Loop detection on switch ports

Starting with KeeneticOS 3.7, loop detection between LAN ports on the switch and Loopback suppression has been implemented.

The feature works on the built-in MT7530 and RTL8370 switches of Keenetic Peak (KN-2710), Hero (KN-1010/1011), Titan (KN-1810), Skipper (KN-1910), Carrier DSL (KN-2110), Hero 4G (KN-2310), Hero DSL (KN-2410), Titan DSL (KN-2510), Giant (KN-2610), and Speedster (KN-3010).

If loops are found, a warning message 'Link loop detected' will appear on the 'System dashboard' page of the router's web interface, in the 'Network ports' information panel.

Link_loop.png

The following messages will appear in the router's system log:

Network::Interface::Switch: "GigabitEthernet0/0": detected a switching loop to port 2.
Network::Interface::Switch: "GigabitEthernet0/1": detected a switching loop to port 1.

NOTE: Important! Please note the following aspects:

— If loops are detected on some LAN ports, the router continues to function and Internet access is not blocked. Only the LAN ports on which a loop is detected become inoperative.
— Loop detection is always enabled and cannot be deactivated.
— Loop detection works inside the switch and neither the CPU nor RAM are affected, i.e. it does not overload the system.

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