Brocade Communications Systems RFS6000 System Reference Manual page 23

Self Healing
Self Healing is the ability to dynamically adjust the RF network by modifying transmit power and/or
supported rates upon an AP failure.
In a typical RF network deployment, APs are configured for Transmit Power below their maximum
level. This allows the Tx Power to be increased when there is a need to increase coverage when an
AP fails.
When an AP fails, the Tx Power/Supported rates of APs neighboring the failed AP are adjusted. The
Tx power is increased and/or Supported rates are decreased. When the failed AP becomes
operational again, Neighbor AP's Tx Power/Supported rates are brought back to the levels before
the self healing operation changed them.
The switch detects an AP failure when:
•
•
Configure 0 (Zero) or more APs to act as either:
•
•
•
Detector APs
Configure an AP in either – Data mode (the regular mode) or Detector mode.
In Detector mode, an AP scans all channels at a configurable rate and forwards received beacons
the switch. The switch uses the information to establish a receive signal strength baseline over a
period of time and initiates self-healing procedures (if necessary).
Neighbor Configuration
Neighbor detect is a mechanism allowing an AP to detect its neighbors as well as their signal
strength. This enables you to verify your installation and configure it for self-healing when an AP
fails.
Self Healing Actions
If AP1 detects AP2 and AP3 as its neighbors, you can assign failure actions to AP2 and AP3
whenever AP1 fails.
Assign up to four self healing actions:
1. No action
2. Decrease supported rates
3. Increase Tx power
4. Both 2 and 3.
Brocade Mobility RFS4000, RFS6000, and RFS7000 System Reference Guide
53-1002515-01
AP stops sending heartbeats.
AP beacons are no longer being sent. This is determined when other detector APs are no longer
hearing beacons from a particular AP.
Detector APs — Detector APs scan all channels and send beacons to the switch which uses the
information for self-healing.
Neighbor APs — When an AP fails, neighbor APs assist in self healing.
Self Healing Actions — When an AP fails, actions are taken on the neighbor APs to do
self-healing.
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