Adapters not failing over
If adapter failures are not triggering failovers and you are running AIX 5.2 with 5200-01 or earlier, check to see if your adapter card needs to have link polling enabled to detect link failure.
Some adapters cannot automatically detect their link status. To detect this condition, these adapters must enable a link polling mechanism that starts a timer that periodically verifies the status of the link. Link polling is disabled by default. For EtherChannel to work correctly with these adapters, however, the link polling mechanism must be enabled on each adapter before the EtherChannel is created. If you are running AIX 5L Version 5.2 with the 5200-03 Recommended Maintenance package and later, the link polling is started automatically and this cannot be an issue.
yes for the link polling to be enabled.
Before creating the EtherChannel, use the following command on every adapter
to be included in the channel: smitty chgenetyes and
press Enter.