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Etherchannels

CCNA Etherchannels

QuestionAnswer
Major advantages of an etherchannel more bandwidth, if one link fails other links stay up
command to lists the channel group, port channel and ports in that channel group show etherchannel ## summary
If you run show etherchannel ## summary and see a D next to the Port channel it means what? channel is down
An I next to a port channel in the show etherchannel ## summary output means ? the interface is working independently from the port channel
This command lists the negotiation protocol used show etherchannel ###port-channel
channel-group commands for all physical interfaces must use the same channel-group number on the same switch (can be different on different switches) True
Configuring the etherchannel in auto or passive modes on both switches results in successful negotiation False
If a neighboring switch is using PAgP or LACP you should not use what keyword ON, doing so will result in only one switch using Etherchannel
New physical interfaces and neighbor switches must match Speed, Duplex, Operational access or trunking state (all access or all trunk), access VLAN for access ports, Native & allowed VLANs for trunks,
If settings are different on the neighbor switch where the Etherchannel link is operating what will happen? PortChannel interface is placed in err-disabled state (same for physical interfaces)
Industry standard protocol for Etherchannel negotiation. Ports can be configured in an active or passive state. Link Aggregation Control Protocol (LACP)
Cisco proprietary protocol for Etherchannel negotiation. Ports can be configured in an auto or desirable state. Port Aggregation Protocol (PAgP)
Command that statically adds the port into the channel channel-group # mode on
Command to enter config mode of the Port Channel interface port-channel #
Command that must be run on both the physical ports and the port channels to make them routable no switchport
Physical ports in the channel must use the same speed and duplex True
channel-group # mode {desirable | auto} is the command to configure an Etherchannel to negotiate using PAgP
channel-group # mode {active | passive} is the command to configure an Etherchannel to negotiate using LACP
Created by: Jjwtwo
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