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Single Point Setup
Single Point Setup Overview
Cisco Small Business WAP551 and WAP561 Wireless-N Access Point 154
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Single Point Setup Single- and Dual-Radio APs
A Single Point Setup can contain a mixture of dual-radio and single-radio APs.
When the configuration of a single-radio device in the cluster changes, the device
propagates the change to the first radio of all members. The configuration of the
second radio on any dual-radio APs in the cluster is not affected.
If a Single Point Setup contains only single-radio APs and a dual-radio device joins
the cluster, then only radio 1 on the dual-radio device is configured with the Single
Point Setup configuration. Radio 2 on the device remains as it was prior to joining
the cluster. However, if the Single Point Setup already has at least one dual-radio
device, then the second radio of the device joining the cluster is configured with
the cluster settings.
When a WAP device is enabled and configured for Single Point Setup, it begins
sending periodic advertisements every 10 seconds to announce its presence. If
there are other WAP devices that match the criteria for the cluster, arbitration
begins to determine which WAP device will distribute the master configuration to
the rest of the members of the cluster.
The following rules apply to Single Point Setup cluster formation and arbitration:
• For existing Single Point Setup clusters, whenever the administrator
updates the configuration of any member of the cluster, the configuration
change is propagated to all members of the cluster, and the configured
WAP device assumes control of the cluster.
• When two separate Single Point Setup clusters join into a single cluster,
then the latest modified cluster wins arbitration of the configuration and
overwrites and updates the configuration of all clustered WAP devices.
• If a WAP device in a cluster does not receive advertisements from a WAP
device for more than 60 seconds (for example, if the device loses
connectivity to other devices in the cluster), the device is removed from the
cluster.
• If a WAP device in Single Point Setup mode loses connectivity, it is not
immediately dropped from the cluster. If it regains connectivity and rejoins
the cluster without having been dropped, and configuration changes were
made to that device during the lost connectivity period, the changes are
propagated to the other cluster members when connectivity resumes.
• If a WAP device in a cluster loses connectivity, is dropped, later rejoins the
cluster, and configuration changes were made in the during the lost
connectivity period, the changes are propagated to the device when it
rejoins. If there are configuration changes in both the disconnected device
and the cluster, then the device with the greatest number of changes and,