The command output for redundancy group: 1 shows that node1 is primary and node0 is secondary. The primary node for a redundancy group is the one that actively processes and controls traffic for the resources within that group. Therefore, Node 1 is controlling traffic for redundancy group 1.

The output also shows both nodes as Active (indicated by the (A)), which signifies they are healthy and operational. An operational failure would typically result in a different state (e.g., failed, ineligible). The reversal of primaryship for RG1, while the control plane (RG0) remains primary on Node 0 and both nodes are healthy, is the characteristic result of an administrative (manual) failover.

A. Redundancy group 1 experienced an operational failure.

An operational failure is not indicated, as both nodes are shown in a healthy Active state.

C. Node 0 is controlling traffic for redundancy group 1.

The output explicitly lists node0 as secondary for redundancy group 1; the primary node (Node 1) controls the traffic.

1. Juniper Networks TechLibrary

"Understanding Chassis Cluster Redundancy Groups": This document states

"The node on which the redundancy group is primary is the one that processes traffic for that redundancy group." This confirms that the primary node controls traffic

supporting option D and refuting C.

2. Juniper Networks TechLibrary

"show chassis cluster status | Junos OS": The command reference explains the output fields. The primary status indicates the node is active for the redundancy group. The healthy state shown in the exhibit

combined with the reversed primaryship

points away from an automatic failure-based failover.

3. Juniper Networks TechLibrary

"request chassis cluster failover | Junos OS": This document describes the command for initiating a manual failover. Using this command results in the state shown in the exhibit for RG1

where primaryship is intentionally moved to the other node without an underlying system fault. This supports the conclusion of an administrative failover (Option B).