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Re: snmp configuration question?????

To: nv-l@lists.tivoli.com
Subject: Re: snmp configuration question?????
From: Eric Pobst <epobst00@yahoo.com>
Date: Thu, 15 Nov 2001 07:40:30 -0800 (PST)
Leslie,

Here is the kicker, each IP has a minumum of 2 host
names assigned by DNS. Because of this, TEC uses both
origin and/or hostname to determine if it is a
duplicate event.  I plan on using the /etc/hosts file
to ensure the name resolution is consistent, but
because of "Round Robin" the origin may vary.  So with
that in mind, what my best solution may be to remove
the orgin/hostname duplicate check at TEC and only use
hostname for all events coming from NetView.

I did speak with the SA's on having "Round Robin"
removed.  As it turns out, they would like nothing
more than to have it removed.  We are going to plead
our case on why we would like to have it removed.  I
would be interested of any other issues you have
experienced concerning NetView and "Round Robin".  

Thanks,
Eric
--- Leslie Clark <lclark@us.ibm.com> wrote:
> If the receiving system (T/EC or Netview?) is Unix,
> I would
> have that system override your DNS for those AIX
> systems
> with multiple interfaces, and have them resolve both
> addresses
> to the same name. The name resolution is done on the
> receiving end, so it would not matter to the rest of
> your
> network. That round-robin business does cause
> Netview
> all sorts of trouble anyway. I usually end up
> putting such
> nodes in the /etc/hosts file and creating
> /etc/netsvc.conf
> with 'hosts=local,bind' in it so /etc/hosts gets
> checked first.
> 
> Of course if you are talking about thousands of
> nodes that
> would be an administrative problem as well as a
> potential
> performance problem. But for a few dozen, I would do
> it
> without question.
> 
> I'm still confused, though. The round-robin should
> only be
> a problem when resolving a name to an address,
> shouldn't
> it? Traps come in with addresses. And those
> addresses
> will be resolved to names and I thought you would
> get the
> same name every time. Are you having this problem at
> the T/EC, or on the Netview server that is passing
> traps
> to the T/EC?
> 
> And you DNS experts can take it from here, because
> that's all I know on the subject.
> 
> Cordially,
> 
> Leslie A. Clark
> IBM Global Services - Systems Mgmt & Networking
> Detroit
> 
> 
> 
>                                                     
>                                   
>                     Eric Pobst                      
>                                   
>                     <epobst00@yaho       To:     IBM
> NetView Discussion <nv-l@tkg.com> 
>                     o.com>               cc:        
>                                   
>                     Sent by:             Subject:   
>  [NV-L] snmp configuration        
>                     owner-nv-l@tkg       
> question?????                                
>                     .com                            
>                                   
>                                                     
>                                   
>                                                     
>                                   
>                     11/14/01 04:04                  
>                                   
>                     PM                              
>                                   
>                     Please respond                  
>                                   
>                     to IBM NetView                  
>                                   
>                     Discussion                      
>                                   
>                                                     
>                                   
>                                                     
>                                   
> 
> 
> 
> Does anyone know a way to configure an AIX snmp
> agent
> to send traps only as a particular ip (origin).  I
> suspect it is a simple entry in the snmpd.conf file,
> like address 10.160.1.23 or something along those
> lines.  The customer site I am at uses "Round Robin"
> (i am not big fan) so bascially one event could come
> in with origin1 ...open trouble ticket.....5 minutes
> later, the same event comes in with origin2 (same
> box)...opens new trouble ticket instead of treating
> as
> duplicate.  To avoid TEC work, if we could bind to
> one
> interface at the agent level, that should correct
> our
> problem and perhaps save a lot of on going work.
> 
> thanks,
> 
> Eric
> AIX 6.0.2
> 
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