I install IPAM only set the alert IP address conflict, remote change same IP address 2 VM and enable neighbor scanning to see arp table but not see IP address conflict and I check on switch show arp I see 1 MAC table.
Kindly check first the document below. Look for IP Address conflicts.
https://documentation.solarwinds.com/en/success_center/ipam/content/ipam-ip-address-conflicts.htm
Once you understand the scenarios, you will be able to identify if your IPAM is indeed getting all the information it needs to alert for IP Address conflict.
I test Static and Static used scan SNMP to 2 PC and scan SNMP neighbor. 2 PC ping time out and ping reply alternate between 2 machines. show arp on switch see MAC address alternate between 2 machines. but IPAM does not detect IP Conflict.
event on IPAM see change MAC address not detect IP Conflict
On what you are describing, the ARP table simply switches MAC address and does not really show both value at the same time, is that correct?
Same time, but sometimes IPAM sees a mac change, sometimes you don't see it.
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