OSI/MHS Configuration and Management Manual

Planning Your OSI/MHS Subsystem
OSI/MHS Configuration and Management Manual—424827-003
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What Are Your Network Planning Considerations?
•
What communication networks will you use? (X.25? LAN? TCP/IP over one or
both of these?)
•
What are the expected message rates and sizes? OSI/MHS supports messages
up to 10 MB for relay to an adjacent MTA, for delivery to a general user gateway,
and for delivery to or submission by a local user agent. It supports messages up to
2 MB for delivery to a Transfer gateway and for delivery to or submission by a
remote user agent.
•
What are your organizational and geographic requirements? (Will your system
span several countries? Will you have several domains?)
Once you assess your business requirements, you can begin to map them to the
planning considerations described in this section.
What Are Your Network Planning
Considerations?
The first item to consider is whether you are adding to an existing network or creating a
new network. If you are adding to an existing X.400 network, then you may be
dependent on the characteristics of that particular network If you are creating a new
X.400 network, then you may be able to design to suit your needs.
Some other network planning issues to consider are:
•
What is the topology of the network?
•
What type of network connectivity is available? (X.25? LAN? TCP/IP over one or
both of these? What are the line speeds?)
•
How many concurrent associations will your system need to handle? How many
for each interface? (What is the total for all MTAs and all UAs?)
•
How would you like messages to be routed in the subsystem and in the network?
Further network-planning issues are described in the following discussions of how you
plan to use the subsystem and how to determine route-selection criteria.
How Do You Want to Use the OSI/MHS
Subsystem?
Next, you must determine how you want to use OSI/MHS in your X.400 network. You
can use the subsystem in several ways:
•
To send, receive, or relay messages to and from MTAs connected to your
subsystem
•
To send and receive messages to and from the HP Transfer subsystem
•
As a message store for use by a UA