IBM Support

MF51937 - LIC-COMM-TCPIP Memory leak on Token Ring lines

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC-COMM-TCPIP Memory leak on Token Ring lines


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
NONE



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
On Token Ring lines with active TCP/IP interfaces, temporary
storage is allocated periodically while checking the ARP
(Address Resolution Protocol) cache for duplicate IP addresses
and is not deallocated. The frequency of the check is based on
the ARP cache timeout in the TCP/IP attributes (CHGTCPA) and the
size of the storage is dependent on the number of ARP cache
entries (64 bytes for each entry).

CORRECTION FOR APAR MA40342 :
-----------------------------
This PTF prevents future leaks by deallocating the storage
allocated for the ARP cache check. To recover any storage leaked
prior to installing the PTF, TCP/IP must be restarted.

CIRCUMVENTION FOR APAR MA40342 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF51967      LIC-COMM-TCPIP-MSGTCP1B21 TCP/IP VIPA INTERFACE DOES NOT STA
   MF51853      OSP-UNPRED TCP/IP INTERFACE ON A TOKEN RING NETWORK STOPPED
   MF48863      TCPIP-ACT-UNPRED VIPA CONFIGURED PREFERRED INTERFACES ARE AC
   MF49331      LIC-COMM-TCPIP IFF_POINTOPOINT not set for IPv6 addresses
   MF48083      LIC-COMM-TCPIP IPv6 addresses not usable
   MF47858      LIC-COMM-TCPIP VL07000071 in ToIp6ND if DAD disabled for *IP

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA40342
Superseded by:......................View fix details for PTF MF60858
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C1116710


System i Support

IBM disclaims all warranties, whether express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. By furnishing this document, IBM grants no licenses to any related patents or copyrights. Copyright © 1996,1997,1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 IBM Corporation. Any trademarks and product or brand names referenced in this document are the property of their respective owners. Consult the Terms of use link for trademark information.

[{"Type":"MASTER","Line of Business":{"code":"LOB57","label":"Power"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SWG60","label":"IBM i"},"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.1.0"},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG15V","label":"PTF Cover Letters - OS\/400 General"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
22 December 2010