Method and apparatus for coordinating fault recovery techniques among domains
First Claim
1. A method for coordinating recovery in a network, the method comprising:
- notifying a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and
given an indication related to notifying the first recovery domain, applying the indication to a policy to determine whether the first recovery domain is to take action.
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Accused Products
Abstract
In a telecommunications/data network, it is common to have multiple recovery domains each employing its own technique for recovering a fault that may be different from a technique employed by another domain. Permitting multiple recovery domains to recover a fault without coordination among the domains can result in adverse interactions, such as rapid and repeated changes in the actions taken or “flapping,” and repeated hits to traffic. A method and corresponding apparatus for coordinating fault recovery in a network, according to an embodiment of the present invention, notifies a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network. Coordinating the recovery efforts of the first and second recovery domains reduces fault recovery time and allows concurrent actions to be taken.
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Citations
32 Claims
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1. A method for coordinating recovery in a network, the method comprising:
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notifying a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and given an indication related to notifying the first recovery domain, applying the indication to a policy to determine whether the first recovery domain is to take action. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for coordinating recovery in a network, the method comprising:
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notifying a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and responsive to an alarm indication signal (AIS) received by a switching node within the second recovery domain, applying a recovery-in-progress signal.
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15. A method for coordinating recovery in a network, the method comprising:
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notifying a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and responsive to detecting the fault, at a switching node within the second recovery domain, applying an alarm indication signal (AIS) and recovery-in-progress signal.
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16. A method for coordinating recovery in a network, the method comprising:
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notifying a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and monitoring for a recovery-in-progress signal by a switching node within the second recovery domain and, optionally, performing an action responsive to the recovery-in-progress signal.
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17. An apparatus to coordinate recovery in a network, the apparatus comprising:
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an interface communicatively coupled to the network; a notifying unit communicatively coupled to the interface to notify a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and given an indication related to notifying the first recovery domain, an applying unit communicatively coupled to the notifying unit to apply the indication to a policy to determine whether the first recovery domain is to take action. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An apparatus to coordinate recovery in a network, the apparatus comprising:
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an interface communicatively coupled to the network; a notifying unit communicatively coupled to the interface to notify a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and an applying unit communicatively coupled to the notifying unit to apply a recovery-in-progress signal in response to an alarm indication signal (AIS) received by a switching node within the second recovery domain.
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31. An apparatus to coordinate recovery in a network, the apparatus comprising:
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an interface communicatively coupled to the network; a notifying unit communicatively coupled to the interface to notify a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network; and an applying unit communicatively coupled to the notifying unit to apply an alarm indication signal (AIS) and recovery-in-progress signal in response to detecting the fault at a switching node within the second recovery domain.
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32. A computer program product including a non-transitory computer readable medium having a computer readable program stored thereon, the computer readable program, when executed by a computer, transforms the computer into a programmed computer and causes the programmed computer to:
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in a network; notify a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network to coordinate recovery in the network; and given an indication related to notifying the first recovery domain, apply the indication to a policy to determine whether the first recovery domain is to take action.
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Specification