APAR status
Closed as program error.
Error description
************************************************************** * USERS AFFECTED: * Systems running the AIX 7100-03 Technology Level * with devices.ethernet.lnc.rte at the 7.1.3.49 level, or * devices.ethernet.mlx.rte at the 7.1.3.49 level. ************************************************************** * ERROR DESCRIPTION: * In the latest SPs, for certain adapters, VLAN tagged * largesend packets are silently dropped in the AIX/VIOS * adapter layer. * * On all AIX and VIOS levels mentioned above, adapters using * the lncentdd driver are exposed. * On 7100-03-09, adapters using the mlxentdd driver are also * exposed. * * Find out if a system has any adapters using an affected * driver with lsdev, for example: * # lsdev -F "name ddins" | grep lncentdd * Note: on a VIOS, this must be run as root using * 'oem_setup_env'. ************************************************************** * RECOMMENDATION: * Install APAR IV95638. * Prior to fix availability, an interim fix is available from * either * ftp://aix.software.ibm.com/aix/ifixes/iv95638/ * https://aix.software.ibm.com/aix/ifixes/iv95638/ * Installation of the ifix requires a reboot. **************************************************************
Local fix
Disable largesend on the physical adapter: chdev -a large_send=no -l entX
Problem summary
The driver incorrectly calculates the packet header size for VLAN tagged largesend packets and therefore the packets are silently dropped
Problem conclusion
Correct the code to properly handle VLAN tagged largesend packets
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IV95638
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-05-02
Closed date
2017-05-15
Last modified date
2017-05-15
APAR is sysrouted FROM one or more of the following:
IV95372
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
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SG11R"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
Document Information
Modified date:
20 April 2022