I was trying to segment my internal server networks with Cisco ASA 5580-40 FW. The different servers were segmented into different vlans and works fine without the FW. However, whenever the FW DMZs are connected to ports associated to the different vlans some servers on same LAN stops communicating at Application level. When all the other vlans are shutdown leaving only the vlans where servers that are having issues resides, everything resumes work normally.
Don't know what issues are with the LAN. Could someone advise what could be going on here?