Looking through the user guide for the switch it shows this for guidelines on assigning IP addresses to VLANs.User Guidelines • Assigning an IP address to an interface does not disable L2 protocols, such as STP. • Defining a static IP address on an interface implicitly removes the DHCP client configuration on the interface. • Interface context may be VLAN 1 only Added with the message you are receive when trying to assign an IP address to another VLAN, it looks like just the management VLAN 1 is capable of having an IP address assigned to it.
Hello, I tried to find the features to assign a VLAN management IP address to Powerconnect 2848.  However, it could not find this features.  Is that anyway to edit it?  Thanks in advance.  
How to assign a VLAN management IP address to Powerconnect 2848