What command is used to display EtherChannel information on a switch?

The correct command to display EtherChannel information on a switch is “show etherchannel summary.” This command provides a comprehensive overview of the EtherChannel configurations and statuses, showing which interfaces are bundled together, their operational state, and any potential misconfigurations. It presents details such as the EtherChannel group number, whether the group is active, and the protocol being used (like LACP or PAgP).

In contrast, the command that shows interfaces provides general status and configuration information for all interfaces but does not specifically focus on the EtherChannel. The command for VLANs displays information related to Virtual Local Area Networks, not EtherChannel configurations. Lastly, the command for IP routes provides routing table information and addresses, which is unrelated to the aggregation of switch ports utilized in EtherChannel configurations. Therefore, the "show etherchannel summary" command is specifically tailored to give a clear picture of the EtherChannel setup.