Motorola PowerQUICC II MPC8280 Series Reference Manual page 1047

31.6.6.1 Running a Performance Block Test
For bidirectional PM block tests, FMCs are monitored at the receive side and generated at
the transmit side. The following setup is required to run a bidirectional PM block test on an
active VCC:
1. Assign one of the available 64 performance monitoring tables by writing to both
RCT[PMT] and TCT[PMT] and initializing the one chosen. See Section 31.10.3,
"OAM Performance Monitoring Tables."
2. For PM F5 segment termination set RCT[SEGF]; for PM F5 end-to-end
termination set RCT[ENDF].
3. Finally, set the channel's RCT[PM] and TCT[PM] and the receive raw cell's
RCT[PM].
For unidirectional PM block tests:
• For PM block monitoring only, set only the RCT fields above.
• For PM block generation only, set only the TCT fields above.
To run a block test on a VPC, assign all the VCCs of the tested VPC to the same
performance monitoring table. Configure RCT[PMT] and TCT[PMT] to specify the
performance monitoring table associated with each F4 channel.
31.6.6.2 PM Block Monitoring
PM block monitoring is done by the receiver. After initialization (see Section 31.6.6.1),
whenever a cell is received for a VCC or VPC, the TRCC counters are incremented and the
BEDC is calculated. When an FMC is received, the CP adds the BRC fields into the cell
payload (TRCC , TRCC
0
user can monitor the BRC cell results and transfer the cell to the transmit raw cell queue.
Before the BRC is transferred to the transmit raw cell queue, the PM function type should
be changed to backward reporting and additional checking should be done regarding the
BLER field. If the sequence numbers (MCSN) of the last two FMCs are not sequential or
the differences between the last two TUCs and the last two TRCCs are not equal, BLER
should be set to all ones (see the ITU I.610 recommendation).
TRCCs are free-running counters (modulo 65,536) that count
user cells received. The total received cells of a particular block
is the difference between TRCC values of two consecutive
BRC cells. TRCC values are taken from a VC's performance
monitoring table.
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, BLER) and transfers the cell to the receive raw cell queue. The
0+1
NOTE
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