SonicWall Firewall behind Cisco ASA Failover problem

SonicWall Firewall behind Cisco ASA Failover problem 1 - Resolution with screenshots

Situation: The client has two Cisco ASA as failover firewall. They would like to add one SonicWall NSA 2400 to use these features: intrusion prevention, gateway anti-virus, and anti-spyware. However, some computers in the LAN work but others don't. All computers are in the same subnet with ASA inside IP address as default gateway.

Troubleshooting: After checking all computers connections, we find working computers are connecting to a switch connecting to SonicWall only (for example computer with IP 10.0.200.50) . The problematic computers are connecting to a switch that is connecting to both ASA and SonicWall. The resolution is connecting all switches to the SonicWall only. Make the SonicWall as bridge. Please refer to this page: Design for setup SonicWall as Bridge behind Cisco ASA

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