When netmon polls for status, it uses either
'ping' or 'SNMPGET' to determine if the
device or interface is up or down.  The reply
it gets back from the device is not generally
referred to as a 'trap' or an 'event', but rather
merely a reply to the netmon poll.  From this
reply, netmon determines if the device/interface
is up or down, and sets the database status and
GUI symbol color accordingly.  It also sends an
internal trap to 'trapd' which displays an
event looking message on the various event
viewers.

In addition to this, various device agents can
send in traps of their own, not in response
to a netmon poll.  These are displayed in the
event veiwers, but do not affect the status in
the database or the symbol color.

Unless I'm horribly wrong.  If so, someone please
straighten me out.

Thanks,

Les



>From: "S. Varathu, IBM" <Varathu AT bom4.siemens.co DOT in>
>Reply-To: IBM NetView Discussion <nv-l AT tkg DOT com>
>To: "'IBM NetView Discussion'" <nv-l AT tkg DOT com>
>Subject: RE: [NV-L] Netview discovery status
>Date: Sat, 17 Mar 2001 14:51:46 +0530
>
>Thanks Les, But still i have doubt. For an example, if i define netmon
>polling interval is 10mts. when it polls to device and one of the interface
>is down for the device and display the same down inofrmation in GUI.(object
>DB also). Immediately after the poll,  the interface is UP, so the device
>send the trap information to netview about the status. In that case what
>would be the object database? will netview display "UP" information?
>
>Once again thanks for the info..
>
>varadhu
>
>
> > ----------
> > From:       Les Dickert[SMTP:lesdickert AT hotmail DOT com]
> > Sent:       Friday, March 16, 2001 10:26 PM
> > To:         nv-l AT tkg DOT com
> > Subject:    Re: [NV-L] Netview discovery status
> >
> > Yes, NetView updates the status of objects in
> > the database, and on the maps, based on polling
> > for status.  Events received by NetView have no
> > affect on either, unless you write a special event
> > (trap) handler to do it.  James Shanks has previously
> > (many times) posted a method of changing the status
> > of an object, which could be done upon receipt of
> > an event, but remember that NetView (netmon) is still
> > going to poll for status and might change the status
> > right back.
> >
> > Remember that if a device can send an event trap
> > to NetView that means there is IP connectivity to
> > the device and therefore netmon will think it is
> > up and operational.
> >
> > Les Dickert
> > Verisign Consulting
> >
> >
> > >From: "S. Varathu, IBM" <Varathu AT bom4.siemens.co DOT in>
> > >Reply-To: IBM NetView Discussion <nv-l AT tkg DOT com>
> > >To: "'nv-l AT tkg DOT com'" <nv-l AT tkg DOT com>
> > >Subject: [NV-L] Netview discovery status
> > >Date: Fri, 16 Mar 2001 15:41:41 +0530
> > >
> > >hi,
> > >
> > >Does netview update the status of objects in topology database based on
> > >polling on each device or can trap event generated by the device (say
> > >router) which reflect to corresponding change in topology map?
> > >
> > >Regards,
> > >varadhu
> > 
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