EtherChannel and LACP Scenarios

Drag and drop the steps of LACP active/passive mode negotiation into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

Question 2mediummatching

Drag and drop each PAgP port mode on the left to its matching negotiation behavior on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

Sends PAgP packets to negotiate; Initiates PAgP negotiation; Forms EtherChannel with desirable or auto

Responds only to received PAgP packets; Does not initiate negotiation

Question 3mediummulti select

Which three statements about LACP (Link Aggregation Control Protocol) are true? (Choose three.)

A
LACP packets are exchanged using multicast destination MAC address 01-80-c2-00-00-02.
Correct because LACP uses the Slow Protocols multicast address 0180.c200.0002.
B
LACP can place up to 8 links in the active state and an additional 8 links in hot-standby mode.
Correct per IEEE 802.3ad, which allows up to 16 links total, with 8 active and 8 standby.
C
When using LACP, both sides must be configured with the same system priority to form a channel.
Why wrong: Incorrect because system priority is used to determine which side controls the channel; they do not need to match.
D
LACP automatically detects speed and duplex mismatches and prevents the channel from forming.
Correct because LACP verifies that all member links have compatible parameters (speed, duplex) before aggregating.
E
LACP operates only in Layer 3 mode and cannot be used for Layer 2 EtherChannels.
Why wrong: Incorrect because LACP works for both Layer 2 and Layer 3 EtherChannels.

Question 4mediummatching

Drag and drop each EtherChannel port state on the left to its matching description on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

Port is part of the channel and forwards traffic

Port is not part of the channel, operates as normal switchport

Port is disabled due to incompatible parameters

Port is in process of negotiation (LACP/PAgP)

Port has been added to the port-channel interface

Question 5hardmulti select

Which two statements about PAgP (Port Aggregation Protocol) are true? (Choose two.)

A
PAgP uses the multicast MAC address 01-00-0C-CC-CC-CC for its messages.
Correct because PAgP uses the Cisco-proprietary multicast address 0100.0CCC.CCCC.
B
PAgP supports up to 16 active links in a single EtherChannel.
Why wrong: Incorrect because PAgP supports a maximum of 8 active links, with no standby links.
C
PAgP can form a channel even if one side is configured in 'auto' mode and the other in 'desirable' mode.
Correct because 'desirable' actively initiates negotiation, and 'auto' responds, allowing channel formation.
D
PAgP uses the same packet format as LACP and can interoperate with LACP-enabled devices.
Why wrong: Incorrect because PAgP is Cisco proprietary and incompatible with the IEEE standard LACP.
E
PAgP requires both ends to be configured with identical port priorities to form the channel.
Why wrong: Incorrect because PAgP does not use port priority; it uses the port ID only for tie-breaking, but priorities do not need to match.

Question 6mediummatching

Drag and drop each EtherChannel protocol on the left to its matching vendor on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

IEEE standard, supported by multiple vendors

Cisco proprietary

Standard for LACP

Vendor that developed PAgP

Describes LACP

Question 7hardmatching

Drag and drop each EtherChannel load-balance method on the left to its matching hashing input on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

Source and destination IP addresses

Source and destination MAC addresses

Source and destination Layer 4 ports

Source IP address only

Destination IP address only

Question 8hardmulti select

Which three statements about EtherChannel configuration and verification are true? (Choose three.)

A
All member ports in an EtherChannel must have the same speed and duplex settings.
Correct because mismatched speed or duplex will prevent the channel from being established.
B
The 'channel-group 1 mode on' command enables LACP negotiation on the interface.
Why wrong: Incorrect because 'mode on' forces the channel without any negotiation protocol (neither LACP nor PAgP).
C
The command 'show etherchannel summary' displays the port-channel interface status and which member ports are bundled.
Correct because this command provides a concise view of the EtherChannel, including the 'SU' (Layer 2 up) and 'P' (bundled) flags.
D
If a member link is configured as a trunk but the port-channel interface is an access port, the channel will still form.
Why wrong: Incorrect because all member ports must have the same Layer 2 mode (all trunk or all access) to form a channel.
E
When using LACP, the 'lacp rate fast' command reduces the interval for sending LACPDUs from 30 seconds to 1 second.
Correct because fast rate sets the LACPDU interval to 1 second, speeding up convergence.

Question 9mediumdrag order

Drag and drop the steps of configuring a Layer 2 EtherChannel using PAgP into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

Question 10mediumdrag order

Drag and drop the steps of EtherChannel troubleshooting and verification steps into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

A
Check physical port status with 'show interfaces'
Correct first step: check physical port status with 'show interfaces' to identify down ports, errors, or speed/duplex mismatches.
B
Verify EtherChannel bundle with 'show etherchannel summary'
Correct second step: after verifying physical ports are up, use 'show etherchannel summary' to confirm the bundle is formed and member ports are in the correct state.
C
Inspect protocol details with 'show etherchannel detail'
Correct third step: 'show etherchannel detail' provides in-depth protocol-specific information to catch configuration mismatches.
D
Check load-balancing with 'show etherchannel load-balance'
Correct fourth step: 'show etherchannel load-balance' ensures the load-balancing algorithm is appropriate for the traffic pattern.
E
Test end-to-end connectivity with ping and traceroute
Correct final step: test end-to-end connectivity with ping and traceroute to validate that the EtherChannel is forwarding traffic correctly.

Question 11mediummatching

Drag and drop each EtherChannel port state on the left to its matching description on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

Port is actively forwarding traffic in the EtherChannel

Port is active but not part of any EtherChannel

Port is administratively down or error-disabled in the channel

A
bundled: Port is actively forwarding traffic in the EtherChannel
Correct: This describes a bundled port that actively forwards traffic.
B
stand-alone: Port is active but not part of any EtherChannel
Correct: This describes a stand-alone port that is active but not in a channel.
C
suspended: Port is administratively down or error-disabled in the channel
Correct: This describes a suspended port that is down or error-disabled.
D
bundled: Port is a member of the channel and forwarding
Why wrong: Incorrect: This is a duplicate of the bundled state. While the description is valid, only P1 is the intended match.
E
stand-alone: Port operates as a regular switch port
Why wrong: Incorrect: This is a duplicate of the stand-alone state. While the description is valid, only P2 is the intended match.

Question 12mediumdrag order

Drag and drop the steps of Layer 3 EtherChannel (routed port-channel) setup into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

Question 13hardmulti select

Which three statements about PAgP (Port Aggregation Protocol) are true? (Choose three.)

A
PAgP uses the multicast MAC address 01-00-0c-cc-cc-cc for its protocol frames.
Correct because PAgP uses the Cisco proprietary multicast address 01-00-0c-cc-cc-cc.
B
PAgP can negotiate an EtherChannel with a device that runs LACP in active mode.
Why wrong: Incorrect because PAgP and LACP are incompatible and cannot interoperate.
C
The PAgP modes 'desirable' and 'auto' will form an EtherChannel only if the neighbor is set to 'desirable' or 'auto'.
Why wrong: Incorrect because 'auto' will only form a channel with 'desirable', not with another 'auto'. 'Desirable' can form with 'desirable' or 'auto'.
D
PAgP supports up to 8 ports in a single EtherChannel, with no standby ports.
Correct because PAgP allows a maximum of 8 active ports and does not support the standby port feature that LACP offers.
E
PAgP can detect and report mismatched parameters such as speed and duplex between member ports.
Correct because PAgP performs parameter checking and will not form the channel if there are mismatches.

Question 14mediumdrag order