MF58512 - LIC-COMM-TCPIP-LOOP SYSTEM HANG

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
TR   5770999  710  MF99008   00/00    0000



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

-------------------------------------------------
System locks up after just a couple of users get signed on.
MSD shows all processors running the same code - #toirhdl

CORRECTION FOR APAR 'MA43735' :
-------------------------------
When using proxy ARP for a Virtual IP address (VIPA) where the
VIPA is set as the associated local interface for the physical
interface addresses, packets sent with the VIPA as the source
address attempt to prefer routes bound to the VIPA's proxy agent
when selecting from duplicate routes. An error in this route
selection caused an infinite loop, which is now fixed.

CIRCUMVENTION FOR APAR 'MA43735' :
----------------------------------
Setting different route priorities for the duplicate routes will
prevent the loop.


Activation Instructions


None.




Special Instructions

None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
     NONE

Summary Information

System i Support