I have a cisco Cat 3560G switch trunked to a 3com 4200 L2 switch. I have 4 Vlans created on the Cisco L3 switch like Vlan 10, 20, 30 and 40 and created only 20 and 30 on the 3 COM. All the trunk port configurations are fine. However when i assign a PC to any existing Vlan in the 3 COm like 20 or 30 i am not able to reach the the Vlan ip in the Cisco Cat switch. And also should i create the other Vlans also like 10 and 40 on the 3 com for full communications between the 2 switches. Could any one please help me?? Thanks in advance.