This is just a volunteer/community forum. If you want to contact Cisco support for that product: http://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html
Check p.332 of the CLI guide to see if this helps in the meantime: http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/sf30x_sg30x/administration_guide/CLI_300.pdf
Sorry that didn't help, but since you never actually asked a specific question or provided any details about what you are wanting to do, I am not sure what you are expecting here..
So now it sounds like you are asking about DHCP reservations? What firmware version are you running and are you in layer 3 mode?