I find the following in "http://support.f5.com/kb/en-us/solutions/public/7000/700/sol7751.html" that:
SSL CMP @ 500 TPS per core is now enabled in the base license for the BIG-IP 1600, 3600, 390...
There are 8 cores in the 2100 Blade, so I would expect the aggregate license limit to be 8 x 500 = 4000. Just be careful you don't have anything running that will drop you out of CMP.
Jeff