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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Failover Roles

If the stack master fails (for example, is powered off), it is removed from the stack topology.

The standby unit detects the loss of peering communication and takes ownership of the stack management, switching from the standby role to the master role. The distributed forwarding tables are retained during the failover, as is the stack MAC address. The lack of a standby unit triggers an election within the remaining units for a standby role.

After the former master switch recovers, despite having a higher priority or MAC address, it does not recover its master role but instead takes the next available role.

To view failover details, use the show redundancy command.

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