Method for establishing high resilient active recovery for BGP route reflectors
AssigneeAT&T Intellectual Property I, L.P.
InventorsIsrael Means, Praveen Ramadenu
Life of this patent
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Abstract
A recovery route reflector with a monitoring module and a BGP state establishment module is peered with a plurality of primary route reflectors. Each of the plurality of primary route reflectors is peered with a set of provider edge devices. The BGP state between the recovery route reflector and the plurality of primary route reflectors is periodically monitored. When a primary route reflector fails the BGP state between the recovery route reflector and the failed primary route reflectors is idle, and the recovery route reflector establishes a peer session with the provider edge devices that had been peered with the failed route reflector.
Claims20
A method comprising:
- establishing a first peer session between a recovery route reflector and a first route
- reflector wherein the first route reflector has established a first provider edge peer session with a first set of provider edge devices;
- establishing a second peer session between the recovery route reflector and a second route reflector wherein the second route reflector has established a second provider edge peer session with a second set of provider edge devices;
- monitoring a first Border Gateway Protocol (BGP) state between the first route reflector and the recovery route reflector and a second BGP state between the second route reflector and the recovery route reflector;
- and
- when the first Border Gateway Protocol (BGP) state is idle, establishing a peer session between the recovery route reflector and the first set of provider edge devices.
A system comprising:
- a first route reflector with a set of established first provider edge peer sessions with a first set of provider edge devices;
- a second route reflector with a set of established second peer sessions with a second set of provider edge devices;
- a recovery route reflector with an established first recovery route reflector peer session with the first route reflector and an established second recovery route reflector peer session with the second route reflector;
- a monitoring module in the recovery route reflector that monitors a first Border Gateway Protocol (BGP) state between the first route reflector and the recovery route reflector and a second Border Gateway Protocol (BGP) state between the second route reflector and the recovery route reflector;
- and a Border Gateway Protocol (BGP) state establishment module in the recovery route reflector that establishes a peer session between the recovery route reflector and the first set of provide edge devices when the first Border Gateway Protocol (BGP) state is idle.
A non-transitory computer readable storage medium storing an information processing program to cause a computer to execute a process comprising:
- establishing a first peer session between a recovery route reflector and a first route reflector wherein the first route reflector has established a first provider edge peer session with a first set of provider edge devices;
- establishing a second peer session between the recovery route reflector and a second route reflector wherein the second route reflector has established a second provide edge peer session with a second set of provider edge devices;
- monitoring a first Border Gateway Protocol (BGP) state between the first route reflector and the recovery route reflector and a second Border Gateway Protocol (BGP) State the second route reflector and the recovery route reflector;
- and
- when the first Border Gateway Protocol (BGP) state is idle, establishing a peer session between the recovery route reflector and the first set of provider edge devices.
Dependencies are inferred from the claim text.