A fix is available
APAR status
Closed as program error.
Error description
OMPROUTE OSPF routes are not being learned if TCPIP is started before VTAM is initialized. The device is active, however, no OSPF traffic is received over the interface. This can occur as result of a timing problem where the multicast capable flag is not set on the device when Omproute is informed that the device is active. Keywords: ping timeout ospf routes multicast Verification steps: SYSTCPIP Ctrace with options LCS,VTAM,IOCTL will show that the response to the SendQIPAsst command is being received AFTER the response from the SendStartLAN and SendLANSTATS commands.
Local fix
Start VTAM before TCPIP.
Problem summary
**************************************************************** * USERS AFFECTED: All users of the IBM Communications Server * * for z/OS Version 1 Release 6, 7, 8 & 9 IP: * * OSA devices in LCS mode * **************************************************************** * PROBLEM DESCRIPTION: A timing condition exists where an LCS * * mode OSA may be activated before the * * multicast capability has been * * determined. As a result, the device * * may start without multicast capability. * * Any application depending on multicast * * capability may fail to function. * **************************************************************** * RECOMMENDATION: * **************************************************************** An OSA device in LCS mode is currently activated once the StartLAN and LANStats commands have completed. However, multicast capability is determined only after a separate command, QIPAsst, has completed. Normally QIPAsst completes before the other commands that activate the OSA. However, there is currently no guarantee of the order in which the commands complete. As a result, a timing window exists where an OSA device in LCS mode may be activated before the device's multicast capability has been determined. The timing window is more likely to occur when VTAM is started after TCPIP. A device activated before multicast capability has been determined is assumed to be multicast incapable. Any application depending on multicasting will fail to work on the multicast incapable devices. If the application involved is a routing daemon such as omproute, then no dynamic routes will be learned. +-------------------------------------------------------------+ + Please check our Communications Server for OS/390 homepages + + for common networking tips and fixes. The URL for these + + homepages can be found in Informational APAR II11334. + +-------------------------------------------------------------+
Problem conclusion
Module EZBIFIND has been amended to to change the order of the LANStats, QIPAsst, and StartLAN commands. QIPAsst is now issued first and is immediately followed by LANStats. The StartLAN command is only issued once a response for LANStats has been received. The QIPAsst command should complete by the time the StartLAN command is sent and a response to it is received. * Cross Reference between External and Internal Names
Temporary fix
Comments
APAR Information
APAR number
PK55520
Reported component name
TCP/IP V3 MVS
Reported component ID
5655HAL00
Reported release
160
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-10-26
Closed date
2007-12-06
Last modified date
2008-02-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK31973 UK31974 UK31975 UK31976
Modules/Macros
EZBIFIND
Fix information
Fixed component name
TCP/IP V3 MVS
Fixed component ID
5655HAL00
Applicable component levels
R160 PSY UK31973
UP08/01/23 P F801
R170 PSY UK31974
UP08/01/23 P F801
R180 PSY UK31975
UP08/01/23 P F801
R190 PSY UK31976
UP08/01/23 P F801
Fix is available
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Document Information
Modified date:
02 February 2008