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24-13
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
The switch supports address learning only on aggregate ports even though the physical-port keyword
is provided in the command-line interface (CLI). The pagp learn-method and the pagp port-priority
interface configuration command have no effect on the switch hardware.
Note You should not set the learn method to physical-port because the switch is an aggregate-learning
device.
If the link partner to the switch is a physical learner that has the channel-group interface configuration
command 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 link partner to the switch is a physical learner that has the channel-group interface configuration
command 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.
Configuring the LACP Port Priority
You can set the priority for each port in an EtherChannel that is configured for LACP by using the
lacp port-priority privileged EXEC command. The range is from 1 to 65535. Beginning in privileged
EXEC mode, follow these steps to configure the LACP port priority:
Configuring Hot Standby Ports
When enabled, LACP tries to configure the maximum number of LACP-compatible ports in a channel,
up to a maximum of 16 ports. Only eight LACP links can be active at one time. Any additional links are
put in a hot standby state. If one of the active links becomes inactive, a link that is in hot standby mode
becomes active in its place.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface for transmission, and enter interface configuration
mode.
Step 3
lacp port-priority priority-value Select the LACP port priority value.
For priority-value, the range is 1 to 65535. By default, the priority value is
32768. The lower the range, the more likely that the interface will be used
for LACP transmission.
Step 4
end Return to privileged EXEC mode.
Step 5
show running-config
or
show lacp channel-group-number
internal
Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.