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Note that auto-synchronization always occurs during configuration updates that affect the
cluster, but the processing time is usually negligible. The auto-synch progress bar is
displayed only for longer-than-usual wait times.
Cluster recovery
In cases where the access points in a cluster become out of sync for any of the reasons
mentioned in “Known problems” on page 172, or an access point cannot join or be
removed from a cluster, the following methods for cluster recovery are recommended.
Reboot or reset access point
These recovery methods are given in the order you should try them. In all but the last
case (stop clustering), you only need to reset or reboot the particular access point whose
configuration is out of sync with other cluster members or cannot remove/join cluster.
■ Reboot the access point from its Administration UI. To do this, go to
http://IPAddressOfAccessPoint, navigate to
Advanced > Reboot and click Reboot. (IP
addresses for APs are on the
Cluster > Access Points
page for cluster members.)
■ Physically reboot the access point by pressing the Power button on the device.
■ Reset the access point from its Administration UI. To do this, go to
http://IPAddressOfAccessPoint, navigate to
Advanced > Reset Configuration, and click Reset.
(IP addresses for APs are on the
Cluster > Access Points
page for any cluster member.)
■ Physically reset the access point by pressing the Reset button on the device.
■ In some extreme cases, reboot or reset may not solve the problem. In these cases, follow
the procedure described the next section.
Stop clustering and reset each access point in the cluster
If the previous reboot or reset methods do not solve the problem, do the following to stop
clustering and reset all APs.
To stop clustering and reset each access point in the cluster:
1 Stop clustering on each access point in the cluster by entering the Stop Clustering
URL in the address bar of your Web browser as follows:
http://IPAddressOfAccessPoint/stop_clustering.cgi
Where IPAddres0sOfAccessPoint is the IP address of the access point you want to
stop clustering. You can find the IP addresses for the cluster members on the
Cluster > Access Points page for any of the clustered access points. We recommend
making a note of all IP addresses at this point.