I'm making some assumptions here, so If I'm wrong, please correct me.  Here's how you should configure the 6248 and this is just an example.  The ports you use may be completely different.  Just make the substitutions as necessary and you should be fine: Create a VLAN 10 and VLAN 20 enable config vlan database vlan 10,20 exit Assign an IP address to VLAN 10 interface vlan 10 ip address 216.2.69.1 /30 exit Assign an IP address to VLAN 20 interface vlan 20 ip address 216.2.234.65 /29 exit enable routing globally ip routing Go into an interface that you are connecting to the ISP and put it in access mode for VLAN 10 interface ethernet 1/g1 switchport mode access switchport access vlan 10 spanning-tree disable exit Go into the interface or interfaces you will use for your servers.  If you are connecting the servers directly to the 6248 you would do the following: interface range ethernet 1/g2-1/g4 switchport mode access switchport access vlan 20 spanning-tree disable (but only if you are connected directly to the servers) exit Configure a default route to get to the ISP from the internal public addresses ip route 0.0.0.0 0.0.0.0 216.2.69.2  If your ISP is .69.1 and you are .69.2, your last route statement needs to point to .69.1 instead of .2. I hope this makes sense.
My ISP said I needed a Level 3 switch; I have a couple of Dell 6248P's. I get a single IP in the range 216.2.69.x/30 and a default gateway. I ALSO get 5 (usable) IP's in the range 216.2.234.X/29.  I have 3 public web servers with separate IP's I need to host on the Internet (they are firewalled/DMZ'd through Microsoft's TMG). My ISP expects me to route my public IP's 'through' the 216.2.69.X gateway.  Not just switch the 5 usable IP's, I have to route them. Can I do this with a single Dell 6248p?  VLAN tagging wouldnt' work, I don't think, as who knows if whatever web site we're surfing too, or whatever customer is looking at our public IP's, would support vlan tagging. Can I do a 'physical segmentation' on say 4 of the ports then setup a route from   216.2.69.1 => 216.2.234.64, 65, 66? and 216.2.234.64, 65, 66? => 216.2.69.1 with the 6248's routing? If the Dell PowerConnect 6248 cannot do this, can anyone recommend a router that can? Thanks, == John ==  
ISP / Public IP Routing with PowerConnect 6248p