We are currently considering using a 2621 router with dual 10/100 Ethernet ports to segment our LAN. We have 5 remote closets all connected to the core switch via 1000Base fiber. We have no layer 3 capable switch and no budget to purchase one this year. The first question is, will the router be overloaded once we move 150 users on the new segment it would create, and would it cause noticable latency. The second question is, can the router be used as DHCP for the new segment, but not the old? I know the router can be used as DHCP when 1 ethernet port is being used, but am not sure how to assign it to only one port.
Any information or advice would be greatly appreciated.