상황
A two-node Proxmox VE cluster requires a separate, redundant Corosync network to avoid split-brain and an external QDevice for quorum.
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01
Redundant ring switches for Corosync traffic
02
External QDevice to break ties in 2-node quorum
03
Shared storage reachable from both nodes
Reuse for any 2-node Proxmox VE cluster diagrams where split-brain prevention and quorum design matter.