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IP address of TN3270 client served by CSL node not displayed on VTAM host

Technote (troubleshooting)


When displaying on VTAM the name of an LU associated with a TN3270 client served by a Communications Server for Linux (CSL) node, the display does not include the expected message IST1669I IPADDR..PORT ipaddr..portno.


The customer has done either or both of the following:

  • specified IPINFO=NONE as a start option on the VTAM host

  • disabled the sending of the TCP/IP Information Control Vector (CV X'64') by specifying NO_TCPIP_VECTOR on the ptf_flags parameter on the define_node command.

Consequently, VTAM suppresses display of message IST1669I.

Resolving the problem

  1. Enter the VTAM DISPLAY command D NET,VTAMOPTS,OPT=IPINFO to determine whether or not the VTAM start option IPINFO=NONE is coded. If IPINFO=NONE is coded, message IST1669I will be suppressed, and you should dynamically modify the IPINFO start option value by entering the VTAM command MODIFY NET,VTAMOPTS,IPINFO=DISPONLY. For more information, see the related IBM technote: How to control the saving, displaying, and propagation of IP information for TELNET 3270 clients.

  2. If IPINFO=NONE is not coded, or the problem persists after specifying IPINFO=DISPONLY, enable the sending of the TCP/IP Information vector to VTAM by removing NO_TCPIP_VECTOR from the ptf_flags parameter on the define_node command.

Cross reference information
Segment Product Component Platform Version Edition
Networking Communications Server for Linux Linux Red Hat - xSeries, Linux SUSE - xSeries, Linux xSeries, Linux Red Hat - pSeries, Linux SUSE - pSeries 6.2.1, 6.2.2, 6.2.3,,,, 6.4,,,,,
Networking Communications Server for Linux on zSeries Linux Red Hat - zSeries, Linux SUSE - zSeries, Linux zSeries 6.2.1, 6.2.2, 6.2.3,, 6.4,,,,,,

Document information

More support for: z/OS Communications Server

Software version: 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 2.1, 2.2

Operating system(s): z/OS

Software edition: All Editions

Reference #: 1377395

Modified date: 03 February 2014

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