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Re: [nv-l] unknown devices reporting to Netview

To: nv-l@lists.tivoli.com
Subject: Re: [nv-l] unknown devices reporting to Netview
From: James Shanks <jshanks@us.ibm.com>
Date: Fri, 14 Mar 2003 13:17:19 -0500
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This is a very strange situation if it is true.  Are you sure these are 
real traps and not sent by some script?

Network devices cannot just send traps.  They have to be configured to 
send a trap specifically to a certain address.   Somebody had to know that 
the address of your NetView was the address of a trap receiver.  How did 
they come upon that information?

Furthermore, these devices have to be connected to your network somehow. 
Do you not have a corporate firewall?  Most  of those prohibit SNMP 
traffic both coming in and going out.  And it is more interesting when you 
say that you cannot ping them.  traps are unsolicited udp datagrams.  They 
follow the same pathways as ICMP (ping).  So if you cannot ping the 
sender, then someone is blocking your pings somewhere.  That would 
indicate to me that you have a network/router group elsewhere which has 
configured a router to block them.   Is that the case here?  I would 
contact them and ask them to reconfigure the boxes not to send you traps. 
That is the best solution.  Then you don't waste time, energy, computer 
cycles, and precious network bandwidth, dealing with traps you don't want 
to see anyway.

Basically your options in NetView are limited. You can configure 
trapd.conf so that  trapd will just log the traps and that will get rid of 
the message you see.  You could also configure them so that trapd would 
neither log nor display them, just throw them away, but that is dangerous 
because you could wind up with a trap storm and never see any evidence but 
poor performance.   The only other thing you could do would be to install 
and MLM and set it up so that he forwards all traps to NetView except 
those you don't want to see.

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




"DePhillips, Frank" <fdephillips@McLeodUSA.com>
03/14/2003 12:15 PM

 
        To:     "'nv-l@lists.tivoli.com'" <nv-l@lists.tivoli.com>
        cc: 
        Subject:        [nv-l] unknown devices reporting to Netview




        I have three devices not on are network space that are trying to send 
traps to netview.  I can not ping these devices but get many alarms 
stating trap found with no known format in trap.conf.  Any ideas on how to 
best filter them from the alarms?
Thanks 
Frank DePhillips 


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