Default Gateway: 10.1.1.1/24
Router2: 10.1.1.1
ASA5520: 10.1.1.100
g0/0: outside , connected to DepSW
g0/1: inside1, connected to SWA
g0/2: inside2, connected to SWC
PC1: 10.1.1.11
PC2: 10.1.1.12
PC3: 10.1.1.13
1. Blocking unwanted traffic from outside host (say PC3) to inside host (say PC1, PC2)
2. Redundancy for switch SWA and SWB, SWC and SWD.
3. PC1, PC2, PC3 MUST use same subnet 10.1.1.0 /24
Problem
PC1, PC2 and PC3 can be ping each other before I connected on the interface g0/2 on ASA. After connected and enable the infterface g0/2 on ASA, non of the PC1, PC2 and PC3 can be ping efach other. It seems have looping in path ASA, SWA, SWB, SWC and SWD.
Is it I needed to set the STP on the ASA interface g0/1 and g0/2?