VM-Series on - Sizing, Internet traffic, Scalability Considerations

[N-Open]

Dear Members,

Hope you are doing well. We need your support for VM-series FW setup on Azure and considerations.

We are planning to use 2 VM series in internet facing traffic and 2 VM series for internal traffic management.

When deploying these VMs what points we need to keep in mind so that we can expand these in the future based on the traffic - for example from 2 VM HA series to 4 VM in HA mode.

I believe the CPU memory of a single VM depends on traffic it can handle. We are expecting around 10,000 users active sessions to connect to web applications on the backend. Kindly guide the cpu and memory spec and handle

this traffic. What else information to collect from application team to handle traffic.

We are looking for active/passive design front end controlled byazure  public load balancer.

Please advice

[LAYER_8]

Normally these are sized by throughput requirements. What is your ingress capability in Azure? A 1Gbps frontend?