56 TN3270 Server Commands
vrn
vrn
Use the vrn DLUR SAP configuration command to tell the SNA session switch which connection
network the internal adapter interface on the CIP card belongs to. Use the no form of this command
to remove a network name.
vrn vrn-name
no vrn
Syntax Description
Default
The adapter is not considered to be part of a connection network.
Command Mode
DLUR SAP configuration
Usage Guidelines
The vrn command is used to discover routes without having to configure all possible links.
A connection network is also known as a shared-access transport facility (SATF). This means, at the
MAC level, that all nodes in the network can reach each other using the same addressing scheme and
without requiring the services of SNA session routing. A bridged LAN (whether source-route or
transparent) is an example. Such a network is represented in the APPN topology as a kind of node,
termed a VRN.
To make use of this function, all APPN nodes must use the same VRN name for the SATF.
Refer to the VTAM operating system documentation for your host system for additional information
regarding the VTAM VNGROUP and VNNAME parameters on the PORT statement of an XCA
major node.
Several parameters in the DLUR configuration mode consist of fully qualified names, as defined by
the APPN architecture. Fully qualified names consist of two case-insensitive alphanumeric strings,
separated by a period. However, for compatibility with existing APPN products, including VTAM,
the characters “#” (pound), “@” (at), and “$” (dollar) are allowed in the fully qualified name strings.
Each string is from one to eight characters long; for example, RA12.NODM1PP. The portion of the
name before the period is the NETID and is shared between entities in the same logical network.
Example
The following command sets a VRN name for the TN3270 internal adapter on the CIP:
vrn SYD.BLAN25
Related Commands
adapter
lan
vrn-name
Fully qualified virtual routing node (VRN) name.
