just stack them like they're supposed to be using the 40gb ports on the back, and you'll have seamless failover. You can stack/connect the 6450 to the two 6610s, and yes the 6610s will be the "brains" for the 6450 routing wise. However if you lose the master 6610, the second one will take over the master role and still perform the routing brains for the 6450(emphasis mine)
I plan on stacking two ICX6610s in some form of extended/ring mode (not failover). As I understand it, I can only use PoE ports on one device if not in failover/master-slave mode.
Could someone use two ICX6610 in this configuration, with a single ICX6450 as part of the stack?
Had the idea that I could use an ICX6450 in the office, and possibly stack it across 2x10G ports - one to each ICX6610. But if one 6610 reboots, I wouldn't want everything go offline. Would the ICX6450 use the other 6610?
also not sure what you mean about not being able to use poe ports on other units, poe functionality is unchanged during stacking and you can use poe on any stack member