US 2015/0312121 A1Published application

Relay System and Switching Device

AssigneeHitachi Metals, Ltd.

InventorsMakoto YASUDA, Shigeru TSUBOTA

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Abstract

A first fault monitoring unit monitors presence/absence of fault on a communication path between bridge ports, and a second fault monitoring unit monitors presence/absence of fault on a communication path via a ring network between upper link ports. A third fault monitoring unit monitors presence/absence of fault at a MCLAG port. When a monitoring result by the third fault monitoring unit changes from absence of fault to presence of fault, a MCLAG control unit transmits a fault notification frame. At this time, when a monitoring result by the first fault monitoring unit is absence of fault, the MCLAG control unit transmits the fault notification frame from the bridge port, and when the monitoring result by the first fault monitoring unit is presence of fault and a monitoring result by the second fault monitoring unit is absence of fault, it transmits the fault notification frame from the upper link port.

Claims12

Dependent claims

A relay system comprising:

a first switching device and a second switching device each having an upper link port, a MCLAG port, and a bridge port, the first switching device and the second switching device being connected to each other by a communication line via the bridge ports;
a third switching device connected to the MCLAG port of the first switching device and to the MCLAG port of the second switching device via different communication lines, the third switching device setting a link aggregation on ports serving as connection sources of the communication lines;
and
a fourth switching device disposed on a communication path between the upper link port of the first switching device and the upper link port of the second switching device, the fourth switching device constituting a ring network together with the first switching device and the second switching device,
wherein each of the first switching device and the second switching device includes:
a first fault monitoring unit which monitors presence and absence of a fault on a communication path between the bridge ports;
a second fault monitoring unit which monitors presence and absence of a fault on a communication path via the ring network between the upper link ports;
a third fault monitoring unit which monitors presence and absence of a fault at the MCLAG port;
and
a MCLAG control unit which transmits a fault notification frame when a monitoring result by the third fault monitoring unit changes from absence of fault to presence of fault, and
when a monitoring result by the first fault monitoring unit is absence of fault, the MCLAG control unit transmits the fault notification frame from the bridge port, and when the monitoring result by the first fault monitoring unit is presence of fault and a monitoring result by the second fault monitoring unit is absence of fault, the MCLAG control unit transmits the fault notification frame from the upper link port.

8 more elements

A switching device having an upper link port connected to a ring network, a MCLAG port, and a bridge port, the switching device being connected to a different switching device via the bridge port, the switching device comprising:

a first fault monitoring unit which monitors presence and absence of a fault on a communication path between the bridge port and a bridge port of the different switching device;
a second fault monitoring unit which monitors presence and absence of a fault on a communication path via the ring network between the upper link port and an upper link port of the different switching device;
a third fault monitoring unit which monitors presence and absence of a fault at the MCLAG port;
and
a MCLAG control unit which transmits a fault notification frame when a monitoring result by the third fault monitoring unit changes from absence of fault to presence of fault,
wherein, when a monitoring result by the first fault monitoring unit is absence of fault, the MCLAG control unit transmits the fault notification frame from the bridge port, and when the monitoring result by the first fault monitoring unit is presence of fault and a monitoring result by the second fault monitoring unit is absence of fault, the MCLAG control unit transmits the fault notification frame from the upper link port.

3 more elements

Dependencies are inferred from the claim text.