Many years on the porch
Sean, I have a rod in that same condition; inherited it after taking it down from the nails on the porch. The rod is so far gone that individual fibers in the pieces are loose. It will never be more than a wall ornament. Luckily, no other of my cane antiques is anything like this one.
If you're really intent on repairing this rod, you might want to touch base with someone like Russ Gooding at Golden Witch Technology in PA, for a q&a on whether it's worth it to bother.
Of course, you can do a web search on cane rod repair or buy any of the wonderful books available, also.
I'm PM'ing you with contact info, so as to avoid sponsorship static.