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255-700-447
C-3
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix C Reference Information
ATM Traffic Descriptors
~
When the connection is configured for variable bit rate (VBR) traffic, the
PSAX system tags all CLP=0 cells violating the value set for the SCR to
CLP=1 in bucket 2.
~
When the connection is configured for constant bit rate (CBR) traffic, the
PSAX system tags all CLP=0 cells violating the value set for the PCR to
CLP=1 in bucket 2.
The network then might drop some or all cells during congestion.
Traffic Shaping Priorities by Configured Feature on PSAX Modules
Table C-1 shows how traffic processing is implemented on the ingress and
egress sides of ATM interfaces on those modules that support ATM interfaces.
Table C-1. Traffic Processing Options and Priority Queuing for Modules Supporting ATM Interfaces
ATM Interface Modules
Interport
Shared
Buffer
*
Ingress Traffic
Processing Priority
Queuing
†
Egress Traffic Processing
Priority Queuing
†
23N72
1-Port OC-12c/STM-4c
Multimode
23N73
1-Port OC-12c/STM-4c
Single-Mode
1
UPC, AQueMan
‡
,
GFR
TM 4.1 priority queuing
§
,
Per VC traffic shaping, or VI
support
¶
,
EPD
**
24N72
4-Port OC-3c/STM-1
Multimode
24N73
4-Port OC-3c/STM-1
Single-Mode
4
UPC, TM4.1
TM 4.1 priority queuing,
Per VC traffic shaping, or VI
support
¶
,
EPD
20N92
1-Port STM-1 1+1 MSP
Multimode
20N93
1-Port STM-1 1+1 MSP
Single-Mode
1
††
UPC, AQueMan
AQueMan
‡‡
,
Per VC traffic shaping, or VI
support
¶
,
EPD
**
20N72
1-Port OC-3c 1+1 APS
Multimode
20N73
1-Port OC-3c 1+1 APS
Single-Mode
1
††
UPC, AQueMan
AQueMan
‡‡
,
Per VC traffic shaping, or VI
support
¶
,
EPD
**
23N74
3-Port DS3/E3 ATM
3-Port DS3/E3 ATM Protection
No
UPC, AQueMan
TM 4.1 priority queuing
§
,
Per VC traffic shaping, or VI
support
¶
,
EPD
**
20N02
2-Port DS3 ATM
20N22
2-Port E3 ATM
Yes
§§
AQueMan
AQueMan
‡
,
EPD
**
23N68
1-Port DS3 IMA
N/A
AQueMan
AQueMan
‡
,
EPD
**
23N60
1-Port Channelized DS3
Multiservice
23N62
1-Port Channelized STS-1e,
T1 Format
N/A
UPC, AQueMan
AQueMan
‡
,
EPD
**
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