24.2 Message Forwarding
Message forwarding is very common within the OVO environment. See Figure 24-1. When there are many managed nodes perhaps in different buildings, regions, or countries, a message flow plan becomes extremely important. Things to consider include:- What messages will the node forward to the server?
- What messages will the OVOW forward to OVOU?
- What messages will OVOU servers forward?
 These considerations are important because the message flow causes a higher load on the network. Take a careful look at the traffic on the network before, during, and after the implementation of OpenView. These network metrics and other requirements (such as message suppression) will guide the decisions about what messages will flow into the server's OV database.The message forwarding configuration concept was described in Chapter 19, "Enterprise Management Flexibility with Multiple Servers." Refer to the OpenView Concepts Guide for more information.24.2.1 Message Forwarding Rules
In general, message forwarding is a flexible configuration, allowing messages to pass from one system to another. However, as you might expect, there are a few restrictions. The message forwarding rules are described with scenarios in this section for reference. Refer to Figure 24-1.- Windows managed nodes A and B send messages to their respective primary managers, as shown in the diagram by the vertical lines from the nodes to the servers.
- Upon switch-control (using the tool SwitchMgmtServer), managed node A sends messages to OVOU, the new primary manager (per instructions in a MultipleActionManager policy) as shown by the diagonal line from node A to OVOU.
- Upon switch-control (using the tool SwitchMgmtServer), managed node B sends messages to OVOW, the new primary manager (per instructions in a MultipleActionManagers policy)
- Messages from OVOW managed nodes can be forwarded to the OVOU server (this is done by defining a message forwarding rule within a policy).
- Messages from an OVOW server that are forwarded to an OVOU server can be forwarded from there to another OVOU server. This is shown in the illustration by the one-way arrow from the OVOW manager to the OVOU manager. Then the vertical arrow leads to a third system, which is another OVOU manager.
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