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teemo123's avatar
teemo123
Icon for Nimbostratus rankNimbostratus
Mar 01, 2024

F5 is sending via correct IP with an incorrect MAC address

This has been a bummer and I've scoured the internet looking for answers and came up with nothing so here I am. We have a standard VS with SNAT Automap enabled. We have the following self IP xx:x...
application delivery
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teemo123's avatar
teemo123
Icon for Nimbostratus rankNimbostratus
Mar 02, 2024

Hi Michael, we have checked that MAC masquerade is not enabled so the Source IP and MAC is correct. However, when we checked the server's ARP table, we see that x.x.x.60 is associated with the MAC address xx:xx:xx:xx:7c:03 while x.x.x.59 is associated with xx:xx:xx:xx:5e:0b. This causes the server to reply to the correct IP with wrong MAC address. We are also certain that no health monitor traffic included in the capture.