User's Manual

Advanced Configuration Features
53
Horizon Compact Release 1.01.01 Wireless Ethernet Product User Manual – Volume 1
in a hot stand-by state. When the DC signal is removed (as a result of the unit normally carrying traffic
failing), then the stand-by radio becomes active, and takes over the traffic. After a redundancy switch,
once the first system is able to return to carrying traffic, a manual switch is required, via a CLI command,
to return the system to its original state.
11.13.2 Two Wire Option
The “two wire” option is so named because two separate data feeds are required; one to each Horizon
system. One Horizon system is configured as the primary and the other as the secondary. Note that the
terms “primary” and “secondary” relate solely to the internal functions of the units and has no relationship
to which radio is in stand-by or which is carrying traffic. Management has to be via Port 2, so each
Horizon will be configured for out-of -band management and have its Port 2 connected to the overlay
management network.
Data re-routing, between the Horizon systems, is dependant upon a connected Ethernet switch. Ethernet
switch settings are used to reroute the traffic from one Horizon unit to the other, when a failure occurs.
Protocols such as RSTP, LACP and routing protocols are able to determine that the Horizon units have
switched from active to stand-by units, or vice-versa, and will reroute the data traffic through the active
link.
Figure 11-2 Redundancy Connections – 2 wire option – copper interface
NOTE: For clarity, the PonE power adapter and surge arrestor have been omitted from the
diagram. Both the Port 1 and Port 2 Ethernet connections and the power feed via Port 1 must be
protected from transients.