Configuring VTAM

BARR/NJE

For each Barr node, your host programmer must enter the following LU definitions in an existing PU definition. The host programmer must also create a logmode table entry and activate the VTAM PU. If you are using an HPR/IP (Enterprise Extender) connection, you must also configure TCP/IP and a VTAM major node definition.

If you are using a Barr SNA or SNA connection, you must configure VTAM. Configuring VTAM is not necessary for CTC connections.

See also:


Enter the LU macro for the NJE LU

Enter the following LU macro An instruction in a source language that points to a sequence of instructions in the same language to replace it. and add the following parameters to your PU definition.

 

PU

puname

ADDR=01,IDBLK=03D,DATMODE=FULL,IDNUM=12345,

X

 

 

MAXDATA=1033,MAXOUT=7,

X

 

 

PACING=7,VPACING=7,MODETAB=YOURMODT

 

luname

LU

LOCADDR=n,USSTAB=,DLOGMOD=BARRMOD

 

Parameter

Description

IDBLK=bbb
IDNUM=nnnnn

Use these parameters to identify the remote’s PU definition. During Xid negotiation, the remote sends an Exchange ID that contains the IDBLK and IDNUM parameters. VTAM searches for the PU identified by IDBLK and IDNUM and uses this PU for the rest of the communications session.

MAXDATA=265|521|1033|2057

The maximum amount of data you can send on the PU in one frame. This value includes nine bytes of header information plus the data length. The default value is 1033.

To maximize performance, you can increase throughput by sending larger frames of data. Send 1024 bytes by setting MAXDATA to 1033 in the VTAM PU definition and on the 802.2 Connection Configuration dialog box, HPR/IP Connection Configuration dialog box, or the SDLC Connection Configuration dialog box. This step reduces the amount of control information and total number of frames sent. Setting MAXDATA to 2057 can result in greater system throughput, but it is not recommended for Ethernet or other LAN equipment that will not support the larger packet size.

MODETAB=YOURMODT

Replace YOURMODT with your system's mode table.

luname

Enter the LU name for the NJE LU. This value must match the APPLID in JES2 or POWER configuration. This must also match the NJE LU name specified when configuring BARR/NJE for Barr SNA or SNA and the SNA gateway.

LOCADDR=n

Enter a valid local address from 1 to 255. This value must match the NJE LU number specified when configuring BARR/NJE for Barr SNA or SNA and the SNA gateway.

USSTAB=

The Barr NJE LU does not support SSCP Acronym for System Services Control Point. A controlling program in an SNA domain. It resides in the host and is a component within VTAM. message traffic. By specifying USSTAB= with no parameter, the traffic is not sent.

DLOGMOD=BARRMOD

Replace BARRMOD with the logmode table entry to use by default. This will match the LOGMODE parameter in the logmode table entry. See the following example.

Create a logmode table entry

Set pacing and max VTAM framesizes in the BARRMOD logmode table entry. Enter the following commands at your host console.

BARRMOD

MODEENT

LOGMODE=BARRMOD,FMPROF=X'03',TSPROF=X'03',

 

 

PRIPROT=X'72',SECPROT=X'72',COMPROT=X'4020',

 

 

RUSIZES=X'0000',PSERVIC=X'000000000000000000000000',

 

 

APPNCOS=#CONNECT,SRCVPAC=X'07',SSNDPAC=X'07',

 

 

PSNDPAC=X'07',TYPE=X'01',

Parameter

Description

LOGMODE=BARRMOD

The logmode entry name. Replace BARRMOD with the DLOGMOD value in the PU definition shown above. This is a required value.

FMPROF

The function management (FM) profile. This is a required value and will not change.

TSPROF

The transmission services profile. This is a required value that will not change.

PRIPROT

The FM primary LU protocols. This is a required value and will not change.

SECPROT

The FM secondary LU protocols. This is a required value and will not change.

COMPROT

The common LU protocols. This is a required value and will not change.

RUSIZES

The SNA frame size. Setting the RUSIZES entry to zeros allows VTAM to use the maximum size. This is a required value.

PSERVIC

The LU presentation services profile. This is a required value and will not change.

SRCVPAC

The secondary receive pacing count. This is a required value and will not change.

SSNDPAC

The secondary send pacing count. This is a required value and will not change.

PSNDPAC

The primary send pacing count. This is a required value and will not change.

TYPE

Indicates the bind is non-negotiable. This is a required value and will not change.

Activate the VTAM PU

Enter the following commands at your host console.

v net,inact,id=VTAMMEMBER
v net,act,id=VTAMMEMBER

Where VTAMMEMBER is the library member that contains the PU definition.