NET/MASTER Management Services (MS) System Management Guide

Regulating Intersystem Message Flows
Supporting Remote Operations
105744 Tandem Computers Incorporated 9–33
In Figure 9-6, a network consists of four nodes that are running NonStop
NET/MASTER MS.
Figure 9-6. Example Network
016
\NODEA
\NODED
\NODEC\NODEB
TERM1
The central node, \NODEA, has ISR flows to nodes \NODEB and \NODED. Node
\NODEC has a flow to both \NODEB and \NODED. \NODEA has the UNSOLICIT
option for all ISR flows set to NO. If the terminal, called TERM1, fails, the message
advising of the failure is logged to the activity log on \NODED. The message is not
sent to \NODEA because it is an unsolicited message. Therefore, \NODEA does not
know that the terminal failed.
Each message that is forwarded on each flow class carries information on its source
node and the adjacent node from which it arrived. ISR can send messages only to
adjacent nodes. INMC discards all outgoing messages that are targeted at the
following:
The adjacent node from which the message arrived
The node from which the message originated