We are in a process of replacing a pair of 3750 with Cat 9500. Below is the current set up, the FW using its LAN port to connect to Core router via MR switch as a host. I would like to know what is the best practice steps for this procedure. I want to use the 3750 as distribution switches since the pair Cat 9500s have 32 ports total. Do I have to make another LAN port for the firewall to connect straight to 9500? Also, while when I'm migrating the SVI over to 9500, what are the cautions I should keep in mind to minimize the interruptions?