Thanks for your input J.

I haven't seen and example of 2 (multiple) address for a resource connection

I'm avoiding bonding since I have simple switches.

The reason for not bonding is to have two LAN links on different subnets, each connected to their own switch. This way if a link or a switch goes down (scheduled or unscheduled), then the connection between the DRBD storage system would stay up and connected - like multipath for a SAN.

Bonding(LAG) can be used if the switches support MLAG (Multi-Chassis Link Aggregation - where 2 ports on 2 different switches work as a LAG bond).

So I take it DRBD does not support mulitpath between storage nodes within it resource configuration.