Network Node Manager (NNMi) may not discover some nodes even when inserted via seed presenting as a result of the discovery "Node not created (duplicate seed)". However, these nodes are not in NNMi Database.
Unable to add seed - Node not created (duplicate seed)
NNMi uses a number of complex algorithms to detect that a node being processed is really a duplicate of another node in the database. In some cases, NNMi compares MAC addresses to try to determine if a node has received a new IP address due to a DHCP lease expiring. A possible solution is to use macdedupexceptions (see below for instructions).
(1) Create file macdedupexceptions.txt file in below path:
sudo touch /var/opt/OV/shared/nnm/conf/disco/macdedupexceptions.txt
(2) Provide full permission for this file using: sudo chmod 777 /var/opt/OV/shared/nnm/conf/disco/macdedupexceptions.txt
(3) Open the file, add entry for sysOID of device in the first line: for example> .126.96.36.199.4.1.8072.3.2.10
Save the file
(4) Restart NNMi services (must do to take effect) ovstop -c ovstart -c
Note: You need to enter the SysOID for the specific device.
The following is an example of a macdedupexceptions.txt file:
# F5 BIG-IP Pb200 loadbalancer device