Motorola WiNG 4.4, Reference Manual, Page: 315 / 598

Switch Services 5 - 35
After sending the command to other members, the cluster-management protocol (at WS1) waits for a response from the
members of the redundancy group. Upon receiving a response from each member, WS1 updates the user’s screen and
allows the user to enter/execute the next command.
The wait time required to collect responses from other switches is predefined, so if any one or more members does not
respond to a given command within the defined interval, the command originating switch displays whatever responses
have been collected and ignores the delayed responses. This time-based response mechanism eliminates the possibility
of indefinite response hangs and allows for quicker redundancy group configuration.
There is no fixed master-slave relationship between members. Typically, a switch can be considered a master for the
command it originates. Responding members can be considered slaves with respect to that command.
This virtual master-slave relationship makes this design unique when compared to existing centralized management
systems. Having a virtual master-slave relationship eliminates a single point of failure, since a user can make use of any
switch as the group centralized management entity (using the cluster-management context).
To view status and membership data and define a redundancy group configuration, refer to the following:
• Configuring Redundancy Settings
• Reviewing Redundancy Status
• Configuring Redundancy Group Membership
• Redundancy Group License Aggregation Rules
• Managing Clustering Using the Web UI
5.4.1 Configuring Redundancy Settings
To configure switch redundancy:
NOTE: When using the redundancy feature make sure that UDP traffic on port 51515 is
open between the redundant switches.