Cisco
352-001 · Question #4
352-001 Question #4: Real Exam Question with Answer & Explanation
The correct answer is A: LACP system priority and switch MAC address. The LACP system ID is an 8-byte value formed by concatenating the 2-byte LACP system priority with the 6-byte switch MAC address, uniquely identifying a device in LACP negotiations.
Question
A network designer is working with a company to improve convergence at the Layer 2 control plane and decides to use LACP. Which of these components does LACP use to create the system ID?
Options
- ALACP system priority and switch MAC address
- BLACP port priority and switch MAC address
- CLACP port priority and port number
- DLACP system priority and port number
Explanation
The LACP system ID is an 8-byte value formed by concatenating the 2-byte LACP system priority with the 6-byte switch MAC address, uniquely identifying a device in LACP negotiations.
Common mistakes.
- B. LACP port priority is used as part of the port ID in combination with the port number - it operates at the individual port level and is not a component of the system-level identifier.
- C. Port priority and port number together form the LACP port ID, which governs individual port selection within an existing aggregate - neither value contributes to the system ID.
- D. While LACP system priority is correctly part of the system ID, port number belongs to the port ID structure - combining system priority with port number does not correspond to any valid LACP identifier.
Concept tested. LACP system ID construction using priority and MAC address
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