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LMP Link Verification Clarification requested
The LMP Link Verification BEGIN_VERIFY class allows for the
Verify Transport Mechanism to carry a mask of allowed transports. The
TransmissionRate field contains:
"This
is the transmission rate of the data link over which the Test messages
will be transmitted"
It appears there may be multiple interpretations of this statement. One
interpretation is that this refers to the same data link used throughout
the rest of the specification (i.e. an OC3 = ~155M/8 bytes per second).
An alternate interpretation would be that this refers to the transmission
rate of the test messages themselves (i.e. DCCS = 192K/8 bytes/sec)
Which interpretation is correct?
If the latter (i.e. the transmission rate of the test messages), then the
following questions need to be addressed:
The first question I have is how multiple Transport Mechanisms can be
advertised with one TransmissionRate.
Let's say that an OC3 interface is capable of verifying over J0-16, DCCS,
and Payload.
J0-16 could be interpreted as 16 bytes/sec.
DCCS could be 192K/8 bytes/sec.
Payload could be ~155M/8 bytes/sec.
The second question involves ambiguity when DCCS is specified. The DCCS
data rate of 192K/8 is the same for OC3, OC12, OC48, etc. Knowing the
DCCS data rate does not provide useful information for interface
termination. The source device might be sending SDCC over OC12, while the
receiver might choose to terminate at OC48.
One possible solution to this problem rests on the interpretation of
"transmission rate of the data link". If the TransmissionRate
refers to the full SONET/SDH interface regardless of the Transport
Mechanism, then both of the above problems are resolved.