{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9647926","patent":{"patent_number":"US-9647926","title":"Procedure to identify multi-homed prefixes for IS-IS LFA","assignee":null,"inventors":[],"filing_date":"2014-03-17T00:00:00.000Z","publication_date":"2017-05-09T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":17,"abstract":"A method of a network device identifies multi-homed prefixes in an intermediate system-intermediate system (IS-IS) area or IS-IS domain during shortest path first (SPF) computation for use in a loop free alternate (LFA) computation. The method and network device select a next node in a shortest path tree (SPT) and determine a set of prefixes associated with the selected node in the SPT. A next prefix from the set of prefixes of the selected node is selected and a check is made whether the selected prefix exists in the local RIB associated with another node of a same level, then the selected prefix is marked as a multi-homed prefix in the local RIB. A check is made whether all prefixes associated with the selected node are processed and whether all nodes in the SPT have been processed, before downloading the local RIB to a global RIB."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Procedure to identify multi-homed prefixes for IS-IS LFA","description":"A method of a network device identifies multi-homed prefixes in an intermediate system-intermediate system (IS-IS) area or IS-IS domain during shortest path first (SPF) computation for use in a loop f","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9647926","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9647926","citation_suggestion":"Patentable. \"Procedure to identify multi-homed prefixes for IS-IS LFA\" (US-9647926). https://patentable.app/patents/US-9647926","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9647926","json":"https://patentable.app/api/llm-context/US-9647926","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:39:32.284Z"}