IBM 12.1(22)EA6 User Manual
24-8
Cisco Systems Intelligent Gigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
Chapter 24 Configuring EtherChannels and Layer 2 Trunk Failover
Configuring EtherChannels
Configuring EtherChannels
These sections describe how to configure EtherChannel interfaces:
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Note
Make sure that the interfaces are correctly configured (see the
Note
After you configure an EtherChannel, configuration changes applied to the port-channel interface apply
to all the physical interfaces assigned to the port-channel interface, and configuration changes applied
to the physical interface affect only the interface where you apply the configuration.
to all the physical interfaces assigned to the port-channel interface, and configuration changes applied
to the physical interface affect only the interface where you apply the configuration.
Default EtherChannel Configuration
shows the default EtherChannel configuration.
EtherChannel Configuration Guidelines
If improperly configured, some EtherChannel ports are automatically disabled to avoid network loops
and other problems. Follow these guidelines to avoid configuration problems:
and other problems. Follow these guidelines to avoid configuration problems:
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Configure an EtherChannel with up to eight Ethernet ports of the same type.
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Configure all ports in an EtherChannel to operate at the same speeds and duplex modes.
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Enable all interfaces in an EtherChannel. A port in an EtherChannel that is disabled by using the
shutdown interface configuration command is treated as a link failure, and its traffic is transferred
to one of the remaining interfaces in the EtherChannel.
shutdown interface configuration command is treated as a link failure, and its traffic is transferred
to one of the remaining interfaces in the EtherChannel.
Table 24-2
Default EtherChannel Configuration
Feature
Default Setting
Channel groups
None assigned.
PAgP mode
No default.
PAgP learn method
Aggregate-port learning on all interfaces.
PAgP priority
128 on all interfaces. (Changing this value has no effect.)
LACP learn method
Aggregate-port learning on all interfaces.
LACP priority
32768 on all interfaces.
Load balancing
Load distribution on the switch is based on the
source-MAC address of the incoming packet.
source-MAC address of the incoming packet.