So I have two Balance One routers with SpeedFusion licenses. Each is placed at different site and have 2 WAN links (t1 and cable). Right now they are connected trough standard Layer 3 VPN but I’m wondering if what I’m trying achieve is even possible.
Balance One (Site 1)
LAN IP: 172.22.60.1
Balance One (Site 2)
LAN IP: 172.22.59.1
Most of my servers are located on Site 1 and are VMs (ESXi). I’m also using Zerto software for replication and currently both hosts (production and DR) are located on Site 1 and have IP addresses from 172.22.60.0/24 subnet. I want to move my DR host to Site 2. In case of some emergency when my production hosts goes down I need to start VMs from DR host but they all will start up with IP addresses from 172.22.60.0/24 subnet and gateway set to 172.22.60.1. If I understand it correctly Layer 2 VPN would be right choice but I would have either change IP addresses for all devices on Site 2 to 172.22.60.0/24 also or change subnet on both sites to /23 but then all internet traffic from Site 2 would have to go trough VPN and then gateway on Site 1, is that correct? I need to avoid that because I don’t have enough bandwidth available (50/10 and 10/10 for Site 1 and 16/2 and 1.5/1.5 for Site 2). Is there any other way to achieve what I need? Thanks.