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[nv-l] Using @limit_discovery in a seedfile

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Subject: [nv-l] Using @limit_discovery in a seedfile
From: Jane Curry <jane.curry@skills-1st.co.uk>
Date: Tue, 29 Mar 2005 20:09:11 +0100
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Following on from Paul's excellent Tivoli Support Technical Exchange presentation on NetView discovery, I asked a question about the use of @limit_discovery in a netmon seedfile. Does anyone know definitively what it does??

My understanding goes like this:
There is a "master" auto-discovery on/off switch that can be applied on a Unix NetView from Options -> Topology status Polling. If auto-discovery is set to off then netmon only discovers EXPLICIT entries in the seedfile; wildcards and ranges will have no effect.

If auto-discovery is on then wildcards and ranges can be used in the seedfile. The IMPLICIT imperative in a seedfile with any wildcard or range is that anything OUTSIDE the explicit entries, wildcards and ranges will NOT be discovered. As Paul pointed out, a wildcard or range does not actively go out and find anything - it simply means that if the auto-discovery process finds a node that is included in a wildcard or range, then it will be permitted into the NetView object database.

If these 2 understandings are correct, why use @limit_discovery? Either turn the "master" auto-discovery switch off and simply find explicit entries in the seedfile, or, if you want to use ranges with the master switch on, how does @limit_discovery in the seedfile limit discovery beyond the normal exclusion of objects as described above?

If we get a good thread running on this, perhaps we could move it to the NetView Tivoli User Group website for more in-depth discussions?

Cheers,
Jane

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