Beta Draft Confidential
12-61/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Traffic Descriptors
About TDs
Table 12-3. QoS Class TDs
QoS Class TD Description
Constant bit
rate (CBR)
(specified/
unspecified)
PCR CLP=0,
PCR CLP=0+1,
tagging
Traffic conformance is based on the PCR of both the
CLP=0 and CLP=0+1 cell streams with Tagging
enabled.
PCR CLP=0,
PCR CLP=0+1,
no tagging
Traffic conformance is based on the PCR of both the
CLP=0 and CLP=0+1 cell streams with no Tagging.
PCR CLP=0+1,
no best effort
Traffic conformance is based only on the PCR of the
CLP=0+1 aggregate cell stream with no Best Effort.
VBR-RT/
VBR-NRT
(specified/
unspecified)
PCR CLP=0+1,
SCR CLP=0,
MBS CLP=0,
tagging
Traffic conformance is based on the PCR of the
CLP=0+1 aggregate cell stream, as well as the SCR
and MBS of the CLP=0 cell stream with Tagging
enabled.
PCR CLP=0+1,
SCR CLP=0,
MBS CLP=0,
no tagging
Traffic conformance is based on the PCR of the
CLP=0+1 aggregate cell stream, as well as the SCR
and MBS of the CLP=0 cell stream with no Tagging.
PCR CLP=0+1,
SCR CLP=0+1,
MBS CLP=0+1,
no tagging
Traffic conformance is based on the PCR, SCR, and
MBS of the CLP=0+1 cell stream with no Tagging.
UBR
(specified/
unspecified)
PCR CLP=0+1,
no best effort
Traffic conformance is based only on the PCR of the
CLP=0+1 aggregate cell stream with no Best Effort.
Best effort No traffic conformance is applied to this cell stream.
A Best Effort attempt is made to deliver all traffic,
but there is no guarantee the switch will not drop
cells due to congestion.
Best effort,
Tagging
Traffic conformance is only applied to tag all cells as
CLP1. A Best Effort attempt is made to deliver all
traffic, but there is no guarantee the switch will not
drop cells due to congestion.
ABR
(unspecified)
PCR CLP=0,
MCR CLP=0
No traffic conformance is applied to this cell stream
unless the logical port User UPC Function or User
NPC Function is set to Enabled with ABR. Traffic
conformance is based on PCR of the CLP=0 cell
stream.
For information about the User UPC Function, see
page 3-32. For information about the User NPC
Function, see page 3-33.
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