ATM Traffic Descriptors
PCR CLP=0+1, SCR CLP=0, and MBS CLP=0 With Tagging
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/05B-7
Beta Draft Confidential
All values in the table represent the measured traffic rate at a given point in time.
Table B-4.  PCR CLP=0+1, SCR CLP=0, and MBS CLP=0 With Tagging
CLP=0+1 
CPS 
SCR of 
CLP=0 
Stream
MBS of 
CLP=0 
Stream
Result
68,000 40,000 30 The switch does not drop or tag any cells because 
the stream does not exceed traffic parameters.
70,000 40,000 60 CLP=0 cells from the aggregate cell stream are 
tagged if the burst tolerance is exceeded. The 
number of cells that are tagged depends on the 
traffic pattern combination of sustained and burst 
cells. The larger the burst, the more cells are 
tagged.
70,000 50,000 30 The switch tags as many as 10,000 CLP=0 CPS 
because CLP=0 exceeds the SCR. It may tag 
additional cells because the cell burst of 30 cells at 
PCR, combined with the sustained traffic, may 
exceed the burst tolerance.
77,000 40,000 60 The switch drops 7,000 CPS from the CLP=0+1 
stream because CLP=0+1 exceeds the PCR. The 
number of CLP=0 and CLP=1 cells that are 
dropped depends on the ratio of CLP=0 to CLP=1 
cells in the aggregate stream. In addition, the 
switch will tag some CLP=0 cells if they exceed 
the burst tolerance.