An engineer configured OSPF on all routers in the data center in the same exchange as other routers. Layer 2 connectivity was established. Now, the engineer plans to implement BFD to detect failures in the forwarding path. Which action must the engineer take?
To implement BFD for fast failure detection in the forwarding path, it must be configured between each pair of adjacent routers. BFD operates by establishing a session between two directly connected routers and rapidly sending control messages to detect link failures. This means BFD configuration is required on all router interfaces that are directly connected to ensure comprehensive failure detection.
I've always read that cef was required for bfd.. I don't see a reason not to pick D
CEF is not mandatory for BFD to work
After doublechecking it, yes CEF is mandatory. sorry about that.
https://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/fs_bfd.html