Interchange node start option list

An interchange node combines the function of a subarea node and a network node. It resides on the border of an APPN network and a subarea network. It provides protocol conversion between subarea and APPN networks to enable the integration of APPN and subarea networks. For more information about interchange nodes, see the z/OS Communications Server: SNA Network Implementation Guide.

Following is the start list for A01. The combination of NODETYPE=NN and HOSTSA=01, as shown, defines this node as an interchange node. CPCP=YES enables this node for CP-CP sessions with all adjacent APPN nodes.

NETID, SSCPID, and SSCPNAME are required start options. HOSTPU is not required; however, it is recommended if you are using NetView®. The CONFIG start option identifies a unique name of the configuration list to be activated when VTAM® starts.

The CINDXSIZ start option specifies the maximum size of the CID and CONVID index tables. The new default value is 8176 bytes.

DYNLU=YES enables dynamic definition of independent LUs by using CDRSC definitions.

AUTHLEN=YES means that VTAM will forward the transmission priority specified from one LEN node to another LEN node.

AUTORTRY specifies whether adjacent node activation will cause a retry of pending automatic logon requests and, if it does, what kinds of adjacent nodes will cause such retries upon activation. AUTORTRY=AUTOCAP (the default value) specifies that such requests are retried only when an adjacent CDRM or an adjacent CP that supports automatic logon is activated.

The AUTOTI start option allows you to specify how often pending automatic logon requests owned by this host are retried. AUTOTI=0 (the default value) specifies that such requests are not retried periodically.

The BN start option specifies whether this node is to provide extended border node function. BN=NO (the default value) specifies that it does not provide this function. The BN start option is meaningful only for nodes that specify NODETYPE=NN.

The start option CDSERVR=NO specifies that this network node will not be a central directory server. NO is the default value.

The start option CDSREFER=3 specifies that this network node refers only to the three closest (minimal weight route) central directory servers in the network. For more information about the CDSREFER start option, see the z/OS Communications Server: SNA Resource Definition Reference.

The DISCNTIM start option specifies the amount of time that VTAM delays deactivation of the SSCP-PU session when there are no outstanding LU-LU session requests. This option is valid only for PU types 2 and 2.1 that have DISCNT=DELAY specified on the PU definition statement. DISCNTIM=15 (the default value) specifies this amount of time as 15 seconds. You can change the value of DISCNTIM with the MODIFY VTAMOPTS command while VTAM is running.

DYNADJCP=YES specifies that ADJCP minor nodes will be created as needed and placed in the ISTADJCP major node. This option defaults to YES.

The start option INITDB specifies whether the directory services and topology and routing services databases are loaded when VTAM is started. INITDB=ALL (the default value) specifies that both databases are loaded at that time. The INITDB start option is meaningful only if the NODETYPE=NN start option is also specified.

ENHADDR=YES specifies that VTAM can assign element addresses greater than 65 535 for PLUs.

The HPR start option specifies the level of HPR support provided by VTAM. HPR=ANR indicates that this VTAM network node provides ANR-level HPR support, meaning that it can be an intermediate node on an HPR route, but it cannot be the endpoint of an HPR route. ANR is the default HPR value for VTAM network nodes that also specify HOSTSA.

NQNMODE=NQNAME indicates that VTAM defines cross-network resources by their network-qualified names only.

The ROUTERES (routing resistance) start option is used to specify the relative desirability for this node to perform the intermediate session routing function. The value specified must be in the range 0-255. The lower the value, the more desirable it is to have this node provide intermediate session routing. Therefore, ROUTERES=1 indicates that it is highly desirable to have A02 provide this function.

The SORDER start option controls the order in which the APPN and subarea networks are searched when a search request for an unknown LU is received at this node from the subarea network. SORDER=APPN (the default value) specifies that the APPN network is to be searched first. The user can specify that the subarea network is to be searched first (SORDER=SUBAREA).

The SWNORDER start option specifies the way VTAM locates a switched PU. SWNORDER=CPNAME (the default value) specifies that VTAM searches for a switched PU by the CPNAME first and then, if not yet found, by the station identifier (IDBLK and IDNUM operands on the PU definition statement for the switched major nodes).

The VERIFYCP start option is used to specify whether VTAM is to perform LU-LU session-level verification during activation of LU 6.2 sessions involving control points. VERIFYCP=NONE specifies that no verification of the partner LU's identity is to take place during session activation.

