Proxmox Networking — Bridges, VLANs, and a Clean Host Topology
A Proxmox bridge connects guest interfaces to a network. VLAN filtering determines which VLANs traverse its ports. Routing and firewall policy determine which subnets may communicate. Start by documenting what the physical switch sends to the host. A correct guest VLAN tag cannot fix a mismatch on the uplink. Verification status Area Evidence and limits Technical review Reviewed against the official references below on October 31, 2026. Shell examples Bash syntax checked; no host networking commands executed. Configuration Illustrative single-uplink IPv4 lab, not a captured production configuration. Runtime Application, rollback, DHCP, guest traffic, and firewall behavior remain untested for this revision. 1. Identify the management path These two designs are different: ...