There is no way to add additional ports to the switch you currently have; it is a "fixed" switch meaning that there's nothing you can do to expand it, etc.You could connect a second switch to the first switch, though you'll have a bottle neck at the ...
One option you could choose is to roll out the new Cataylast 9000 Series switches using the following:Access - C9300-24U-E (though you may need the -A version depending on what functionality you needed from IP-Base)Distribution - Two options (discuss...