There is no mention of stacking in the datasheet. I guess that is because the supported platforms are mostly routers and not newer catalyst switch models.
No, no such possibility in CML, nor in any other virtual world. Stackwise would require special cables to inter-connect switches in the back in a cross manner; Most of Stackwise configuration is automatic; switches elect Master/standby, top switch should be number 1. The major significant difference between stand alone and Stackwise switches is port density and port numbering system: Fa x/0/1 and Fa x/0/1 where x is number of stack switch.
I think CML switch supports upto 16 interfaces; if you need to connect more devices, you need add another switch and interconnect with trunk. This means configuring STP, trunks, and other protocols which are necessary skills for any network admin anyway; not to mention, those skills are tested on most certification exams.
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