I personally like to stack switches for redundancy. I think its just easy to do plus you don't have to worry about Spanning-Tree. You just have one logical switch and its just easy. But there are times when I just want to disable the stacking feature. Using the fiber ports (ports 1 and 3 on an ICX6450) for uplinks is great, but when connecting them to other uplink ports, you can create a stacking config without even trying. When the 'stack disable' command is issued, a unit does not listen for or send stacking packets, which means that no other device in the network can force the stacking-disabled unit to join a traditional stack (from the documentation). Here is what it looks like when you run the show stack command and its disabled.
ICX6450-LAN1#sh stack
***** Warning! stack is not enabled. *****
alone: standalone, D: dynamic config, S: static config
ID Type Role Mac Address Pri State Comment
1 S ICX6450-24 alone cc4e.2432.c880 0 local None:0
+---+
-2/3| 1 |2/1-
+---+
Current stack management MAC is cc4e.2432.c880
Note: no "stack mac" config. My MAC will change after failover.
ICX6450-LAN1#
ICX6450-LAN1#
ICX6450-LAN1#
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