Home > Ask the Data Center Experts > z/OS and OS/390 Questions & Answers > TCP/IP problem
Ask The Data Center Expert: Questions & Answers
EMAIL THIS

TCP/IP problem

Mark Zelden EXPERT RESPONSE FROM: Mark Zelden

Pose a Question
Other Data Center Categories
Meet all Data Center Experts
Become an Expert for this site


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   


>
QUESTION POSED ON: 22 April 2006
We're running z/OS Version 1.4.10 on a 2066-0A1 z/Series 800. I need to add two new ports to TCP/IP to be used for Cobol CICS Socket programming. The ports are 3010 & 3011. EZACICD has been modified to direct it to our Test CICS region named OKDPSTST. Port=3011. Problem is, when you use NETSTAT from TSO, it lists 3010 & 3011, but does not reflect that the system knows about an associate to the IP Address for the host port and its association to 3010 & 3011. It reflects 0.0.0.0 and not 172.xx.xx.xxx. What do I have to have modified and recycled in order for these associations to be completed? Thanks. New to z/OS Systems.

>
EXPERT RESPONSE

I'm not sure I understand the question well (part of that may be that I am not a "TCP/IP expert". How does it list those ports? As listening or established? It sounds like it is just listening which means it is just waiting for a connection. So perhaps your application is just not working or trying to use the port when you are using the NETSTAT command.

There are parms within TCP/IP that restrict port usage by range and parms that reserve ports for certain job names. However, it is not required to reserve the port to a particular job (but it is good practice). Those port assignments can be made in the "MVS" stack within the TCP/IP parms or from the Unix stack (/etc/services).

For more information, please see the various TCP/IP manuals on the z/OS Communications Server bookshelf: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/Shelves/F1A1BK5.


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   


RELATED CONTENT
z/OS and OS/390
Automating FTP transfers to AIX
Troubleshooting mainframe to Linux FTP
Is your z/OS problem a known vulnerability?
FTP help
Performance without high DASD usage
Ethernet-converted printers
Additional communication possibilities besides "dark fiber" and DWDM
Batch FTP
Lost GDG
Working with Telnet

RELATED RESOURCES
2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems
Search Bitpipe.com for the latest white papers and business webcasts
Whatis.com, the online computer dictionary



Search and Browse the Expert Answer Center
Search and browse more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
Browse our Expert Advice

HomeNewsTopicsITKnowledge ExchangeTipsBlogsMultimediaWhite PapersEvents
About Us  |  Contact Us  |  For Advertisers  |  For Business Partners  |  Site Index  |  RSS
SEARCH 
TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines.

TechTarget Corporate Web Site  |  Media Kits  |  Reprints  |  Site Map




All Rights Reserved, Copyright 2005 - 2008, TechTarget | Read our Privacy Policy
  TechTarget - The IT Media ROI Experts