I'm about to setup 18/4 modules and plan on linking those to our DR site that is using 14/2 modules. Any issues connecting those (currently on 3.3.2 code)? And followup question to that assuming it's OK to run like that:
Prod site is Gen 2 supervisors and could move to 4.X code eventually. While DR site is Gen1 and thus staying on 3.X code. Any concern with FCIP tunnel between 3.X and 4.X code?