I'm looking at forklifting a network that I've inherited and am looking for help in determining the best design for my needs. The network currently suffers from extreme slowness, and excessive outages. There has been relatively little documented about this network so I'm still in discovery process myself. The network hardware is all layer2 Allied Telesyn, which most if not all are extremely outdated. There are 7 buildings connected with a mix of single and multi-mode fiber backbones. There are about 600 nodes attached to this flat network which are a mix of printers, Windows, and Mac machines. My current thoughts are to replace all Allieds with Cisco gear. I will be working with a relatively small budget so I may need to work on this project in a several stage approach. I'm thinking that I would like to implement between 10-12 routable vlans for some network segmentation and security. My current thoughts are to use possibly something like 3750's to handle all the vlan routing in key locations throughout the organization and then use something a little less expensive like 2960's in each building for client access. Hopefully the experts will chime in and be able to help with a successful deployment.