I have 3750 Series swicth and 2950.
Problem: My Problenm is that i could communicate between same VLAN and even with diffrent Vlans after doing the following configuration.i have attached my configuration.
1. I had configured the 3750 with VLAN 2,3,4,5,6 i have configured VLAN 6 as my Management Vlan.
2. I have enable the routing in 3750.
3. I have made enable the switch trunk encapsulate dot1q.
1. I have assigned diffrent port with diffrent Vlans.