When creating a single-hop BFD session for the first time, bind the single-hop BFD session to the peer IP address and the local address. To modify a configured BFD session, delete it and create a new one.
Comprehensive and Detailed Step-by-Step Explanation:
1. Single-Hop BFD Session:
A single-hop BFD session is used to detect link failures between directly connected devices.
It is bound to the local IP address and the peer IP address, and the session relies on these parameters to establish connectivity.
2. Why Modifications Require Deletion:
BFD sessions are tightly bound to their configuration parameters (e.g., local and peer IP addresses).
Modifying these parameters is not supported for an existing session. Instead, you must delete the session and recreate it with the updated parameters.
3. Why the Statement is TRUE:
The statement correctly describes the behavior of BFD sessions, where modifying an existing session is not possible without deleting it first.
[Reference:, Huawei HCIA-Datacom Study Guide, Chapter "Single-Hop and Multi-Hop BFD.", , , ]
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