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Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBMBladeCenter, Software Configuration Guide
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Chapter24 Configuring EtherChannels and Layer2 Trunk Failover
Configuring EtherChannels
Beginning in privileged EXEC mode, follow these steps to configure EtherChannel load balancing:
To return EtherChannel load balancing to the default configuration, use the no port-channel
load-balance global configuration command.
Configuring the PAgP Learn Method and Priority
Network devices are classified as PAgP physical learners or aggregate-port learners. A device is a
physical learner if it learns addresses by physical ports and directs transmissi ons based on that
knowledge. A device is an aggregate-port learner if it learns addresses by aggregate ports.
For compatibility with Catalyst 1900 series switches, configure the switch for source-MAC load
distribution.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 port-channel load-balance method Configure an EtherChannel load-balancing method value:
•src-mac—Load distribution using the source-MAC address.
•dst-mac—Load distribution using the destination-MAC
address.
•src-dst-mac—Load distribution is based on the XOR of the
source-MAC address and destination MAC address.
•src-ip—Load distribution is based on the source-host IP
address.
•dst-ip—Load distribution is based on the destination-host IP
address.
•src-dst-ip—Load distribution is based on the XOR of the
source-IP address and destination-IP address.
The default is src-mac.
If the link partner to the switch is a physical learner, use one of
these load-distribution methods:
•If the channel-group interface configuration command is
set to auto or desirable, the switch automatically uses the
load distribution method based on the source-MAC address,
regardless of the configured load-distribution method.
•If the channel-group interface configuration command is
set to on, set the load-distribution method based on the
source-MAC address by using the port-channel
load-balance src-mac global configuration command.
Step3 end Return to privileged EXEC mode.
Step4 show etherchannel load-balance Verify your entries.
Step5 copy running-config startup-config (Optional) Save your entries in the configuration file.