Lesser disruptive open shortest path first handling of bidirectional forwarding detection state changes
First Claim
Patent Images
1. A computerized method comprising:
- receiving a link down event associated with a link fault protocol for a link between a first node and a neighboring node;
removing a data structure associated with the neighboring node from a forwarding table with a routing protocol running on the first node, in response to receiving the link down event;
reserving the data structure for adjacency recovery; and
placing the neighboring node in the initialize state of the routing protocol.
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Abstract
A method and apparatus for processing link down events associated with links between adjacent nodes is described. A node receives link down events associated with a link fault protocol for a link between the node and a neighboring node. In response to receiving the link down event, the node removes a data structure associated with the neighboring node from a forwarding table associated with a routing protocol running on the node. The node reserves the data structure for speedy adjacency recovery. In addition, the node places the neighboring node in the initialize state of the routing protocol.
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Citations
32 Claims
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1. A computerized method comprising:
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receiving a link down event associated with a link fault protocol for a link between a first node and a neighboring node; removing a data structure associated with the neighboring node from a forwarding table with a routing protocol running on the first node, in response to receiving the link down event; reserving the data structure for adjacency recovery; and placing the neighboring node in the initialize state of the routing protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A machine-readable medium that stores instructions, which when executed by a set of one or more processors, cause said set of processors to perform operations comprising:
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receiving a link down event associated with a link fault protocol for a link between a first node and a neighboring node; removing a data structure associated with the neighboring node from a forwarding table with a routing protocol running on the first node, in response to receiving the link down event; reserving the data structure for adjacency recovery; and placing the neighboring node in the initialize state of the routing protocol. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus comprising:
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a link state change module to generate a link down event; and a routing table module to receive the link down event associated with a link fault protocol for a link between a first node and a neighboring node, remove a data structure associated with the neighboring node from a forwarding table with a routing protocol running on the first node, in response to receiving the link down event, reserve the data structure for adjacency recovery, and place the neighboring node in the initialize state of the routing protocol. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A network element comprising:
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a set of one or more line cards, wherein the line card is configured to, receiving a link down event associated with a link fault protocol for a link between a first node and a neighboring node, removing a data structure associated with the neighboring node from a forwarding table with a routing protocol running on the first node, in response to receiving the link down event, reserving the data structure for adjacency recovery, and placing the neighboring node in the initialize state of the routing protocol; a set of one or more control cards, the control cards to control forwarding of packets between the set of one or more line cards. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification