Multichassis failover and recovery for MLPPP wireless backhaul
AssigneeCoriant Operations, Inc.
InventorsChirayu A. Shah, Sasha Cirkovic
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Abstract
A procedure, and an apparatus, system and computer program that operate in accordance with the procedure, for operating a dual homed communications network. In the procedure, a backup aggregation n ode is configured in accordance with a configuration of a primary multi-service router. A failure is detected in a first communication path that includes a primary multi-service router. In response to the detection, a second, backup communication path is activated that includes a backup multi-service router. In response to the activation, a router is negotiated with so that traffic forwarded by the router is provided to the second, backup communication path instead of the first communication path.
Claims22
A method for operating a dual homed communications network, comprising:
- configuring a backup multi-service router in accordance with a configuration of a primary multi-service router;
- detecting a failure in a first communication path that includes the primary multi-service router;
- activating a second, backup communication path that includes the backup multi-service router, in response to the detecting;
- and
- in response to the activating, negotiating with a router so that traffic forwarded by the router is provided to the second, backup communication path instead of the first communication path,
- wherein the negotiating occurs between the backup multi-service router and the router and includes (i) actively transmitting an IP address of the backup multi-service router from the backup multi-service router to the router, (ii) receiving the IP address of the backup multi-service router at the router, (iii) updating a forwarding address of the router from an IP address of the primary multi-service router to the received IP address of the backup multi-service router, and (iv) forwarding traffic from the router to the second, backup communication path using the updated forwarding address.
A system comprising:
- a backup multi-service router interposed in a backup communication path,
- wherein the backup multi-service router includes:
- a memory storing program instructions, and
- a processor, operating under control of the program instructions, for changing an operating state of the backup multi-service router in response to receiving information over the backup communication path as a result of a failure in a working communication path that includes a primary multi-service router, and negotiating with a router so that traffic forwarded by the router is provided to the backup communication path instead of the working communication path,
- wherein the negotiating occurs between the backup multi-service router and the router and includes (i) actively transmitting an IP address of the backup multi-service router from the backup multi-service router to the router, (ii) receiving the IP address of the backup multi-service router at the router, (iii) updating a forwarding address of the router from an IP address of the primary multi-service router to the received IP address of the backup multi-service router, and (iv) forwarding traffic from the router to the second, backup communication path using the updated forwarding address.
A communication system comprising:
- a primary multi-service router interposed in a first communication path through which traffic is communicated;
- a switch arranged to detect a failure in the first communication path and to activate a second, backup communication path, in response to the failure being detected;
- and
- a backup multi-service router interposed in the second, backup communication path, the backup multi-service router arranged to negotiate with a router in response to activation of the second, backup communication path, such that traffic is communicated via the switch through the second, backup communication path instead of the first communication path and the primary multi-service router,
- wherein the backup multi-service router and the router negotiate by (i) actively transmitting an IP address of the backup multi-service router from the backup multi-service router to the router, (ii) receiving the IP address of the backup multi-service router at the router, (iii) updating a forwarding address of the router from an IP address of the primary multi-service router to the received IP address of the backup multi-service router, and (iv) forwarding traffic from the router to the second, backup communication path using the updated forwarding address.
Dependencies are inferred from the claim text.