38-11
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 38 Configuring EtherChannels and Link-State Tracking
Configuring EtherChannels
For more information about switch stacks, see Chapter 5, “Managing Switch Stacks.”
Configuring EtherChannels
These sections contain this configuration information:
• Default EtherChannel Configuration, page 38-11
• EtherChannel Configuration Guidelines, page 38-12
• Configuring Layer 2 EtherChannels, page 38-13 (required)
• Configuring Layer 3 EtherChannels, page 38-15 (required)
• Configuring EtherChannel Load-Balancing, page 38-18 (optional)
• Configuring the PAgP Learn Method and Priority, page 38-19 (optional)
• Configuring LACP Hot-Standby Ports, page 38-20 (optional)
Note Make sure that the ports are correctly configured. For more information, see the “EtherChannel
Configuration Guidelines” section on page 38-12.
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
Ta b l e 38-3 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 or stack MAC
ad
dress.
Load-balancing Load distribution on the switch is based on the
so
urce-MAC address of the incoming packet.
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