When two load balancers that share the same MAC address (shared MAC) are added in a Smarts IP environment, the load balancers will over-write each other when discovered into the same Smarts IP topology.
To avoid this condition, Smarts Documentation [Devices sharing a common MAC address were overwritten/deleted] recommends the following:
Article explains if it possible to apply the invalidMACPattern attribute without starting a fresh domain?
Smarts 10.1.X
It is possible to use the invalidMACPattern without starting a fresh new domain.
To do this, use dmctl to edit/insert into the invalidMACPattern as follows:
./dmctl -s <IP domain name> put ICF_TopologyManager::ICF-TopologyManager::invalidMACPattern "<Pattern>"
Example
Note the following about the above: