MPROUTE Advertises Invalid Routes
APAR Identifier ...... PQ79971 Last Changed ........ 03/12/24
MPROUTE ADVERTISES INVALID ROUTES
Symptom ...... IN INCORROUT Status ........... CLOSED PER
Severity ................... 4 Date Closed ......... 03/11/19
Component .......... 5735FAL00 Duplicate of ........
Reported Release ......... 420 Fixed Release ............ 999
Component Name TCP/IP V2 FOR V Special Notice
Current Target Date .. Flags
SCP ...................
Platform ............
Status Detail: APARCLOSURE - APAR is being closed.
PE PTF List:
PTF List:
Release 3A0 : UQ82482 available 03/12/04 (0401 )
Release 420 : UQ82483 available 03/12/04 (1000 )
Release 430 : UQ82484 available 03/12/04 (1000 )
Release 440 : UQ82485 available 03/12/04 (0401 )
Parent APAR:
Child APAR list:
ERROR DESCRIPTION:
Customer reports that their z/OS MPROUTE server is issuing
messages that indicate the z/VM MPROUTE server is advertising
an invalid route:
EZZ7946I error in advertisement: typ 5 id 0.255.255.255 org
xx.xx.xx.xx
A trace of the z/VM MPROUTE server confirms that the bad
advertisement is originating from the z/VM MPROUTE server and
that the advertisement is in error.
LOCAL FIX:
PROBLEM SUMMARY:
****************************************************************
* USERS AFFECTED: All users of MPRoute. *
****************************************************************
* PROBLEM DESCRIPTION: MPROUTE is sending out incorrect *
* advertisements for 0.255.255.255 *
****************************************************************
* RECOMMENDATION: APPLY PTF *
****************************************************************
When static DEFAULT routes are coded in the GATEWAY statement,
the TCP/IP stack sends the routes to MPROUTE. The stack is
sending a destination of 0.0.0.0 and a subnetmask of 255.0.0.0.
The incorrect subnetmask is causing MPROUTE to send type 5
advertisements for a 0.255.255.255 route.
PROBLEM CONCLUSION:
TCP/IP has been changed to send a 0.0.0.0
subnetmask for DEFAULT routes.
TEMPORARY FIX:
COMMENTS:
MODULES/MACROS: TCIPDOW TCPARSE TCPIP
SRLS: NONE
RTN CODES:
CIRCUMVENTION:
MESSAGE TO SUBMITTER:
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