System information

124
AS/400 IBM Network Station: Techniques for Deployment in a WAN
4.5.1.3 Remote Boot Servers Provide All Functions
Remote boot servers are used to provide all functions (such as boot,
authentication, and so on) to the Network Station.
The advantages for this strategy are:
• Independent from central authentication servers (for example, if the link
goes down)
• Smaller bandwidth required
• Faster bootup
• Remote servers can be used to deploy other applications
The disadvantages for this strategy are:
• More hardware required
• More servers to deploy and manage
4.5.2 Centralized versus Distributed
If you have a distributed site model, it can appear as shown in Figure 34.
Figure 34. Distributed Model
In this example, you can see that each of the sites is connected by some kind
of WAN link that enables them to share information. Each of the sites is
independent having the applications, configuration and data locally. While this
usually brings a high level of availability, it also brings a high level of
management overhead, thus increasing the
total cost of ownership .
Distributed Model
Site A
Site B
Site C
Site D