TCPTYPE parameter

Type of TCP/IP server address space

Summary

Default value

UNKNOWN

Parameter type

System

Where set

User 0 CCAIN parameters

Related products

All

Introduced

Before Sirius Mods 6.7

Description

This parameter specifies the type of TCP/IP network to which Model 204 is connected. Generally, you can leave this parameter at its default value and let Janus automatically detect the type of TCP/IP you have on your machine.

If you specify type IBM or IBMV6, Janus detects and sets the type of IBM interface it will use, as shown in the table below.

You can also override auto-detection by explicitly supplying a TCPTYPE parameter value. The only reason to do this would be if you have multiple TCP/IP stacks installed and you want to force use of the non-preferred stack.

The valid TCPTYPE values are in the third column below:

Operating system	Network version	Value	Meaning
z/OS	IPV4 only	IBM	Auto-detect the "best" IBM TCP/IP interface. For z/OS, this is BPX. For CMS, this is IUCV.
		BPX	IBM BPX (Unix System Services).
		HPNS	IBM HPNS (High Performance Native Sockets). Note that despite its name, HPNS's performance is not nearly as good as BPX's.
		INTERLNK	InterLink TCP/IP.
		IUCV	IBM TCP/IP IUCV (Inter User Communication Vehicle).
	IPV6 only	IBMV6	Auto-detect the "best" IBM TCP/IP interface. For z/OS, this is BPXV6. For CMS, this is IUCVV6. This option is available as of version 7.7 of Model 204.
		BPXV6	IBM BPX (Unix System Services). This option is available as of version 7.7 of Model 204.
CMS	IPV4 only	IUCV	IBM TCP/IP IUCV (Inter User Communication Vehicle).
	IPV6 only	IUCVV6	IBM TCP/IP IUCV (Inter User Communication Vehicle). This option is available as of version 7.7 of Model 204.
z/VSE	IPV4 only	CSI	Connectivity Systems TCP/IP.

Most of the communication with the TCP/IP address space is accomplished with a Pseudo subtask (PST). Because of this, you may need to increase the NSUBTKS parameter by 1 before using Janus.