For background, here is the scenario:
Initially we were looking at a high availability setup with 2 VM appliances, however, there is a restriction to a single AZ in that approach because of how the “floating IP / ENI” works.
However, this environment will span multiple AZ’s for redundancy and there is a published Palo Alto video on how they do this: https://www.youtube.com/watch?time_continue=130&v=xiPZHzdNRmI
I’m re-watching it again, but based on my setup of the initial PA devices here is what I think I’m seeing:
I just want to confirm this is the case so we roughly have an understanding of how we’ll how to build this out.
Solved! Go to Solution.
You are correct, our PAN-OS stateful failover solution requires an interface move which cannot happen between subnets and subnets do not span AZs.
For AZ redundancy, we recommend the load balancer sandwhich covered in the video you referenced. It doesn't track state between AZs but AZ failure is very rare and session restablishment for web based applications is usually transparent for the user.
Make sure you are using the latest template for the auto scaling solution: https://github.com/PaloAltoNetworks/aws-elb-autoscaling/tree/master/Version-1.2
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