Device Discovery in LMS 3.2

Answered Question
Nov 9th, 2009
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I have imported a list of devices into LMS 3.2 from a previous device export from my old Ciscoworks Server to ensure the right number of devices are added.


I am looking to do a discover on some devices that are being managed on another network range. How can I achieve that and not hinder my current device list count?


Basically I have 477 devices, I want to make sure the devices that loopbacks are being managed on another network segment.

Correct Answer by Joe Clarke about 7 years 6 months ago

The way the sysName resolution works is to first resolve the sysName to an IP.  Then, the product of THAT resolution is resolved once again to get the management hostname.  This last resolution is superfluous, but unfortunately required to see a hostname.  Therefore, make sure you have PTR records setup for all of the IPs to which your sysNames resolve.

Correct Answer by Joe Clarke about 7 years 6 months ago

Make sure you choose NOT to use DCR devices as seeds (the default), then just configure the seed devices on your other network segment. That way, the new devices will be discovered while leaving the existing DCR devices as-is.

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Correct Answer
Joe Clarke Mon, 11/09/2009 - 12:15
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Make sure you choose NOT to use DCR devices as seeds (the default), then just configure the seed devices on your other network segment. That way, the new devices will be discovered while leaving the existing DCR devices as-is.

dionjiles Mon, 11/09/2009 - 12:20
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Thanks I was thinking that was the answer will performing the option ping sweep on IP Range give me the same results?

Joe Clarke Mon, 11/09/2009 - 12:22
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Yes, provided the DCR devices are not being used as seeds. If they are, then Discovery will attempt to update DCR with new IP information.

dionjiles Mon, 11/09/2009 - 12:25
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Well I haven't configured any seed devices....I just used the file I exported from the old server. So I am assuming I should be ok.

Joe Clarke Mon, 11/09/2009 - 12:27
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Well, you'll need to configure seed devices for your other network segment. Without any seeds, Discovery will not work.

dionjiles Mon, 11/09/2009 - 13:34
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Understood...and will do.


Thanks for your help.

dionjiles Tue, 11/24/2009 - 06:58
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Hi,


When running the discovery I have the Preferred DCR Display name set to Host Name and Preferred Mgmt IP to resolve by SysName, yet I am still

getting nothing but IP's.


Am I do something wrong?

Correct Answer
Joe Clarke Tue, 11/24/2009 - 09:31
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The way the sysName resolution works is to first resolve the sysName to an IP.  Then, the product of THAT resolution is resolved once again to get the management hostname.  This last resolution is superfluous, but unfortunately required to see a hostname.  Therefore, make sure you have PTR records setup for all of the IPs to which your sysNames resolve.

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