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Articles
2025
Daily Debugging: PVE Cross-VLAN Ping Fails (Wrong Default Gateway + OpenWrt LAN NAT)
A classic multi-VLAN connectivity incident: ICMP times out while the target clearly replies locally. The real causes are asymmetric routing from a wrong PVE default gateway and an OpenWrt misconfiguration that enables SNAT (masquerade) on the LAN zone. Fixed with hop-by-hop captures and minimal config changes.