In this case, a single device in the cluster is used to route all traffic while the other device is used only in the event of a failure. When a failure occurs, the backup device becomes master and controls all forwarding.
Figure 61: Active/Passive Chassis Cluster Scenario
An active/passive chassis cluster can be achieved by using redundant Ethernet interfaces reth0 and reth1. If any of the interfaces in a reth fails, the group is declared inactive and all its interfaces fail over to the other group. This configuration minimizes the traffic over the fabric link because only one node in the cluster will forward traffic at any given time.
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