pxf4333 Infineon Technologies Corporation, pxf4333 Datasheet - Page 63
pxf4333
Manufacturer Part Number
pxf4333
Description
Abm 3g Atm Buf Fer Manager
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PXF4333.pdf
(361 pages)
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Scheduler Blocks are usually assigned to ports, logical channels, or limited terminated
VPCs, providing the necessary rate adaptation.
SB occupancy thresholds are provided for buffer protection in case of SB overload.
3.4.1.2.4 Traffic Classes
The concept of traffic classes is introduced to provide a logical grouping of queues with
common properties, defined by a set of parameters. Each logical queue is
unambiguously assigned to a traffic class and inherits the thresholds and flags defined
therein.
The Buffer Manager supports up to 16 distinct parameter sets for traffic classes in the
Traffic Class Table (TCT). Each parameter set includes thresholds and flags as listed in
Chapter
Figure 3-16
to traffic classes and schedulers.
Figure 3-16 Queue Assignment to Traffic Classes and Scheduler Blocks
Traffic classes are the principal buffer management concept for Quality of Service (QoS)
differentiation. They are not pre-defined or fixed to the standard ATM service categories.
This allows for configuration of generic or new services (e.g. DiffServ Per Hop Behaviors
(PHB) as defined by the IETF). Along with the queue scheduler concept of scheduler
blocks (see
Data Sheet
3.4.1.3.
Section
shows the independent assignment connections to queues and of queues
3.4.2.2), a wide range of QoS objectives can be met.
T r a f fic
c la s s 0
V ir tu a l C o n n e c tio n to Q u e u e M a p p in g
Q u e u e to S c h e d u le r M a p p in g
Q u e u e to T r a ffic C la s s M a p p in g
T ra ffic
c la s s 1
63
Section 3.4.3
T r a ff ic
c la s s 1 5
provides the details.
Functional Description
S c h e d u le r
S c h e d u le r
B lo c k 1 2 7
B lo c k 0
PXF 4333 V1.1
2001-12-17
ABM-3G
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