56 TN3270 Server Commands
vrn
vrn
Use thevrn DLUR SAP configuration command to tell the SNA session switch which connection
networkthe internal adapter interface on the CIP card belongs to. Use the no form of this command
to remove a network name.
vrnvrn-name
novrn
Syntax Description
Default
The adapter is not considered to be part of a connection network.
Command Mode
DLUR SAP configuration
Usage Guidelines
Thevrn command is used to discover routes without having to configure all possible links.
Aconnection network is also known as a shared-access transport facility (SATF). This means, at the
MAClevel, 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.
Referto 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.
Severalparameters in the DLUR configuration mode consist of fully qualified names, as defined by
theAPPN architecture. Fully qualified names consist of two case-insensitive alphanumeric strings,
separatedby a period. However, for compatibility with existing APPN products, including VTAM,
thecharacters “#” (pound), “@” (at), and “$” (dollar) are allowed in the fully qualified name strings.
Eachstring 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.