{"draft":"draft-foschiano-udld-03","doc_id":"RFC5171","title":"Cisco Systems UniDirectional Link Detection (UDLD) Protocol","authors":["M. Foschiano"],"format":["ASCII","HTML"],"page_count":"13","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"INDEPENDENT","abstract":"This document describes a Cisco Systems protocol that can be used to\r\ndetect and disable unidirectional Ethernet fiber or copper links\r\ncaused, for instance, by mis-wiring of fiber strands, interface\r\nmalfunctions, media converters' faults, etc.  It operates at Layer 2\r\nin conjunction with IEEE 802.3's existing Layer 1 fault detection\r\nmechanisms.\r\n\r\nThis document explains the protocol objectives and applications,\r\nillustrates the specific premises the protocol was based upon, and\r\ndescribes the protocol architecture and related deployment issues to\r\nserve as a possible base for future standardization.  This memo provides \r\ninformation for the Internet community.","pub_date":"April 2008","keywords":["Ethernet","switches","LAN","IEEE","802","spanning tree","STP","FEFI","autonegotiation"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC5171","errata_url":null}