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US 8,553,565 B2Granted
Switch apparatus and network system
AssigneeAlaxala Networks Corporation
InventorsKazunori Kamachi, Hiroyuki Dei
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Abstract
A switch apparatus providing with a loop detection function sets a port identification to a port which activates the loop detection function, only receives the loop detection frame by a high-order port in the switch apparatus connected with a backbone network or a high-order switch apparatus on the basis of the port identification set previously, and controls an inactivation of a sending source low-order port that sent the loop detection frame, when the loop detection frame is received by the high-order port.
Claims5
A switch apparatus connected to a network for sending and receiving frames, comprising:
- a high-order port that is connected to a backbone network or a high-order switch;
- a plurality of low-order ports that send a loop detection frame to detect an occurrence of a loop failure;
- and
- a controller that controls the high-order port and the low-order ports,
- wherein the low-order ports are coupled to terminals via a network different from the backbone network,
- wherein the low-order ports includes at least one of a first low-order port that is set to be deactivated when the occurrence of the loop failure is detected and a second low-order port that is set not to be deactivated when the occurrence of the loop failure is detected, and
- wherein the controller determines that the loop failure has occurred, when the high-order port receives the loop detection frame sent from the first low-order port, and deactivates the first low-order port that has sent the loop detection frame when it is determined that the loop failure has occurred.
4 more elements
Dependencies are inferred from the claim text.