IEEE 802.1QAW-2009 pdf download IEEE Standard for Local and metropolitan area networks— Virtual Bridged Local Area Networks Amendment 9: Management of Data Driven and Data Dependent Connectivity Faults
1.Overview
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The data driven and data dependent connectivity fault management capabilities include tools to facilitatediagnosis and isolation of faults sensitive to, or caused by, particular data patterns in transmitted frames.
1.1 Scope
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This standard specifies connectivity fault management protocols, procedures, and managed objects thatprovide confirmation of successful transmission of frames conveying specified data. This capabilitysupports diagnosis of faults sensitive to, or caused by, particular data patterns, and their isolation to part ofthe transmission path. Connectivity verification can be carried out from any single point with bridgedconnectivity to maintenance points on the path, can isolate failures to communicate in a specific direction,and can be carried out while service is being provided to other users of the data path. To this end it
8Defines the extensions to connectivity fault management capabilities defined by Clause 18 throughClause 22 to facilitate diagnosis and isolation of faults sensitive to, or caused by, particular datapatterns in frames transmitted by a service user;Describes the protocols and procedures for data driven and data dependent connectivity faultmanagement(DDCFM).
3. Definitions
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3.1 data driven and data dependent connectivity fault management (DDCFM): DDCFM comprisescapabilities to facilitate detecting and isolating data driven and data dependent faults in Virtual BridgedLocal Area Networks.
data driven and data dependent fault (DDF): A fault that is sensitive to, or caused by, particular3,2data patterns in frames transmitted by a service user.
3.3 Decapsulator Responder (DR): An entity for decapsulating Send Frame Messages and sending thedecapsulated frames towards destinations specified by their own destination address field.
3.4forward path test (FPT): A test to determine if a data frame that matches the specified filtercondition can reach a specific location within a network.
3.5 Reflected Frame Message (RFM): A CFM PDU transmitted by a Reflection Responder in order toperform forward path test.
3.6 Reflection Responder (RR): An entity that encapsulates and reflects selected data frames to a targetlocation and allows a copy of each reflected frame to continue to its destination without encapsulation.
3,7return path test (RPT): A test to determine if a data frame can be sent without error from a specificocation within a network to a station specified by the destination address field of the data frame.
3.8Reflected Frame Message (RFM) Receiver: A function on a bridge port, an end station, or a testequipment to receive Reflected Frame Message(S) and pass them to the corresponding, non-standardized.RFM analyzer.
39Send Frame Message (SFM):A CFM PDU destined to a Decapsulator Responder in order to performreturn path test.
3.10 Send Frame Message (SFM) Originator:A function on a bridge interface, an end station, or a testequipment to send SFM encapsulated data frames.