Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 396

Which task must be performed first to implement BFD in an IS-IS environment?

Answer options

• A. Configure BFD in an interface configuration mode.
• B. Disable Cisco Express Forwarding on all interfaces running routing protocols other than IS-IS.
• C. Configure all IS-IS routers as Level 2 devices.
• D. Configure BFD under the IS-IS process.

Correct answer: D

Explanation

The first step in implementing BFD in an IS-IS environment is to configure BFD under the IS-IS process, as it establishes the necessary parameters for BFD within that routing protocol framework. Other options involve configurations or settings that are not prerequisites for BFD activation in IS-IS.