Introduction
Concentrator
Concentrator
LAN
Bridge/Router
A
B
C
Network 9000 Chassis
Midplane Ethernet
Segments
External LAN
Sales
Accounting
Manufacturing
Concentrator
Terminal
Server
WAN
Bridge/Router
External WANs
Figure 1-4. Midplane Ethernet Segment Configuration 2
Figure 1-4 shows that the terminal server connects to midplane Ethernet segment A and the
Ethernet link of the WAN Bridge/Router connects to midplane Ethernet Segment B. The
external connections of the WAN Bridge/Router provide access to remote networks.
The Link Map
The combination of links on a Network 9000 product to either midplane Ethernet segments
or external networks is called a link map. Each Network 9000 product has a default link
map which also supports optional connections. Chapter 3 describes the default link map of
managed concentrators, terminal servers, LAN bridge/routers, and WAN bridge/routers
in detail.
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