High speed variable length best match look-up in a switching device
CA 2274962 C · Owner: Juniper Networks · Inventors: Sindhu, Pradeep S.; Patel, Rajiv N.; Ferguson, Dennis C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for looking up a key associated with a packet to determine a route through a routing device the method including, upon receipt , of a key forward traversing one or more nodes which make up a trie stored in a memory by evaluating at each node traversed a bit in the key as indicated by a bit-to-test indicator associated with each node. A value of the bit in the key determining the path traversed along the trie. The method includes locating an end node having a route and comparing the route to the key (528). If they match, destination information associated with the end node is outputted to guide the transfer of the packet through the routing device (529). If …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 16, 1997 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.