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Synergie-PR
8 Posts
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29648
July 20th, 2012 01:00
False Duplicate Device Detected...
Hi,
I will take benefit of the summer to migrate from ITA to OME. And I have a serious problem with the detection of Duplicate Device.
My OME is discovery ~20 subnets, In this 20 subnets there are many servers with same HostName (not fqdn).
I think OME is use Netbios Name to detected duplicate. There is a way to disable this function ? Or make it only of FQDN...
In Log I have lot of :
A duplicate device has been detected. Device xx.ZZ.local (idZZ) was deleted because the Device Name was associated with a new deviceID ipYY (idYY)
Discovery is re-using the database entry for Device xx.YY.local based on name only. Either discovery could not obtain MAC Address information for the device during a previous discovery or there are two devices on the network with the same name.
Discovery is re-using the database entry for Device xx.ZZ.local based on name only. Either discovery could not obtain MAC Address information for the device during a previous discovery or there are two devices on the network with the same name.
There is a parameter to not have that false detection of duplicate device ?
DELL-Abhijit P
Community Manager
•
711 Posts
805
0
Posted July 20th, 2012 07:00
Hi,
Thanks for your post.
Can you check the discovery setting under Manage->Discovery and Inventory->Discovery Schedule and see if the Name resolution is set to DNS or NetBIOS. The default for OME is DNS and if the hostnames are setup appropriately in DNS with the reverse lookup working, OME should be able to use FQDN instead of NetBIOS.
Regards
Abhijit
DELL-Abhijit P
Community Manager
•
711 Posts
805
0
Posted July 20th, 2012 10:00
Hi,
Thanks for the updates.
Looking at the log messages, it looks like OME is not able to get the MAC Addresses causing this issue. Are the servers which are discovered, successfully classified and do you see inventory data with MAC addresses for those? Which protocols are you using?
You mentioned that it is working in ITA. Is it possible for you to compare the "dconfig.ini" files in your OME and ITA installation? The file is located at "C:\Program Files (x86)\Dell\SysMgt\Essentials\configuration". Look if you see any entries in the "SYSTEM_NAME_EXCLUDE_LIST" entry which are present in ITA and not in OME.
Regards
Abhijit
Synergie-PR
8 Posts
805
0
Posted July 23rd, 2012 01:00
Hi,
With same name (Netbios), there are server physical and other virtual. The MAC Address change when a new discovery of a subnetwok is doing... (Card Network and MAC is different for each server). (When is an Virtual, the detail of the server is not associate with the good Host...)
For all subnets I use : SNMP & WMI. Now, the Troubleshooting tool is outside Essentials, so it's more difficult to check password for WMI... So I have check and change all password to be sure of the twice protocols are working correctly.
I have check dconfig.ini :
The only difference that I found is the MAC on PRIVATE_MAC_EXCLUDE_LIST : 0000000000000000. Is not in same order on ITA and OME...
Regards
PS : When we make Interface (Dell Community) in french we aren't able to reply...
DELL-Abhijit P
Community Manager
•
711 Posts
805
0
Posted July 30th, 2012 09:00
Hi,
OME does not list virtual servers (guest VMs running on physical host machines) in the device tree. That is a difference in behavior from ITA. If you are discovering virtual servers, it may generate those log messages. Is it possible for you to have separate discovery range for physical servers?
The order of the entry shouldn't matter.
Regards
Abhijit
Synergie-PR
8 Posts
805
0
Posted July 20th, 2012 07:00
Hi,
Yes, setting is on DNS.
My DNS is setup correctly with reverse, I haven't this problem with IT Assistant, and settings looks same, .ini too ...
Regards