Network Issues
4.3 Specifying a Preferred Transport
4.3 Specifying a Preferred Transport
During installation, the system manager can specify either transport, using logical names RTR_DNA_FIRST or RTR_TCP_FIRST. For example, in the RTR$STARTUP.COM file (found in SYS$STARTUP), the following line specifies DECnet as the default transport:
$ DEFINE/SYSTEM RTR_PREF_PROT RTR_DNA_FIRST
To set the default transport to TCP/IP, remove (comment out) this definition from RTR$STARTUP.COM and restart RTR. For the change to take immediate effect, you must undefine the old logical name before restarting RTR.
You can also change the above command in RTR$STARTUP.COM to the following:
$ DEFINE/SYSTEM RTR_PREF_PROT RTR_TCP_FIRST
When creating a facility using TCP/IP as the default, you can specify
dna.nodename to override TCP/IP and use DECnet for a specific link. Similarly, when using DECnet as the default, you can specify tcp.nodename to use TCP/IP for a specific link. If the wrong transport has been assigned to a link, you must trim all facilities to remove nodes using the link (use the TRIM FACILITY command) to remove the link, then add the nodes back into the facility specifying the correct transport.
To run the DECnet protocol exclusively, use the following definition for the RTR preferred protocol logical name:
$ DEFINE/SYSTEM RTR_PREF_PROT RTR_DNA_ONLY
For examples of this command syntax, see the section on Network Transports in the Reliable Transaction Router System Manager's Manual.
4.3.1 Supported Products
Network products supported are listed in the RTR Version 3 Software Product Description.
