What are the possibilities of connection/link failover in the following configuration: 2 geographic locations connected by 2 independent radios (a primary and a backup, the backup is a mikrotik device). The idea is to use the primary with higher bandwidth and if there is a malfunction, switch to the second (mikrotik) one until the primary becomes available. The network is equipped with Ciscos 2960s, 3650 and a router on the remote location site. The network heavily relies on VLANs which are in many cases shared between the locations. I have been suggested 3 options:
- Complete network separation and full routing
- It has the disadvantage of having to separate the shared vlans and in my view, complicating the structure of the network.
- I dislike this solution as it seems to be a travel back in time neglecting the advantages of vlans etc.
- Spanning tree
- Some network engineers dislike this and they claim it would clog the backup connection (nonsense as we have been running with ST on the planned backup for many years).
- LACP link aggregation
- There is a doubt how Mikrotik as an L3 device fits into this schema.
- The backup device management would not be available when the primary is active and vice versa.
Can you please comment on the above suggestions or provide any more suggestions that would work so that I could decide? Although I am not a cisco certified, but I know a thing or two about networks and for me option #2 is the most appealing, #3 has the problem of availability of the other device pair, otherwise I also like it but I wonder what you think.