Never mind - after a little research and consideration I figured this out.
I'm very new to configuring vLANs on Dell layer 2 switches, so bear with me. In the past I've always used Cisco multilayer / layer 3 switches (e.g. 3950 Series), which seems a lot more straight-forward to me. Basically, this is what I need to do: I have a PowerConnect 5448 switch that I need to segment into three separate vLANs for three subnets: 111 (for 192.168.111.0), 113 (for 192.168.113.0), and 114 (for...well you get the idea). Being a layer 2 switch, I'll of course need a router for the vLANs to communicate with one another. I have a Juniper J2350 router that I can use. Here is what I am thinking makes sense - please let me know if I am wrong! Basically, on the switch I will tag four separate groups of ports: Port 1 as a Trunk port for VLAN 111, 113, and 114;Ports 2 - 14 for VLAN 111;Ports 15 - 46 for VLAN 113;Ports 47 - 48 for VLAN 114Port 1 will be connected to the interface on the Juniper router. The router's physical interface with be configured with three separate logical interfaces with Ethernet switching enabled and the port mode set to trunk (correct?): 192.168.111.254 with a vLAN ID of 111192.168.113.1 with a vLAN ID of 113192.168.114.1 with a vLAN ID of 114On the switch, I would also like to enable portfast on ports 2 - 48, but leave it disabled on port 1 - is this correct?I'm also a bit confused about the default vLAN 0. I'm guessing there's no reason to tag any ports with this vLAN?  Thanks for your help!
Just need a sanity check: PowerConnect 5448 + Router