And it should not be necessary to delete and rediscover a node just to 
force a change in the values either, though that would certainly do it. 
You should be able to accomplish the same thing by unmanaging and 
re-managing the node, since everything has to be reset for it at that 
point.    I would certainly try that first.


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





"Barr, Scott" <Scott_Barr@csgsystems.com>
03/19/2002 02:38 PM

 
        To:     nv-l@lists.tivoli.com
        cc: 
        Subject:        RE: [nv-l] ping timeout in NV

 

The time out values are used from OVTOPODUMP not from XNMSNMPCONF (just
tested this the other day as Paul can attest)

Delete and rediscover the object after you have updated XNMSNMPCONF and 
the
changes to the timeout/retries will be there.

-----Original Message-----
From: James Shanks [mailto:jshanks@us.ibm.com]
Sent: Tuesday, March 19, 2002 1:04 PM
To: nv-l@lists.tivoli.com
Subject: Re: [nv-l] ping timeout in NV


Am I sure?  Yes.  It has always been so and it is documented as such in 
the books we ship.

xnmsnmpconf controls how often netmon status polls, which is by ping, as 
well as how it does SNMP requests, for config checks. 
We are talking about netmon's pings are we not?  What did you change in 
xnmsnmpconf?

The only thing I can think of is that is it may take a ping cycle to get 
the values re-set.  If netmon already has a ping cycle for this object 
going, then that will have to expire first. 

How are you determining that it is not working?


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





Can Huynh <can_huynh@yahoo.com>
03/19/2002 01:28 PM

 
        To:     James Shanks/Raleigh/IBM@IBMUS
        cc:     nv-l@lists.tivoli.com
        Subject:        Re: [nv-l] ping timeout in NV

 

that's what I tried before sending the question. But
it did not have any effect. Are you sure the timeout
we specify in snmpconf is not just for snmp requests
and does not apply to the ping command?
Thanks
 
--- James Shanks <jshanks@us.ibm.com> a écrit : > This
is basic SNMP configuration.  As I recall you
> are on UNIX.  Use 
> xnmsnmpconf  from the command line.
> 
> James Shanks
> Level 3 Support  for Tivoli NetView for UNIX and NT
> Tivoli Software / IBM Software Group
> 
> 
> 
> 
> 
> 
> "can huynh" <can.huynh@sympatico.ca>
> 03/19/2002 04:07 PM
> 
> 
>         To:     <nv-l@lists.tivoli.com>
>         cc: 
>         Subject:        [nv-l] ping timeout in NV
> 
> 
> 
> Hello,
> I am wondering if there is a way to set the timout
> for the ping command 
> used by netmon to check the status of network
> equipments.
> 
> We have the following problem. 
> Our network is relatively slow these days and reply
> to ping can take 
> several seconds.
> 
> Netmon sometimes interpret that as an interface
> down. I just want to 
> increase ping timout to say 5 seconds to prevent
> that.
> 
> Is there a way?
> 
> 
> 
> 
>
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