IBM Z Hardware and Operating Systems Ideas Portal


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Communications Server

Showing 445

DupAck - Input and Output Out-of-order packets

It was noticed an abnormal ammount of "Dup acks" in TCP connections. Since the two end points of those connections are inside a datacenter (no external links) it usually means there are lost packets.Some traces (SYSTCPDA and SYSTCPOT) were capture...
about 5 years ago in z/OS / Communications Server 1 Not under consideration

TCP/IP leaves the group EZBTCPCS with the message *EZZ9676E and It is not able to rejoin it again.

After a lack of ECSA in a member of a 4-way sysplex, TCP/IP leaves it with the message *EZZ9676E and It is not able to rejoin the XCF group again.Even when we have GLOBALCONFIG SYSPLEXMONITOR AUTOREJOIN options active and the problem that caused t...
over 10 years ago in z/OS / Communications Server 13 Not under consideration

TCPIP Sysplex Autonomics with CSM constrain

VTAM CSM FIXED Storage arise 80% CONSTRAIN situation due to a high demand of TCP workload with 4 OSA 10 Gb interfaces. But returns to a level under 80% immediately. This situation repeats more than 1000 times in 2 hours.TCPIP Sysplex Autonomics do...
almost 4 years ago in z/OS / Communications Server 2 Not under consideration

VTAM Connection Network Pending PU Processing

When a Connection Network PU goes into a pending state during connection establishment, VTAM does not perform any INOP Processing as it does for native Enterprise Extender connections. The pending PU remains in the pending state for an indefinite ...
about 4 years ago in z/OS / Communications Server 1 Not under consideration

Add DTLS Support for Enterprise Extender

We would like to see if DTLS could be added in Enterprise Extender so we could use SSL with UDP.
over 10 years ago in z/OS / Communications Server 3 Not under consideration

Send TCP/IP reply traffic over the same interface

Provide a way to force the TCP/IP Stack to send reply traffic over the same interface that the request came in on.
about 6 years ago in z/OS / Communications Server 1 Not under consideration

Allow IP Address binding for PORTRANGE statements

Currently it is only possible to use IP Address binding on PORT statements and not PORTRANGE statements. For a number of application (eg. DB2) where one Server listens on multiple ports that should only be accessed over a particular IP Address, cu...
4 months ago in z/OS / Communications Server 1 Not under consideration

Sysplex Distributor decisions monitoring

We consider to implement new settings of sysplex distributor for WAS and DDF workloads. According to manuals, in DISTRIBUTED mode it cooperates with WLM, which assigns weights to each DVIPA network address separately. https://www.ibm.com/support/k...
over 6 years ago in z/OS / Communications Server 2 Not under consideration

Increase VIPADIST limit to greater than 64 ports

I'd like to ask that the current limit of 64 ports per VIPADIST IP address be increased.
about 7 years ago in z/OS / Communications Server 1 Not under consideration

More robust wildcarding for Jobname and user id for Attls policies

We have an increasing number of applications using ATTLS. These applications have names that start with a variable but have the same ending. However the ATTLS policy only allows trailing Wild cards, not wildcards in the middle of the jobname.
almost 4 years ago in z/OS / Communications Server 2 Not under consideration

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