
PXB 4330 E
List of Figures
Page
Semiconductor Group
4
Application Note 11.98
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Scheduler- and Global Queue Structure per ABM Core . . . . . . . . . . . . .6
Queue Arrangement per Scheduler. . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Absolute and Relative Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Assignment of Queues to Schedulers and Traffic Classes . . . . . . . . . .18
ABR CI/NI Marking in the BRM Cell for the Bi-directional
Mode of the ABM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Uni-directional Mode with Both Cores (Both Cores Used by VC) . . . . .26
Uni-directional Mode with Both Cores (Only one Core Used by VC). . .26
Uni-directional Mode with Only one Core
(only Upstream Core can be used) . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Example 1 of Threshold Configuration. . . . . . . . . . . . . . . . . . . . . . . . . .37
Difference between BufNrtMax/BufNrtEPD and TrafClassMax . . . . . . .39
Example 2 of Threshold Configuration. . . . . . . . . . . . . . . . . . . . . . . . . .46
Buffer sharing of n Connections/ Queues:
Real Configuration (top) and Equivalent Diagram (below). . . . . . . . . . .51
Output Queue Size in Cells/ Packets depending on Output Load in % .52
Buffer dimensioning Example for a Scheduler. . . . . . . . . . . . . . . . . . . .53
Bandwidth Partition Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Scheduler with given Queue Rates and Resulting Output
Queue Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
CAC Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17