Hello Peterpan, - whether running BGP will have a significant impact on performance? Ans: It depends upon how many routes you are having into your PAN routing table. Generally speaking, if you configure BGP on a PAN firewall and having route-filter to import and export limited routes from PAN firewall, in that situation it would not take large CPU cycles from the PAN management plane. --As the existing firewall traffic does not run BGP, my plan is to run this AWS VPN on a different virtual router with 2 separate external and internal interfaces totally segregated from existing firewall traffic but still performs traffic inspection. Does this work? Ans: Yes, it will work perfectly. As, creating an another virtual-router means, the PAN firewall will create an another routing table ( segregation of routing table) --Do you have any best practice and recommendations for this VPN connectivity? Ans: VPN traffic will be encrypted by ESP/AH header. Hence an extra layer will be added on the top of the packet. Hence adjust the TCP MSS or reduce it to 1420 will be a good practice. Secondly, using a higher length encryption key ( AES-256, 3 DES ) might bring latency during traffic flow, because it will take more CPU cycles to encrypt/decrypt traffic on PAN firewall. I would recommend you to use AES-128 on both VPN gateways. Hope this helps. Thanks
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