In these cases, relaxed frames are
not discarded.
OAM
The Operations, Administration, and Maintenance (OAM) entity of RPR provides a set
of control functions and indications to support fault management, and performance
management.
The services provided by the RPR OAM are
?– Determine and validate connectivity between any two stations on the ring
?– Determine and validate transit path operation for any service class
?– Provide a mechanism to help in misorder prevention
?– Provide performance monitoring parameters
Special control frames enable the detection and isolation of failures at the ring layer.
These frames can be used either during service provisioning or continuously to minimize
the correction time of abnormal operation.
The OAM frame types supported are: Echo request/response, Flush and Organization
specific.
Echo Request/Response The client can request an echo request/response operation to
a specified destination in order to check the reachability of that station. An echo operation
allows a frame to be inserted at one station in the ring, and an echo response returned
by another station through the same or opposite ringlet.
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