MAN-REF-CASW Customization
Page
3
Overview
This section provides an overview of the procedures used to complete the customization of the NESi-
Gate-CA for use with Host-Based NetEx/IP products. This section is targeted to the end-user responsi-
ble for customization. The reader must be familiar with channel device and network addressing con-
cepts.
Configure NESiGate
There are three important addressing elements involved in delivering NetEx/IP channel data that is not
IP-aware, and transferring it over an IP network to the correct destination:
•
Device Number
•
GNA Address
•
IP Address
Device Number
The Device Number on the host and Device Index on the NESiGate channel board are numeric repre-
sentations of the same unique "device". On the Host operating system, a "Device Number" is defined as
a Unit Address on a Logical Control Unit (a physical control unit may consist of from 1-16 logical con-
trol units). The Physical Control Unit may be connected to a Port on an ESCON Director. Multiple
inbound Host channels may be connected to the ESCON Director and provide connectivity to the device
from multiple partitions (LPARs) across multiple hosts.
Similarly, on the NESiGate ESCON board, a "Device Index" is defined as a Unit Address on a Logical
Control Unit (up to 16 may exist). The Physical Control Unit may be connected to a Port on an ESCON
Director, which may provide connectivity to multiple LPARs across multiple hosts.
Since both the Device Number and Device Index represent the same unique device (from different per-
spectives), the same addressing components must be specified
exactly the same
in both definitions.
Failure to do so will prevent the NESiGate devices from functioning properly.
When defining devices on the ESCON channel board, the following items are specified: Device Unit
Address, Logical Control Unit, the Director port to which the host channel is connected, and Partition-id
(LPAR). The Device Index values are not specified by the user. They are automatically generated
when the channel configuration is defined.
A maximum of 64 devices are supported on each ESCON interface.
Refer to the “Channel Define Interface” button on page
14 for a description of defining the channel de-
vices.
Customization
