LOYTEC L-IP User Manual

L-IP User Manual 104 LOYTEC
Version 6.1 LOYTEC electronics GmbH
9 L-IP Redundant
9.1 Redundancy and Fault Detection in CEA-709.1 Networks
9.1.1 Reasons for Communication Failures
Figure 97 shows typical reasons for communication failures in CEA-709 networks:
1. Broken connection on the backbone: The router is not connected to the backbone
anymore. Therefore the nodes are unable to communicate with nodes in other segments
or the building management system (A).
2. Router device failure: The router device fails due to power failure or device failure.
Again the nodes are unable to communicate with nodes in other segments or the
building management system across the router (A,B).
Broken cable in segment (3)
Broken connection to
backbone (1)
Router device failure (2)
C
B
A
Node device
failure (4)
Figure 97: Typical reasons communication failures in CEA-709 networks.
3. Broken cable in the segment: The nodes cannot communicate across the point of
fracture. Thus, nodes behind the point of fracture cannot communicate with nodes
before the point of fracture (C) and with the router (B) and therefore with nodes in
other segments (A).

LOYTEC L-IP Specifications

General

Brand	LOYTEC
Model	L-IP
Category	Network Router
Language	English