Once the new switch is officially available, you should see release notes and software which supports that the new switch. I believe there is a new software for that switch but I am not 100 % sure since there is no document yet.
Since 3550-24 has 24-10/100 TX ports and 2 GBIC port, you may need to use Transceiver to get 100BaseTx to 100BaseFx.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...