OSI/MHS Configuration and Management Manual

Troubleshooting Your OSI/MHS Subsystem
OSI/MHS Configuration and Management Manual—424827-003
9-2
Interconnection Problems With Other MTAs
Configuration errors are of two major types:
•
Local errors, such as OSI/MHS-to-OSI/AS address mismatches. This type of error
involves MTA and MR group objects in OSI/MHS and ENTRY and PROCESS
objects in OSI/AS.
•
Interoperability or connection-oriented errors, such as incorrect passwords, invalid
protocols, or incorrect MTA names. This type of error involves the MTA object and
the information exchanged with the adjacent MTA.
Most MTA interconnection problems occur during association establishment, when
OSI/MHS initiates an association with an adjacent MTA or attempts to accept an
association request from an adjacent MTA. (An MTA that attempts to initiate an
association is the initiator; an MTA that receives and responds to association requests
is the responder.)
Association establishment involves interactions among many processes and is affected
by the definitions of various OSI/MHS objects and their attributes. Figure 9-1 and the
explanation that follows it explain how associations are established between MTAs and
how the configuration attributes are used in that context. The explanation is followed
by a summary of attributes and their roles in association establishment.
The numbers in the following list correspond to numbers in Figure 9-1. In this
example, both the initiator and the responder are OSI/MHS MTAs. A different MTA is
likely to behave slightly differently and have its own conventions for naming and
specifying configuration attributes. Understanding exactly how association
establishment occurs makes it easier to specify consistent address values on both
sides of a connection and to identify an error from evidence of when and where it
occurred.
1. A message arrives at MTA 1 and needs to be routed. There can be multiple
ROUTE objects specified for a given O/R name. The MR process that received
Figure 9-1. Association Establishment Between MTAs
040VST .VSD
MS
MRP
RTS
RUA
OSI/AS
OSI/TS
TLAM or X25AM
GIP
Proprietary
Messaging System
MTA
MTA 1
MTA 2
RTS
MRP
1
9
2
3
4
4
8
5
6
7
8
8
RS
LO
OSI/AS
OSI/TS
TLAM or X25AM