1. Overview
This project focuses on establishing a hybrid networking environment between a simulated on-premises datacenter (VNet) and Azure utilizing Azure VPN Gateway in both Active-Standby and Active-Active configurations.
2. Objective
- To understand traffic flow patterns in different VPN Gateway modes.
- To analyze traffic behavior and path routing during VPN instance reset scenarios.
3. Test Conditions
- Network Configuration: A hybrid connection was established between a simulated On-premises environment (Active-Standby) and Azure (Active-Active).
- On-Premises CIDR:
192.168.0.0/24
- Azure VNet CIDR:
10.0.0.0/24, 10.0.10.0/24
- Test Methodology: TCP SYN traffic was generated using
hping3 to analyze packet routing behavior and instance distribution across VPN gateways.
- Test Scenarios: 300 SYN packets were sent in both directions using the command:
hping3 -S -c 300 "IP"
- On-premise (Active/Passive) → Azure (Active/Active)
- Azure (Active/Active) → On-premise (Active/Passive)
4. Test Results
4.1 Traffic Flow in Active-Standby and Active-Active Modes
Packets were captured on both the VMs and the VPN gateways. The following results show only the filtered SYN packets from the TCP connections.
- Traffic Direction: Simulated On-Premise (VPN Active/Passive) → Azure (VPN Active/Active)
