Figure 1 shows a multiple domain
XCA configuration.
To be in session across the XCA connection, application
programs in each VTAM® must
be compatible application programs (that is, they must both be SNA
applications programs).
To define the configuration in
Figure 1, define the following in the VTAM connected through the IBM® 3172 Nways Interconnect Controller:
- One external communication adapter major node to represent the
physical unit in the IBM 3172
Nways Interconnect Controller. This physical unit is used for network
management purposes. If you are running the NetView® program, it is recommended that you
code this definition statement. By defining this physical unit, you
can have the IBM 3172 Nways
Interconnect Controller forward the same type of information that
a 3174 cluster controller forwards. For example, any alerts detected
by the IBM 3172 Nways Interconnect
Controller would be forwarded.
- One external communication adapter major node for each LAN connected
to the IBM 3172 Nways Interconnect
Controller.
- Major nodes for any devices connected to the LAN.
Figure 1. XCA multiple domain configuration
Following is an example of coding used for the configuration
in Figure 1 (VTAM attached through the 3172 Nways Interconnect Controller):
- Define an external communication adapter major node to represent
the physical unit in the IBM 3172 Nways Interconnect Controller:
XCACON1 VBUILD TYPE=XCA XCA MAJOR NODE
PORT1 PORT MEDIUM=BOXMGR, 3172 MANAGER
CUADDR=500 CHANNEL UNIT ADDRESS
*
GROUP1 GROUP ISTATUS=ACTIVE ACTIVATED AT GEN
LINE1 LINE
PU1 PU
- Define another external communication adapter major node for the
token ring:
XCACON2 VBUILD TYPE=XCA XCA MAJOR NODE
PORT2 PORT MEDIUM=RING, TOKEN-RING
SAPADDR=4, SERVICE ACCESS POINT ADDRESS
ADAPNO=1, ADAPTER NUMBER
CUADDR=BC0 CHANNEL UNIT ADDRESS
*
GROUP2A GROUP DIAL=YES, SWITCHED PERIPHERAL NODE
ANSWER=ON, DIAL WILL ACCEPT CALLS
CALL=INOUT, DIAL IN AND OUT
ISTATUS=ACTIVE ACTIVATED AT GEN
LINE2A LINE ANSWER=ON PU CAN DIAL IN
PU2A PU
*
GROUP2B GROUP DIAL=NO NCP SUBAREA
ISTATUS=ACTIVE ACTIVATED AT GEN
LINE2B LINE
PU2B PU MACADDR=400007777757, LAN MEDIUM ACCESS CONTROL ADDRESS
PUTYPE=4, NCP PU
SAPADDR=8, SERVICE ACCESS POINT ADDRESS
SUBAREA=22, NCP'S SUBAREA NUMBER
TGN=1 TRANSMISSION GROUP NUMBER
- Define a switched major node for the peripheral node attached
to the LAN:
SWNODE1 VBUILD TYPE=SWNET
PU2 PU DISCNT=YES, DISCONNECT FACILITY
DYNLU=YES, DYNAMIC DEFINITION OF ILU (CDRSC)
IDBLK=002, BLOCK IDENTIFICATION
IDNUM=000002 IDENTIFICATION NUMBER
PUTYPE=2 PHYSICAL UNIT TYPE
*
LANPATH2 PATH DIALNO=0104000069010C59, TIC, SAP, MACADDR
GRPNM=GROUP2A LOGICAL GROUP DEFINITION
LU2 LU LOCADDR=2, DEPENDENT LU
ISTATUS=INACTIVE INITIAL STATUS INACTIVE
Notes: - You need to code one LINE and PU definition statement in the dial
GROUP definition statement for every simultaneous peripheral node
connection.
- Switched devices connected to a LAN are defined to VTAM using the model major node. See Defining resources dynamically.
- Multiple VTAM hosts can
be in session with different stations on the LAN through one IBM 3172 Nways Interconnect Controller.
To implement this support, code a different SAPADDR and MACADDR value
combination to distinguish between the two hosts.