Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

13-88
Wireless Network Management
Network Self Healing
Network Self Healing
Self healing keeps your wireless network functioning optimally in response
to changing conditions. A radio in a self-healing network can automatically
change the properties of its RF network, which include:
■ channel
■ transmit power
■ supported rates
By managing this ability, the Wireless Edge Services xl Module provides two
basic services:
■ Neighbor recovery—When radios detect that a neighbor has failed, they
automatically adjust settings so that they can support as many of the
stations associated with the failed radio as possible.
■ Interference avoidance—Radios adjust their channel setting to avoid
interfering with neighboring radios.
Neighbor Recovery
When enabled on the Wireless Edge Services xl Module, neighbor recovery
can automatically configure radios to change their settings to compensate for
another radio’s failure.
Both the Wireless Edge Services xl Module and RP radios monitor for failed
radios. The RPs monitor neighbors by listening for beacons from RPs that they
have learned that they can hear on their channel.
Note Both single-channel detectors and dedicated detectors can monitor neighbors.
However, dedicated detectors monitor all channels instead of just one. For
this reason, it can be a good idea to configure one RP in a self-healing network
as a dedicated detector (depending, of course, on the total number of RPs).
A radio “fails” in any of these circumstances:
■ The module no longer recognizes the RP as adopted.
In other words, the module and the RP cannot communicate, whether due
to a physical or a logical problem.