I have a Cisco SG300-10 V05 in Layer 3 mode with the latest firmware release 1.4.11.5 installed.

I have four VLANs defined, but I unable to enable inter-VLAN routing via the GUI because the option for "IPv4 Routing" under IP Configuration / IPv4 Management and Interfaces / IPv4 Interface" that I have seen in so many online videos and how-to docs is missing!!

Is this feature not supported on the SG300-10 or is there some CLI / configuration file work necessary to get this to work on this model of switch?