PK12577 is a cumulative APAR fix and includes the following fixes:
PQ14954 - Msg Pool Full Problems.
PQ29813 - cs2tcr00 Traps If There Is Not Enough Space in the CB Pool.
PQ36070 - TCP/IP Rem Does Not Clean Up Stream File Properly.
PQ48022 - TCP/IP REM Connection Reuse Problems.
PQ53958 - CS2TCR00 Will Not Stop During Its Initialization.
PQ65558 - On CS/6000 TCP/IP Errors Are Incorrectly Base Logged.
PQ66786 - Baselog CSR1202"TCP/IP Error On Function Socket Close,RC=9".
PQ67243 - Allow Sending > 64K (w/out DT Templates) To Unlike Platforms (NT/AIX, NO OS/2).
PQ67583 - Local CCB Suddenly Purged.
PQ36484 - CS/6000 cs2tcr00 Updates CACB Active Conn Count Incorrectly.
PQ79287 - Netbios Sends Oversized Message Resulting In CSR1011 (TCP/IP also).
PQ82219 - CS2TCR00 Traps Processing Error on NT.
PQ93324 - TCP/IP Leaks CCBSTOPPED Msgs In Message Pool
PQ94828 - TCP/IP Socket Rec/Send Buffer Size Incorrect
* PK12577 - CS2TCR00 Traps Traversing Bad ICCB Chain
* New in this cumulative APAR fix.