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Re: [nv-l] How does NetView determin the selection name of a device

To: Jane Curry <jane.curry@skills-1st.co.uk>
Subject: Re: [nv-l] How does NetView determin the selection name of a device
From: "Alan E. Hennis" <Hennis_Alan_E@cat.com>
Date: Mon, 17 Mar 2003 11:45:04 -0600
Cc: NetView mailing list <nv-l@lists.tivoli.com>
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Jane

Silly me. I assumed that the folks who manage DNS actually fulfilled my
request to also have reveres entries added. They did not. There is no
reveres on my loopback which is in my seed file. When I sent my post I
assumed that the reverse was correct. I guess I should have realized what
happens when one assumes. Thanks for your assistance.

Thanks
Alan E. Hennis
Systems+Process Division
309.494.3308
hennis_alan_e@cat.com


                                                                                
                                                    
                      Jane Curry                                                
                                                    
                      <jane.curry@skills                                        
                                                    
                      -1st.co.uk>                                               
                                                    
                                                                                
                                                    
                      03/17/2003 11:25   To: "Alan E. Hennis" 
<Hennis_Alan_E@cat.com>                                               
                      AM                     NetView mailing list 
<nv-l@lists.tivoli.com>                                           
                                         cc:                                    
                                                    
                                                                                
                                                    
                                                                                
                                                    
                                                                                
                                                    
                                           Subject:      Re: [nv-l] How does 
NetView determin the selection name of a device        
                                                                                
                                                    



Caterpillar: Confidential Green                 Retain Until: 04/16/2003
                                                Retention Category:  G90 -
                                                Information and Reports




Alan,
You give us your forward DNS entried but not the reverse DNS.  My bet
would be that your reverse DNS files have 172.22.97.69 resolving back to
ciml34001 ??  I would check that with nslookup from your NetView system.

Remember NetView generally starts with IP addresses, not names.  You
have emphasised this by putting 172.22.97.69 in your seedfile.  The
first thing NetView will try and do is ping that address.  If it works,
it will try and resolve the address to a name via DNS.  If it gets a
name, that will be used as the Selection Name key field in the NetView
object database.

Can you actually ping that loopback address?  I'm not sure precisely how
the algorithm works, but if NetView can't ping the loopback it may end
up pinging interfaces it CAN reach and then the DNS step will kick in on
the first interface that got a successful ping response - which looks
like it might be your ethernet interface.

Cheers,
Jane

Alan E. Hennis wrote:

>Esteemed List Members
>
>Here is my configuration
>
>      NetView 7.1.3 FixPack 1
>      RedHat Linux 7.2
>
>Can anyone provide some insight as to how NV selects the IP address used
to
>manage a device? Or more specifically how it selects the name of the
>device? I have a Cisco router with the following interfaces
>
>      !
>      interface Loopback0
>       ip address 172.22.97.69 255.255.255.252
>      !
>      interface Serial0
>       ip address 172.22.97.66 255.255.255.252
>      !
>      interface FastEthernet0
>       ip address 172.22.34.1 255.255.255.0
>
>Here are my seed file entries.
>
>      172.22.97.69             # cimlpeor - This is the loopback address
>      %172.22.97.65            # cimlpeor hub - This is used for our BRP
>because we have two hub routers one active and one standby
>
>Here are my DNS entries
>
>      Name:   cimlpeor.corp.cat.com       <=== This is the loopback
>      Address: 172.22.97.69
>      Name:   cimlpeor.corp.cat.com                    <=== This is the
WAN
>      Address: 172.22.97.66
>      Name:   ciml34001.pic.cat.com                    <=== This is the
>Ethernet
>      Address: 172.22.34.1
>
>I have manually added this device (i.e. Edit -> Add -> Object...) using
the
>loopback address. The device is added as cimlpeor.corp.cat.com. I do a
>demand poll to quickly discover the remaining interfaces and NetView
>changes the name of the device to "ciml34001".
>
>I have done a lot of reading about the optimal setup for DNS. Put the
>loopback into the forward and reverse lookup and the remaining interfaces
>only into the reverse. However for political reasons I may not be able to
>do that. I have also read posting about forcing NetView to use the
loopback
>address for management. I am still a bit confused as to why NetView
selects
>the device name of ciml34001 instead of what I want to use which is
>cimlpeor.
>
>
>
>Thanks
>Alan E. Hennis
>Caterpillar Inc.
>Systems+Process Division
>309.494.3308
>hennis_alan_e@cat.com
>
>
>
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--
Tivoli Certified Consultant & Instructor
Skills 1st Limited, 2 Cedar Chase, Taplow, Bucks, SL6 0EU, UK
Tel: +44 (0)1628 782565
Copyright (c) 2003 Jane Curry <jane.curry@skills-1st.co.uk>.  All rights
reserved.



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