Loop avoidance communications method, device, and system
AssigneeHuawei Technologies Co., Ltd.
InventorsChongyang Hu, Haibo Wang
Life of this patent
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Abstract
In a loop avoidance communications method, a first provider edge (PE) device sends a first identifier to a second PE device through a first interface; the first PE device receives, from the second PE through the first interface, a data packet including the first identifier. Then, the first PE device determines that a second interface associated with the first identifier is in a faulty state. In response to determining that the second interface is in the faulty state, the first PE device avoids sending the data packet to the second PE device through the first interface. The first PE device connects to a customer edge (CE) device using the second interface.
Claims24
A communications method implemented by a first provider edge (PE) device and comprising:
- sending a segment identifier (SID) to a second PE device, wherein an operation associated with the SID comprises forwarding a data packet through a second interface of the first PE device, wherein the first PE device and the second PE device are connected to a customer edge (CE) device in an all-active mode, wherein the first PE device is connected to the CE device through the second interface, and wherein the first PE device is connected to the second PE device through a first interface of the first PE device;
- receiving the data packet from the second PE device via the first interface, wherein the data packet comprises a destination address that is the SID;
- and
- avoiding sending the data packet via the first interface when the second interface is in a faulty state.
A first provider edge (PE) device comprising:
- a first interface configured to connect to a second PE device;
- a second interface configured to connect to a customer edge (CE) device that is multi-homed to the first PE device and the second PE device in an all-active mode, wherein an operation associated with a segment identifier (SID) comprises forwarding a data packet through the second interface;
- and
- a processor coupled to the first interface and the second interface and configured to:
- send the SID to the second PE device;
- receive the data packet from the second PE device via the first interface, wherein the data packet comprises a destination address that is the SID;
- and
- avoid sending the data packet via the first interface when the second interface is in a faulty state.
A communications system comprising:
- a second provider edge (PE) device;
- and
- a first PE device comprising a first interface and a second interface and configured to:
- connect via the second interface to a customer edge (CE) device that is multi-homed to the first PE device and the second PE device in an all-active mode;
- connect to the second PE device via the first interface;
- send a segment routing (SID) to the second PE device, wherein an operation associated with the SID comprises forwarding a data packet through the second interface;
- receive the data packet from the second PE device and via the first interface, wherein the data packet comprises a destination address that is the SID;
- and
- avoid sending the data packet via the first interface when the second interface is in a faulty state,
- wherein the second PE device is configured to:
- receive the SID from the first PE device;
- and
- send the data packet to the first PE device via the first interface.
Dependencies are inferred from the claim text.