Without seeing a topology it may prove to be a little difficult to give recommendations. Is the 6248 your core switch? Does It connects to your firewall? Are all of these edge switches setup as L3 switches that basically are their own broadcast domain? If so, then what you are wanting to do would work. All the edge switches would have a blanket static route that directed traffic to the 6248. Then on the 6248 you place a static route pointing out to the firewall.  If all the edge switches are in L2 mode, and the 6248 is the only L3 switch on the network. Then the edge switches will not need any static routes.  
Hi All, I guess this a very basic network design question. Is it good practice/acceptable to use the Dell 6248 layer-3 switch as the gateway / next-hop router, even though the correct gateway is directly connected to the same subnet/vlan? The issue is that we are in the process of making changes to our network, and several of the routers on the edge of our network have static routes configured so they can reach our other subnets, both local and remote. These static routes will need to be changed when we move from one circuit to another, but some of the edge routers are vendor managed, and it is inconvenient to get them reprogrammed. Also, the vendors will need to make the route changes more than once, if we want to clean up our ip addressing scheme after the move. Once the changes are made, the network topology likely will not change for a long time, so I would like to stick with static routing. Since we can enter and control the static routes in our Dell 6248, can we just tell the vendors use our Dell switch as the next-hop router when they change their static routes? I know ip redirects might attempt to "fix" this inefficient setup, and that could cause problems, at least during the transition phase. On a smaller network with 10 servers, 100 computers and 80 phones, is this extra routing inconsequential for the Dell 6248 layer-3 switch, or is this setup something you should avoid (for other reasons)? Thanks for your insight! 
Dell 6248 as default gateway - next hop router