Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) - Manual (Page 294)

280 Brocade Mobility RFS7000-GR Controller System Reference Guide
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Configuring switch redundancy & clustering
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• 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 that a new member has been introduced during a period when the redundancy group
is not operating with all its license contributing members.
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: