PXF4336V11 INFINEON [Infineon Technologies AG], PXF4336V11 Datasheet - Page 152
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PXF4336V11
Manufacturer Part Number
PXF4336V11
Description
ABM Premium ATM Buf fer Manager
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PXF4336V11.pdf
(425 pages)
- Current page: 152 of 425
- Download datasheet (6Mb)
assigned to the WFQ scheduler of the ABM-P. The weight factor of the logical queue is
derived from the MCR according to the formulas given in
The ABM-P in turn guarantees the MCR when per VC queueing is used and the
appropriate weight factor is set for the queue. By assigning ABR connections to the WFQ
scheduler, fair allocation of available bandwidth in proportion to the MCR is achieved.
Connection Acceptance Control (CAC) must assure that no bandwidth overbooking
occurs.
In the ABR VS/VD implementation of the ABM-P, BRM cells are inserted within the ACR
for the turn-around of RM cells. Out-of-rate RM cell insertion is supported with the
dummy cell mechanism.
A backward direction connection must be setup. In Bi-directional Mode, the same queue
ID must be chosen in order to make the ABR functions work properly.
Binary ABR marking functions can be performed by programming an appropriate traffic
class in the buffer manager. For ABR explicit rate or VS/VD functions, the ERC unit must
be programmed accordingly for the same QID.
In Uni-directional Mode, the queue ID value with the toggled LSB must be setup for the
backward direction. EFCI marking in forward data cells or CI/NI marking in backward RM
cells can be enabled per traffic class.
Note: Also the LCI is toggled in the Uni-directional Mode (see
4.2.7.5
UBR+ connections are UBR connections with MCR. They must be setup in individual
queues with the weight factor guaranteeing the MCR.
To enhance the overall throughput, the EPD/PPD function is enabled.
4.2.7.6
GFR Connections are setup like UBR+ connections with a Guaranteed Rate in individual
queues, with the weight factor guaranteeing the rate for the high-priority packets. The
threshold for the discard for low-priority packets must be set accordingly.
4.2.7.7
As described in
reserved for UBR connections with the smallest weight assigned. All UBR connections
share this queue. EPD/PPD can be enabled as the relevant parameters are stored per
connection (LCI table).
Data Sheet
Switch Configurations” on Page
UBR+ Connections
GFR Connections
UBR Connections
“Bandwidth Reservation” on Page
62).
152
149, one queue per Scheduler is
Chapter
“LCI Translation in Mini-
Operational Description
4.2.2.7.
PXF 4336 V1.1
2001-12-17
ABM-P
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