Method and system for controlling distribution of network topology information
First Claim
1. A method for controlling distribution of topology information in a network utilizing source routing, comprising:
- recording link state information, associated with links between nodes within a network, in master routing tables to form an overall network topology map of links within the network;
modifying the link state information based on predetermined policy statements to form modified link state information that yields abridged routing tables differing from the master routing tables of the overall network topology map; and
distributing the modified link state information to at least one node in the network.
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Abstract
In accordance with one aspect of the present invention, a network topology management system is provided for managing distribution of network topology information between nodes within a network that performs a distributed source routing protocol. The system includes, nodes distributed throughout a network, that are interconnected by node-to-node links, each of which is described by associated link state information. The system includes a control module that is joined to the nodes and that receives the link state information from each node. The control module records the link state information in master routing tables to form an overall topology map of the network. The control module stores predetermined policy statements that define a manner in which the link state information should be distributed between the nodes. The control module creates abridged routing tables by modifying the link state information based on the predetermined policy statements. The abridged routing tables differ from the master routing tables of the overall network topology map. The control module distributes the abridged routing tables to at least one of the nodes in the network. The control module may entirely mask a select link state such that an abridged routing table entirely excludes connectivity between a select node and a select neighboring node. The control module may modify link state attributes to form different first and second sets of abridged routing tables that are provided to different first and second nodes, respectively.
64 Citations
20 Claims
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1. A method for controlling distribution of topology information in a network utilizing source routing, comprising:
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recording link state information, associated with links between nodes within a network, in master routing tables to form an overall network topology map of links within the network;
modifying the link state information based on predetermined policy statements to form modified link state information that yields abridged routing tables differing from the master routing tables of the overall network topology map; and
distributing the modified link state information to at least one node in the network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A network topology management module configured to communicate with a network of distributed nodes that are interconnected by node-to-node links, each node-to-node link having link state information associated therewith, the management module comprising:
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memory storing master routing tables and predetermined policy statements; and
a control module receiving link state information associated with the node-to-node links, the control module recording the link state information in the master routing tables to form an overall topology map of the network, the control module modifying the link state information based on the predetermined policy statements to form modified link state information that yields abridged routing tables differing from the master routing tables of the overall network topology map, the control module distributing the modified link state information to at least one of the nodes in the network. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification