You need to give us more details about the problem you are facing.
From what I understand so far, you see duplicate MAC faults for IP addresses 10.10.0.88 and 10.10.4.2, right? This basically means that these IP addresses are "seen" by the ACI Fabric using multiple MAC addresses, the real one and the LB's MAC.
You have to see how and why there is traffic generated by LB, for that Source IPs. It could be something expected (doing some IP sync using ARPs, similar with how Checkpoint is doing).
I would suggest you verify this: what traffic is being sourced by LB using SMAC it's own MAC and SIP the affected IPs.
Depending on the results you should take different directions to investigate.
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