Hi Esmjimen,
Whether there are any restrictions in using 1G/10G SFP/SPP+ uplink on 4948E-F. The answer is there are no restrictions. As an example, they can use 3 uplinks for 10 SFP+ and 1 uplink as 1G SFP or any other combinations.
Please let us know if you have more questions.
Thanks,
Claire