Campbell CR200 Manuel de l'opérateur Page 148

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Section 14. PakBus Overview
Routers are measurement or telecommunications devices that route packets
to other linked routers or leaf nodes.
Routers can be branch routers. Branch routers only know as neighbors
central routers, routers in route to central routers, and routers one level
outward in the network.
Routers can be central routers. Central routers know the entire network. A
PC running LoggerNet is typically a central router.
Routers can be router-capable dataloggers or communications devices.
The CR200(X) is always a leaf node. It cannot be configured as a router. The
network shown in FIGURE. PakBus Network Addressing (p. 134) contains 6
routers and 8 leaf nodes.
Figure 49: PakBus Network Addressing.
LoggerNet is configured by default as a router and can route datalogger to
datalogger communications.
14.3 Router and Leaf Node Configuration
14.4 Linking Nodes: Neighbor Discovery
To form a network, nodes must establish links with neighbors (adjacent nodes).
Links are established through a process called discovery. Discovery occurs when
nodes exchange hellos. A hello exchange occurs during a hello-message
between two nodes.
134
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