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Exam 200-301 topic 1 question 1046 discussion

Actual exam question from Cisco's 200-301

Question #: 1046
Topic #: 1

Refer to the exhibit. A network engineer updates the existing configuration on interface fastethernet1/1 switch SW1. It must establish an EtherChannel by using the same group designation with another vendor switch. Which configuration must be performed to complete the process?

A. interface port-channel 2
channel-group 2 mode desirable
B. interface fastethernet 1/1
channel-group 2 mode on
C. interface fastethernet 1/1
channel-group 2 mode active
D. interface port-channel 2
channel-group 2 mode auto

Show Suggested Answer

Suggested Answer: C 🗳️

by rAlexandre at Feb. 15, 2023, 8:18 p.m.

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rAlexandre

Highly Voted 1 year, 11 months ago

Selected Answer: C

C is the right awnser in order to change to LACP for multi vendor compatibility

upvoted 18 times

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j1mlawton

Highly Voted 1 year, 11 months ago

Selected Answer: C

C is correct LACP must be used

upvoted 8 times

rubzal

1 year, 8 months ago

PAGP mentioned in the exhibit

upvoted 5 times

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vaderz

Most Recent 1 year, 3 months ago

He updates configuration on the same interface. Got B for the first time but now I think it’s C. Got caught so many times with not reading or understanding question correctly.

upvoted 4 times

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Techpro30

1 year, 5 months ago

This is why I got out of cisco administration. After 25 years they could never have 1 standard... There are three options for configuring an EtherChannel: PAgP: A Cisco proprietary protocol LACP: An IEEE standard Manual: Bundle multiple physical interfaces without any protocol PAgP has two modes: Auto mode: The interface can respond to PAgP packet negotiation but will never start one on its own. Desirable mode: The interface actively attempts a negotiating state for PAgP packet negotiation. LACP has two modes: Active: The interface actively sends LACP packets in its attempt to form an LACP connection. Passive: The interface can respond to LACP negotiation but will never initiate on its own.

upvoted 5 times

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Shabeth

1 year, 7 months ago

Selected Answer: C

C is correct

upvoted 1 times

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shiv3003

1 year, 9 months ago

i go for A

upvoted 1 times

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Leethy

1 year, 9 months ago

Selected Answer: B

B. interface fastethernet 1/1 channel-group 2 mode on To establish an EtherChannel with another vendor switch, the configuration should be set to "mode on" for the interface. This means that the EtherChannel will be formed without using any specific negotiation protocol like PAgP (Cisco proprietary) or LACP (IEEE standard). The command for this would be: interface fastethernet 1/1 channel-group 2 mode on

upvoted 3 times

Vikramaditya_J

1 year, 5 months ago

When using the "mode on" configuration, the EtherChannel will be created "only" when another interface group is in EtherChannel "on" mode. However, one major drawback of using manually configured "On" EtherChannel Mode is that any layer one device like media converter or modem between two Etherchannel devices will not be able to diagnose link failure and keep on sending the traffic while PAgP/LACP configured devices will detect the failure and respond to it. The question also doesn't speak anything about such requirements. CCNA isn't an expert level exam and it doesn't ask such complicated questions. Answer is only B.

upvoted 2 times

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ac89l

1 year, 8 months ago

Configure Cross-Stack EtherChannel Without PAgP or LACP -> channel-group 1 mode on or Configure Cross-Stack EtherChannel with LACP -> channel-group 1 mode active/passive I would go for C

upvoted 2 times

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