Method and apparatus for limiting topology and reachability information in an OSPF area
US-9503357-B2 · Nov 22, 2016 · US
Managing grey zones of unreachable nodes in computer networks
US9118539B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9118539-B2 |
| Application number | US-201213561985-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 30, 2012 |
| Priority date | Jul 30, 2012 |
| Publication date | Aug 25, 2015 |
| Grant date | Aug 25, 2015 |
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Abstract
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In one embodiment, a node (e.g., a root-node) of a currently known directed acyclic graph (DAG) topology of a computer network can identify a sub-DAG of one or more nodes that are unreachable. The node can further determine a scope of the unreachable nodes of the sub-DAG and tunnel a redirected message to a reachable node of the DAG topology that is adjacent to at least one of the unreachable nodes of the sub-DAG. The redirected message may cause the reachable node to distribute the redirected message to one or more of the unreachable nodes of the sub-DAG based on the scope.
First claim
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What is claimed is: 1. A method, comprising: identifying, within a currently known directed acyclic graph (DAG) topology of a computer network, a sub-DAG of nodes that are unreachable, wherein the sub-DAG of unreachable nodes is a grey zone, the grey zone an area of the network where there is a lack of proper routing information to properly forward messages even though a feasible underlying path could exit; determining a scope of the unreachable nodes of the sub-DAG; tunneling…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H04L45/025Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9118539B2 cover?
- In one embodiment, a node (e.g., a root-node) of a currently known directed acyclic graph (DAG) topology of a computer network can identify a sub-DAG of one or more nodes that are unreachable. The node can further determine a scope of the unreachable nodes of the sub-DAG and tunnel a redirected message to a reachable node of the DAG topology that is adjacent to at least one of the unreachable n…
- Who is the assignee on this patent?
- Vasseur Jean-Philippe, Hui Jonathan W, Cisco Tech Inc
- What technology area does this patent fall under?
- Primary CPC classification H04L45/025. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 25 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).