US 12,237,977 B2
Method for resuming topology of single loop network and switch network system
Chih-Ming Chiu, Hsinchu (TW); Kai-Wen Cheng, Hsinchu (TW); and Yu-Yi Lin, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed on Jan. 3, 2023, as Appl. No. 18/092,788.
Claims priority of application No. 111122299 (TW), filed on Jun. 15, 2022.
Prior Publication US 2023/0412463 A1, Dec. 21, 2023
Int. Cl. H04L 41/12 (2022.01); H04L 41/34 (2022.01); H04L 41/40 (2022.01)
CPC H04L 41/12 (2013.01) [H04L 41/34 (2022.05); H04L 41/40 (2022.05)] 16 Claims
OG exemplary drawing
 
1. A method for resuming a topology of a single loop network, wherein the single loop network comprises at least one first network switch and a second network switch, each of the at least one first network switch comprises a first port and a second port, and the second network switch comprises a third port and a fourth port; each of the first port, the second port, the third port, and the fourth port is in an enabled state or a disabled state by default so as to form a single loop network, and the method comprises:
in response to one of the at least one first network switch detecting that the first port is abnormal, setting the first port to the disabled state by the first network switch and transmitting a recovery control frame through the second port by the first network switch;
in response to the second network switch receiving the recovery control frame, setting the third port in the disabled state to the enabled state by the second network switch;
in response to one of the at least one first network switch detecting that the first port is resumed, transmitting a block control frame through the second port by the first network switch;
in response to the second network switch receiving the block control frame, setting the third port in the enabled state to the disabled state by the second network switch and transmitting a forward control frame through the fourth port by the second network switch; and
in response to one of the at least one first network switch receiving the forward control frame, setting the first port in the disabled state to the enabled state by the first network switch;
wherein the recovery control frame, the block control frame, and the forward control frame do not contain the MAC address of a transmission end and an ID of the transmission end.