Visara CNA-8000 Installation - Manual (Page 101)

CNA-8000 Installation and Configuration
707158-003 9-1
Chapter 9. Host Circuit Definition
Configuring XCA Host Circuits
When running the TN3270 Server option on the CNA-8000, Host Circuits must be
defined to interact with VTAM as PU type 2 nodes. Each Host Circuit must have a
corresponding PU2 Switched Node definition in VTAM, identified by a configured PUID
that must match the IDBLK and IDNUM values within the VTAM PU2 definition.
Corresponding LU definitions in VTAM are used to support the TN3270 display and
printer sessions associated with the Host Circuit. Host Circuits should be defined prior to
defining the TN3270 client connectivity.
Each Host Circuit appears to VTAM as if it were connected through a LAN adapter on
the CNA-8000. This is only an illusion, since the Host Circuit actually resides within the
server. To complete the illusion, each Host Circuit must have a virtual MAC address and
SAP assigned to it so that VTAM can direct data traffic to it. The virtual LAN location
can be assigned to any of the configured XCA Network Interfaces. (At least one of the
network adapters needs to be configured as an XCA Network Interface to support this
feature.)
To define a Host Circuit on the CNA-8000 you will need to select the [XCA Host
Circuit] button on the Connectivity Configuration panel.