pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 109

• Manufacturer Part Number: pxf4336
• Description: Abm Premium Atm Buf Fer Manager
• Manufacturer: Infineon Technologies Corporation

Figure 3-46 Distribution of VS/VD Function in a Switch
VS/VD Options
Destination Behavior (ATM Forum TM 4.1 spec. rule 3 options): If FRM cells are received
and turned into BRM cells, while older BRM cells are still waiting for transmission, the
contents overwrite option is supported. The new BRM cell is scheduled in place of the
old BRM cell for in-rate transmission. The old BRM cell is lost.
Data Sheet
PHY1
Legend:
ABR VC_f = ABR connection in forward direction
ABR VC_b = ABR connection in backward direction
FRM = forward Resource Management cell
BRM = backward Resource Managment cell
ABR VC_f
FRM_f
BRM_b
FRM_b
BRM_f
ABR VC_b
ABR segment 1
LCI=a
= Queue with peak rate limiter
ä ä ä ä
≈ ≈ ≈ ≈
Line card with ABM-P
VD
VS
overflow
adjust
No ABR Protocol
Switch
109
Core
Notes:
•
•
per-VC queues separate rates in both ABR segments
serving rates of queues dynamically adjusted
ä ä ä ä
≈ ≈ ≈ ≈
= Virtual Source
= Virtual Destination
Line Card with ABM-P
overflow
adjust
VS
VD
Functional Description
ä ä ä ä
≈ ≈ ≈ ≈
ABR VC_b
ABR VC_f
ABR segment 2
BRM_b
FRM_b
FRM_f
BRM_f
LCI=b
PXF 4336 V1.1
2001-12-17
PHY2
ABM-P