5 - 46 WiNG 4.4 Switch System Reference Guide
• Do not allow different port speed/duplex settings on members. Each members should have the settings.
• In a redundancy group of three switches (S1, S2 and S3), if S1 has X licenses, S2 has Y licenses and S3 has Z licenses,
the license count is X+Y+Z (the aggregation of each switch).
• A cluster license is re-calculated whenever a new switch brings existing licenses to a group or an existing switch’s
license value changes (increases or decreases).
• A simple switch reboot will not initiate a new cluster license calculation, provided the re-booted switch does not come
up with different installed license.
• A change to an installed license during runtime initiates a cluster license calculation.
• If an existing redundancy group member goes down, it will not initiate a cluster license calculation.
• Whenever the cluster protocol is disabled, a member switch forgets the learned cluster license as well as peer
information needed to compute license totals.
• If the switch start-up configuration is removed, a member switch forgets the learned cluster license as well as peer
information needed to compute license totals.
• If adding a new switch (with zero or non-zero installed license) to a group with at least one license contributing switch
down, the new group member will receive a different cluster license value.
For example, for a cluster of three switches (S1 = 6, S2 = 6 and S3 = 6 licenses), the group license count is 18. If S1
goes down, the license count is still 18, since the license calculation is not initiated if a member switch goes down. If
S4 (with zero licenses) is introduced, S4 becomes part of the group (can exchange updates and other packets), but has
license count of 12 (NOT 18), even though S2 and S3 still show a license count of 18. This should be an indicator a new
member has been introduced during a period when the redundancy group is not operating with all its license
contributing members.
5.4.5 Managing Clustering Using the Web UI
Managing clustering in the Web UI is done through the
Cluster GUI
feature. The Cluster GUI feature updates many key
screens in the Web UI allowing you to see APs and MUs managed by all active members of a cluster.
To enable the Cluster GUI feature:
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