Exam 350-401 topic 1 question 60 discussion

C seems like the best fit: The Link Management Protocol (LMP) is activated on each link of the StackWise Virtual link as soon as it is brought up online. The LMP performs the following functions: • Verifies link integrity by establishing bidirectional traffic forwarding, and rejects any unidirectional links • Exchanges periodic hellos to monitor and maintain the health of the links • Negotiates the version of StackWise Virtual header between the switches A = StackWise Discovery Protocol (SDP) Page 7 - https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.pdf

AnswerC: The Link Management Protocol (LMP) is activated on each link of the StackWise Virtual link as soon as it is brought up online. The LMP performs the following functions: ● Verifies link integrity by establishing bidirectional traffic forwarding, and rejects any unidirectional links ● Exchanges periodic hellos to monitor and maintain the health of the links

The Link Management Protocol (LMP) is activated on each link of the StackWise Virtual link as soon as it is brought up online. The LMP performs the following functions: • Verifies link integrity by establishing bidirectional traffic forwarding, and rejects any unidirectional links • Exchanges periodic hellos to monitor and maintain the health of the links • Negotiates the version of StackWise Virtual header between the switches

It's B! Explanation: In a Cisco StackWise Virtual (SV) domain, Link Management Protocol (LMP) plays a crucial role in managing the stack by checking hardware compatibility between switches that are intended to be part of the StackWise Virtual domain. LMP ensures that both switches can work together in a StackWise Virtual setup, confirming that they are running compatible software and hardware configurations before forming the domain. Why Other Options Are Incorrect: • A. It determines which switch becomes active or standby. This role is performed by the StackWise Virtual configuration, not by LMP specifically. • C. It rejects any unidirectional link traffic forwarding. This behavior is typically handled by the Bidirectional Forwarding Detection (BFD) protocol or other mechanisms, not by LMP. • D. It discovers the StackWise domain and brings up SVL interfaces. While LMP does play a role in managing links, the discovery of the StackWise Virtual domain and the setup of SVL interfaces involve additional configuration steps outside of LMP’s main role of compatibility checking.

C is correct A is SDP (wrong) B is SDP (wrong) C is LMP (correct) D is LMP but it´s used by (StackWise Virtual) for the SVL, (NOT StackWise) (wrong) LMP (Link Management Protocol) performs the following functions: - Verifies link integrity by establishing bidirectional traffic forwarding. (Unidirectional links are rejected). - Sends periodic hello messages to maintain the SVL. - Exchanges other required information. - It's used by StackWise Virtual for the SVL, StackWise Virtual Link. - It's used by VSS to bring up and maintain the VSL, Virtual Switch link SDP (StackWise Discovery Protocol) performs the following functions: - Determines if the hardware and software versions of the switches are compatible. - Determines the active switch and standby switch. source: Jermey´s IT Lab https://www.youtube.com/watch?v=1iqVk-MfXYU&list=PLxbwE86jKRgOb2uny1CYEzyRy_mc-lE39&index=18

The Link Management Protocol (LMP) is activated on each link of the SVL as soon as the links are established. LMP ensure the integrity of the links and monitors and maintains the health of the links.

D. It discovers the StackWise domain and brings up SVL interfaces. The Link Management Protocol (LMP) is responsible for the discovery and management of links within the StackWise Virtual domain. It facilitates the formation of the StackWise Virtual domain by discovering compatible switches and establishing communication links. Additionally, LMP is involved in bringing up StackWise Virtual Links (SVL interfaces) between the switches within the SV domain, enabling them to operate as a single logical unit.

"C" is correct ref https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.pdf Page 7 Figure 6 A. WRONG (SDP) It determines which switch becomes active or standby. B. WRONG (SDP) It determines if the hardware is compatible to form the StackWise Virtual domain. C. OK It rejects any unidirectional link traffic forwarding. D. WONRG ("Pre-parse configuration file") It discovers the StackWise domain and brings up SVL interfaces. The Link Management Protocol (LMP) is activated on each link of the StackWise Virtual link as soon as it is brought up online. The LMP performs the following functions: • Verifies link integrity by establishing bidirectional traffic forwarding, and rejects any unidirectional links

Ref: Troubleshoot SVL on Catalyst 9000 Switches - Cisco “… New LMP & SDP Counters … LMP - Link Management Protocol - L2 traffic to maintain the SVL. The link Management protocol is a software component, which runs a hello between ends and decides if the physical link is eligible to be part of the StackWise Virtual. LMP also monitors each configured physical link while they are part of the SVL. LMP is a part of the Network Interface Manager (Nif Mgr) software process. …” A. It determines which switch becomes active or standby. Wrong answer. B. It determines if the hardware is compatible to form the StackWise Virtual domain. Wrong answer. C. It rejects any unidirectional link traffic forwarding. Wrong answer. D. It discovers the StackWise domain and brings up SVL interfaces. Correct answer.

voting. provided answer is correct

Edit: C is correct

A and B are correct: "It ensures that the hardware and software versions are compatible to form the SVL and determines which switch becomes active or standby from a control plane perspective" https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ha/b_1612_ha_9600_cg/configuring_cisco_stackwise_virtual.html

it seams to be A The Link Management Protocol (LMP) is activated on each link of the SVL as soon as the links are established. LMP ensure the integrity of the links and monitors and maintains the health of the links. The redundancy role of each switch is resolved by the StackWise Discovery Protocol (SDP). It ensures that the hardware and software versions are compatible to form the SVL and determines which switch becomes active or standby from a control plane perspective. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ha/b_1612_ha_9600_cg/configuring_cisco_stackwise_virtual.html

i think thas the correcte answer is A