Comprehensive and Detailed Step-by-Step Explanation:
1. Port Priority in RSTP:
* RSTP (Rapid Spanning Tree Protocol) elects root and designated ports based on port priority and port ID.
* Port priority is a configurable value that helps determine which port becomes the root or designated port when multiple ports are eligible.
* The port ID consists of the port priority and port number. When priorities are equal, the port number is used as a tiebreaker.
2. Default Port Priority on Huawei Switches:
* On Huawei switches, the default port priority is 128.
* This value can be adjusted in increments of 16 using the command stp port priority.
3. Analysis of Options:
Option A: 1
* Incorrect. This is not the default port priority value.
Option B: 128
* Correct. This is the default port priority value on Huawei switches.
Option C: 4096
* Incorrect. This is not a valid default port priority value.
Option D: 32768
* Incorrect. This is the default bridge priority, not the port priority.
4. Summary:
* The default port priority on Huawei switches is 128.
:
Huawei HCIA-Datacom Study Guide, Chapter "RSTP Port Role Election."
IEEE 802.1D-2004: Rapid Spanning Tree Protocol (RSTP).