92 IBM Communications Server for AIX, V6: New Features and Implementation Scenarios
Remote node type Network node, end node, or discover.
Remote IP host name To configure a selective link station enter the IP
hostname or dotted-decimal IP address of the
remote station.
Advanced parameters In most cases you can use the default settings
for these parameters, so you do not need to alter
the settings in the advanced dialog.
d. Click the OK button and the link station will appear beneath the port to
which it belongs in the Connectivity pane of the Node window.
Note that Enterprise Extender links support only independent LU traffic. That
means that if dependent LUs must be supported, DLUR must be configured
on the CS/AIX node.
6.4 Scenario
For this section we used the following equipment:
Two RS/6000s running AIX Version 4.3.3.0 with the latest maintenance
level, and
Communications Server for AIX, Version 6
A PC running Windows NT and IBM Personal Communications for
Windows NT
,
Version 4.3 (PCOMM)
A host running CS for OS/390
We used DLUR to show that Enterprise Extender provides a mechanism for
transporting SNA protocols over the IP network.
DLUR is an APPN feature that allows dependent LU sessions without a direct
connection to a host. The Dependent LU Requester (DLUR) communicates
with a Dependent LU Server (DLUS) over an APPN network. DLUR must be
available on the node where the LUs are located but DLUR is not required on
any intermediate nodes in the session route.
By using HPR/IP links, the session route between DLUR and DLUS will take
place in an IP network but taking advantage of APPN features such as HPR.
Sessions between DLUR and DLUS will be routed over an RTP connection.
The following configuration steps are required for this scenario:
1. Configure EE support on the rs60003 machine including DLUR
2. Configure EE support on the rs60004 machine
3. Activate CS/AIX resources on both nodes
Chapter 6. Enterprise Extender 93
4. Configure EE support in VTAM and TCP/IP on the host
5. Test the EE connections using PCOMM
The test scenario is shown in Figure 58. Refer to this figure when reviewing
the following configuration steps.
Figure 58. Test scenario
6.4.1 Configure the rs60003 machine
On the rs60003 machine:
1. Configure the node as an End Node, as shown in Figure 59.
OSA
PCOMM
TN3270 Client
Network Node
DLUR
TN3270 Server
CS for OS/390
NN DLUS
EE - IP VIPA
USIBMRA.RA03M
172.16.250.3
End Node
rs60004
9.24.104.27
rs60003
9.24.104.23
mk23bk63p
9.24.104.205
IP
IP
IP
EE
EE
94 IBM Communications Server for AIX, V6: New Features and Implementation Scenarios
Figure 59. Configuration of rs60003 EN
2. Define a DLUR PU. Click Services -> Connectivity -> New DLUR PU.
Figure 60. Definition of DLUR PU
The DLUR PU ID that you enter here must match the ID by which the PU is
defined within the VTAM configuration.
For assistance configuring the DLUR PU refer to
IBM Communications
Server for AIX Quick Beginnings, Version 6,
GC31-8583 and
IBM
Communications Server for AIX Administration Guide, Version 6,
SC31-8586.
3. Define the Dependent LUs
Chapter 6. Enterprise Extender 95
Figure 61. Definition of dependent LUs
For assistance configuring Dependent LUs refer to
IBM Communications
Server for AIX Quick Beginnings, Version 6,
SC31-8583 and
IBM
Communications Server for AIX Administration Guide, Version 6,
SC31-8586.
4. Configure the TN3270 server access records. Click Services -> TN
Server -> TN Server...
96 IBM Communications Server for AIX, V6: New Features and Implementation Scenarios
Figure 62. TN3270 server access
The LU Pool assigned for access by the TN3270 client contains the
dependent LUs defined to DLUR. Port 9000 was chosen as the TN Server
port.
For more information on TN3270 refer to
IBM Communications Server for AIX
Quick Beginnings, Version 6,
GC31-8583 and
IBM Communications Server
for AIX Administration Guide, Version 6,
SC31-8586.
5. Configure HPR/IP connectivity to the rs60004 NN as shown in Figure 56
on page 90 and Figure 57 on page 91.
The definition of the port adds the following define_ip_dlc and
define_ip_port sections to the /etc/sna/sna_node.cfg file:
[define_ip_dlc]
dlc_name =
IP0
description = ““
initially_active =
NO
udp_port_llc = 12000
udp_port_network = 12001

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