A company is deploying Cisco Secure Firewall Threat Defense with IPS. What must be implemented in inline mode to pass the traffic without inspection during spikes and ensure that network traffic is…

Changing the interface mode to Routed alters the fundamental network deployment from Layer 2 inline inspection to Layer 3 routing, which does not address IPS bypass during spikes.

Propagate Link State is a feature used in high availability or specific network designs to synchronize interface link status and does not provide an IPS bypass mechanism for overload.

Increasing the MTU to 9000 (Jumbo Frames) can improve network performance for large packets but does not provide a mechanism to bypass IPS inspection during high load or failure conditions.

The Snort Failsafe option (also known as Bypass or Fail-Open) is specifically designed for inline IPS deployments to ensure that if the Snort inspection engine becomes overloaded or crashes, traffic will bypass inspection and continue to flow through the device, preventing network disruption.