Method and system for implementing virtual circuit status consistency
First Claim
1. A method for implementing virtual circuit status consistency, comprising:
- receiving, by a second provider edge router, a first extended network layer reachability information (NLRI) message from a first provider edge router, wherein the NLRI includes a circuit status vector (CSV) property;
when a first value included in the CSV property represents that a station of the first provider edge router is available, establishing, by the second provider edge router, a virtual circuit from the second provider edge router to the first provider edge router;
determining, by the second provider edge router, a status of a virtual circuit from the first provider edge router to the second provider edge router, according to a second extended NLRI message received from the first provider edge router, wherein a second value included in the CSV property represents the status of the virtual circuit from the first provider edge router to the second provider edge router; and
updating, by the second provider edge router, a status of the virtual circuit from the second provider edge router to the first provider edge router, so as to make the status of the virtual circuit from the second provider edge router to the first provider edge router consistent with that of the virtual circuit from the first provider edge router to the second provider edge router.
1 Assignment
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Accused Products
Abstract
A method and a system for implementing virtual circuit status consistency. A transmitting provider edge router (PE) send an extended network layer reachability information (NLRI) message to a remote PE; the remote PE updates the status of the virtual circuit from the remote PE to the transmitting PE, according to the received extended NLRI message, so as to make the status of the virtual circuits between the transmitting PE and the remote PE consistent. A system for implementing virtual circuit status consistency, the first provider edge router (PE1) in the system sending an extended network layer reachability information (NLRI) message to a second provider edge router (PE2); the PE2 updates the status of the virtual circuit from the PE2 to the PE1 according to the received extended NLRI message, so as to make the status of the bidirectional virtual circuits between the PE1 and the PE2 consistent.
4 Citations
17 Claims
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1. A method for implementing virtual circuit status consistency, comprising:
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receiving, by a second provider edge router, a first extended network layer reachability information (NLRI) message from a first provider edge router, wherein the NLRI includes a circuit status vector (CSV) property; when a first value included in the CSV property represents that a station of the first provider edge router is available, establishing, by the second provider edge router, a virtual circuit from the second provider edge router to the first provider edge router; determining, by the second provider edge router, a status of a virtual circuit from the first provider edge router to the second provider edge router, according to a second extended NLRI message received from the first provider edge router, wherein a second value included in the CSV property represents the status of the virtual circuit from the first provider edge router to the second provider edge router; and updating, by the second provider edge router, a status of the virtual circuit from the second provider edge router to the first provider edge router, so as to make the status of the virtual circuit from the second provider edge router to the first provider edge router consistent with that of the virtual circuit from the first provider edge router to the second provider edge router. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for implementing virtual circuit status consistency, comprising a first provider edge router and a second provider edge router, wherein,
the first provider edge router is adapted to send an extended network layer reachability information (NLRI) message, wherein the NLRI includes a circuit status vector (CSV) property; -
the second provider edge router is adapted to establish a virtual circuit from the second provider edge router to the first provider edge router when a first value included in the CSV property of a first NLRI message represent that a station of the first provider edge router is available; the second provider edge router is further adapted to determine a status of a virtual circuit from the first provider edge router to the second provider edge router according to a second extended NLRI message received from the first provider edge router, and update a status of the virtual circuit from the second provider edge router to the first provider edge router, so as to make the status of the virtual circuit from the second provider edge router to the first provider edge router consistent with that from the first provider edge router to the second provider edge router, wherein a second value included in the CSV property represents the status of the virtual circuit from the first provider edge router to the second provider edge router. - View Dependent Claims (11, 12, 13, 14)
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15. A router, comprising:
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a module adapted to receive an extended network layer reachability information (NLRI) message, wherein the NLRI includes a circuit status vector (CSV) property; a module adapted to establish a virtual circuit from the present router to another router when a first value included in the CSV property of a first NLRI message represents that a station of the another router is available; a status determining module adapted to determine a status of a virtual circuit from the another router to the present router according to a second extended NLRI message received from the another router; and a status updating module adapted to update a status of the virtual circuit from the present router to the other router, so as to make the status of the virtual circuit from the present router to the another router consistent with the status of the virtual circuit from the another router to the present router. - View Dependent Claims (16, 17)
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Specification