The VFYRED start option specifies whether the node should attempt to perform resource verification reduction. VFYRED=YES indicates that LU 6.2 session initiation requests do not need to be delivered to the target LU. Using the VFYRED start option might allow you to significantly reduce directed verification searches. For more information about the VFYRED start option, see the z/OS Communications Server: SNA Network Implementation Guide and the z/OS Communications Server: SNA Resource Definition Reference.

The VFYREDTI start option specifies the amount of time resource verification reduction is to be performed before the resource's location is verified. VFYREDTI=8H specifies that resource verification reduction is to be performed for 8 hours. For more information about the VFYREDTI start option, see the z/OS Communications Server: SNA Network Implementation Guide and the z/OS Communications Server: SNA Resource Definition Reference.

The VRTG start option indicates whether VR-based transmission group connections are to be activated when SSCP-SSCP sessions are established for this node. This option is valid only for interchange nodes and migration data hosts. VRTG=YES indicates that such connections are activated when SSCP-SSCP sessions are established. You can change the value of VRTG with the MODIFY VTAMOPTS command while VTAM is running.

The VRTGCPCP start option indicates whether CP-CP sessions are supported over the VR-based transmission group. This option is meaningful only for interchange nodes and migration data hosts that also specify VRTG=YES. VRTGCPCP=YES (the default value) indicates that CP-CP sessions are supported over VR-based transmission groups.

*  =====> BEGINNING OF DATA SET ATCSTR01
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*   ATCSTR01 - VTAM START LIST FOR AN ICN NODE - A01                 *
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         AUTHLEN=YES,           ** AUTHORIZE LEN PRIORITY            **X
         AUTORTRY=AUTOCAP,                                           **X
         AUTOTI=0,                                                   **X
         BN=NO,                 ** NO EXTENDED BORDER NODE FUNCTION  **X
         CDSERVR=NO,            ** NOT A CENTRAL DIRECTORY SERVER    **X
         CDSREFER=3,            ** CENTRAL DIRECTORY SERVER SELECTION**X
         CINDXSIZ=8176,         ** CIT & CONVT INDEX TABLE SIZE      **X
         CONFIG=01,             ** MAJOR NODE ACTIVATION CONFIG LIST **X
         CPCP=YES,              ** CP-CP SESSION CAPABLE             **X
         DISCNTIM=15,           ** SSCP-PU DEACTIVATION DELAY        **X
         DYNADJCP=YES,          ** DYNAMIC ADJACENT CP (DEFAULT)     **X
         DYNLU=YES,             ** DYNAMIC LU                        **X
         ENHADDR=YES,           ** CAN USE HIGH ORDER ELEMENT ADDRESS**X
         HOSTPU=A01NPU,         ** HOST SUBAREA PU NETWORK NAME      **X
         HOSTSA=01,             ** UNIQUE SUBAREA ADDRESS            **X
         HPR=ANR,               ** ANR-LEVEL HPR SUPPORT             **X
         INITDB=ALL,            ** BOTH DS AND TRS DATABASES LOADED  **X
         MSGLEVEL=V4R1,         ** MESSAGES                          **X
         NETID=NETA,            ** HOST NETWORK IDENTIFIER           **X
         NODETYPE=NN,           ** ICN NETWORK NODE                  **X
         NQNMODE=NQNAME,        ** FULLY QUALIFIED NAMES USED        **X
         ROUTERES=1,            ** ROUTING RESISTANCE                **X
         SORDER=APPN,           ** APPN NETWORK SEARCHED FIRST       **X
         SSCPID=01,             ** UNIQUE SSCP IDENTIFIER            **X
         SSCPNAME=A01N,         ** GATEWAY SSCP NAME                 **X
         SWNORDER=CPNAME,       ** SWITCHED PU SEARCH ORDER          **X
         VFYRED=YES,            ** LU 6.2 VERIFICATION REDUCTION     **X
         VFYREDTI=8H,           ** VERIFICATION REDUCTION TIMER      **X
         VRTG=YES,              ** VR-BASED TG SUPPORTED             **X
         VRTGCPCP=YES,          ** CP-CP SESSIONS OVER VRTG LINKS    **X
         VERIFYCP=NONE          ** VERIFY CP (DEFAULT)               **
*  =====> END OF DATA SET ATCSTR01