Done EtherChannel Flashcards
Which PAgP mode combination prevents an EtherChannel from forming?
A. auto/desirable
B. desirable/desirable
C. desirable/auto
D. auto/auto
D. auto/auto
Auto just listens for PAgP and never tries to initiate an EtherChannel negotiation, and thats why you can’t have both sides as Auto.
Refer to the exhibit. After an engineer configures an EtherChannel between switch SW1 and switch SW2, this error message is logged on switch SW2:
SW2#
09:45:32: %PM-4-ERR_DISABLE: channel-misconfig error detected on Gi0/0, putting Gi0/0 in err-disable state
09:45:32: %PM-4-ERR_DISABLE: channel-misconfig error detected on Gi0/1, putting Gi0/1 in err-disable state
Based on the output from switch SW1 and the log message received on switch SW2, what action should the engineer take to resolve this issue?
A. Configure the same protocol on the EtherChannel on switch SW1 and SW2.
B. Define the correct port members on the EtherChannel on switch SW1.
C. Correct the configuration error on Interface Gi0/0 on switch SW1.
D. Correct the configuration error on Interface Gi0/1 on switch SW1.
B. Define the correct port members on the EtherChannel on switch SW1.
Refer to the exhibit. An engineer is configuring an EtherChannel between Switch1 and Switch2 and notices the console message on Switch2. Based on the output, which action resolves this issue?
A. Configure more member ports on Switch1.
B. Configure less member ports on Switch2.
C. Configure the same port channel interface number on both switches.
D. Configure the same EtherChannel protocol on both switches.
D. Configure the same EtherChannel protocol on both switches.
Refer to the exhibit. The administrator troubleshoots an EtherChannel that keeps moving to err-disabled. Which two actions must be taken to resolve the issue?
(Choose two.)
A. Ensure that the corresponding port channel interface on the neighbor switch is named Port-channel1.
B. Ensure that the switchport parameters of Port-channel1 match the parameters of the port channel on the neighbor switch.
C. Ensure that interfaces Gi1/0/2 and Gi1/0/3 connect to the same neighboring switch.
D. Reload the switch to force EtherChannel renegotiation.
E. Ensure that the neighbor interfaces of Gi1/0/2 and Gi1/0/3 are configured as members of the same EtherChannel.
B. Ensure that the switchport parameters of Port-channel1 match the parameters of the port channel on the neighbor switch.
E. Ensure that the neighbor interfaces of Gi1/0/2 and Gi1/0/3 are configured as members of the same EtherChannel.
b and e or b and c. needs to be checked
Refer to the exhibit. After unsuccessfully configuring an EtherChannel link, an engineer enables debugging. Which action will resolve the issue?
A. Configure the EtherChannel members in desirable mode.
B. Set the EtherChannel to mode on.
C. Set the EtherChannel to mode active.
D. Configure the EtherChannel members in passive mode.
A. Configure the EtherChannel members in desirable mode.
im sure A is right because
if you look this log message , you see the PAgP , means the misconfigurations in PAgP configuration , in result you ignore the options that is talking about LAcP + static
B - on (static)
C - active (LAcP)
D - passive (LAcp)
Refer to the exhibit. Traffic is not passing between SW1 and SW2. Which action fixes the issue?
A. Configure switch port mode to ISL on S2
B. Configure LACP mode on S1 to active
C. Configure PAgP mode on S1 to desirable
D. Configure LACP mode on S1 to passive
C. Configure PAgP mode on S1 to desirable
On: no negotiation
PagP: auto, desirable
LACP: active, passive
Which of the following are valid Port Aggregation Protocol (PAgP) modes? (Choose two.)
A. On
B. Active
C. Passive
D. Auto
E. Desirable
D. Auto
E. Desirable
Modes PaGP: Auto and Desirable
LACP: Active and Passive
On: Forced
Refer to the exhibit. Communication between London and New York is down. Which command set must be applied to the NewYork switch to resolve the issue?
A.
NewYork(config)#no interface po1
NewYork(config)#interface range fa0/1-2
NewYork(config-if)#channel-group 1 mode negotiate NewYork(config-if)#end NewYork#
B.
NewYork(config)#no interface po1
NewYork(config)#interface range fa0/1-2
NewYork(config-if)#channel-group 1 mode on
NewYork(config-if)#end NewYork#
C.
NewYork(config)#no interface po1
NewYork(config)#interface range fa0/1-2
NewYork(config-if)#channel-group 1 mode passive
NewYork(config-if)#end
NewYork#
D.
NewYork(config)#no interface po1
NewYork(config)#interface range fa0/1-2
NewYork(config-if)#channel-group 1 mode auto
NewYork(config-if)#end
NewYork#
C.
NewYork(config)#no interface po1
NewYork(config)#interface range fa0/1-2
NewYork(config-if)#channel-group 1 mode passive
NewYork(config-if)#end
NewYork#
LACP Port Negotiation
1) Active - Passive
2) Active - Active
3) ON - ON
Refer to the exhibit. An engineer attempts to bundle interface Gi0/0 into the port channel, but it does not function as expected. Which action resolves the issue?
A. Enable fast LACP PDUs on interface Gi0/0.
B. Set LACP max-bundle to 2 on interface Port-channel1.
C. Configure no shutdown on interface Gi0/0.
D. Configure channel-group 1 mode active on interface Gi0/0.
B. Set LACP max-bundle to 2 on interface Port-channel1.
B is correct
Hot-Standby (hot-sby): It´s already configured and synchronized with the LACP group but remains in standby mode because the LACP group has reached its maximum number of active ports.
If one of the active ports goes down, the hot-standby port can quickly transition to an active state, minimizing downtime and ensuring continued data flow.
Since the interface Gi0/0 is in hot-sby mode, we need to set LACP Max-Bundle to 2, this increases the number of active ports allowed in the port channel to 2.
