It means that speed between CPU and all devices connected to LAN ports is 1Gbps. It affects only communication to WAN port or services that are running on Turris. Speed between LAN devices is untouched.
It means that speed between CPU and all devices connected to LAN ports is 1Gbps. It affects only communication to WAN port or services that are running on Turris. Speed between LAN devices is untouched.