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Port Channels

Introduction​

Port Channels are a network configuration concept that allows network administrators to aggregate multiple physical network interfaces into a single logical interface. This aggregation increases bandwidth, redundancy, and load balancing capabilities for network connections. This cheat sheet serves as a quick reference for configuring Port Channels on Cisco devices.

Configuration Steps​

Creating Port Channels​

Use the following commands to create Port Channels:

Switch# configure terminal
Switch(config)# interface Port-channel {PORT_CHANNEL_NUMBER}
Switch(config-if)# description {DESCRIPTION}
Switch(config-if)# end
Switch# write memory

Adding Physical Interfaces to a Port Channel​

To add physical interfaces to a Port Channel, use the following commands:

Switch# configure terminal
Switch(config)# interface {INTERFACE_TYPE} {INTERFACE_NUMBER}
Switch(config-if)# channel-group {PORT_CHANNEL_NUMBER} mode {MODE}
Switch(config-if)# end
Switch# write memory

Commands​

Enter Configuration Mode​

To enter global configuration mode for making Port Channel configuration changes, use:

Switch# configure terminal

Create a Port Channel​

To create a Port Channel on a Cisco device, use this command:

Switch(config)# interface Port-channel {PORT_CHANNEL_NUMBER}

View Port Channel Information​

To view information about a Port Channel, use the following command:

Switch# show interface Port-channel {PORT_CHANNEL_NUMBER}

Exit Configuration Mode​

To exit configuration mode and return to privileged EXEC mode, run:

Switch(config-if)# end

Save Configuration Changes​

To save the changes made to the configuration, use the following command:

Switch# write memory