I have added a Cisco 3560-48TS to my exisiting network, which was based on a Nortel Baystack 450 stack. I have created vlans on the Cisco side, and have connected the Cisco to the Nortel via crossover cable. Network browsing is fine, as is all other network access, including internet and WAN access. However, access to the local file and print server, which is connected to the Nortel, is too slow for production level work by the users, when they are connected to the Cisco and are on anything other than VLAN1. They can see the files, but when opening a file from the file and print server it is extremely slow. If i change the port back to VLAN1, everything works just fine.
I changed the port settings on the crossover cable port on the Cisco side to be switch mode trunk, and added the encapsulation command, but no change.