I managed to connect ABC-3550 and XYZ-4507R. Workstations from each network could see each other. But when I added the Firewall (Fortigate-100A) in between ROUTER-A(2600) and ABC-3550. All of sudden I could not connect or ping PC's from ABC network to XYZ network. The firewall is configured as transparent mode with only the management ip (192.168.13.176, SMask 255.255.255.0) and gateway 192.168.13.1. Do you have any idea what is wrong? Hope that you could help me sort it out. Your help is much appreciated.
