33-10
Catalyst 3750 Switch Software Configuration Guide
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Chapter 33 Configuring EtherChannels
Configuring EtherChannels
Configuring EtherChannels
These sections describe how to configure EtherChannel on Layer 2 and Layer 3 ports:
• Default EtherChannel Configuration, page 33-10
• EtherChannel Configuration Guidelines, page 33-11
• Configuring Layer 2 EtherChannels, page 33-12 (required)
• Configuring Layer 3 EtherChannels, page 33-15 (required)
• Configuring EtherChannel Load Balancing, page 33-18 (optional)
• Configuring the PAgP Learn Method and Priority, page 33-19 (optional)
• Configuring LACP Hot-Standby Ports, page 33-20 (optional)
Note Make sure that the ports are correctly configured. For more information, see the “EtherChannel
Configuration Guidelines” section on page 33-11.
Note After you configure an EtherChannel, configuration changes applied to the port-channel interface apply
to all the physical ports assigned to the port-channel interface, and configuration changes applied to the
physical port affect only the port where you apply the configuration.
Default EtherChannel Configuration
Table 33-3 shows the default EtherChannel configuration.
Table 33-3 Default EtherChannel Configuration
Feature Default Setting
Channel groups None assigned.
Port-channel logical interface None defined.
PAgP mode No default.
PAgP learn method Aggregate-port learning on all ports.
PAgP priority 128 on all ports.
LACP mode No default.
LACP learn method Aggregate-port learning on all ports.
LACP port priority 32768 on all ports.
LACP system priority 32768.
LACP system ID LACP system priority and the switch MAC address.
Load balancing Load distribution on the switch is based on the
source-MAC address of the incoming packet.
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