A fix is available
APAR status
Closed as program error.
Error description
An etherchannel in 802.3ad mode that also has a backup adapter plus address to ping set up will usually fail over to the backup adapter when one of the adapters is removed using DAM. Even if alternate MAC address is set and being used, the removal can often trigger a loss of connectivity longer than 3 seconds which results in the etherchannel failing over to the backup adapter. It has also been observed that a fail over to backup can occur when adding an adapter via DAM.
Local fix
Setting the AIX etherchannel timeout to short helps because it causes the switch to send LACP packets every second. Then the address to ping settings can be lengthened to 8 or 10 seconds and this tends to avoid the fail over to the backup but there is still packets being lost until the switch discovers the adapter has been removed.
Problem summary
An etherchannel in 802.3ad mode may cause disrupt in network communication when a port is removed from the aggregation using DAM.
Problem conclusion
Etherchannel driver is modified to avoid LACP re-negotiation when port under aggregation is removed.
Temporary fix
Comments
6100-08 - use AIX APAR IV53704 6100-09 - use AIX APAR IV60929 6100-09 - use AIX APAR IV60929 7100-02 - use AIX APAR IV64208 7100-03 - use AIX APAR IV60933 7100-04 - use AIX APAR IV60949
APAR Information
APAR number
IV64208
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2014-08-29
Closed date
2014-08-29
Last modified date
2016-05-10
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U865318
UP15/01/19 I 1000
PTF to Fileset Mapping
U865318 devices.common.IBM.ethernet.rte 7.1.2.20
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Document Information
Modified date:
10 May 2016