Differentiate between host with same IP but different MAC

[Will Higdon <higdons () hotmail com>]

This may have been answered but we need help finding the answer:

We have three networks containing multiple cloned hosts (200+ hosts per network) with the same IP addresses and 
hostnames but different MAC addresses
For example
Net 1
Hostname           IPAddr                  MacAddr
Server1                16.5.4.3                11:23:14:AA:BB:SS

Net 1
Hostname           IPAddr                  MacAddr
Server1                16.5.4.3                11:23:18:AA:BB:TT


Net 1
Hostname           IPAddr                  MacAddr
Server1                16.5.4.3                11:23:00:AA:BB:RR

All traffic from each network is sent to/through one data aggregator to the Snort sensor
How do we filter inside the sensor to differentiate between the servers?

Extra information: We use Snort connectors to get the alerts to the SIEM

Thank you
/Ian

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