21-14
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
ATM Connection Flow
Figure 21-4 shows an example of traffic shaping. In this example, port 1 is configured to perform traffic
shaping.
Note that all the ATM cells regardless of class of service pass through the VC queues before leaving the
card when traffic shaping is enabled. In the example, port 2 is not configured for traffic shaping, and
only the ABR traffic with FCES (flow control external segment) passes through the VC queues.
Figure 21-4 Traffic Shaping Example
Traffic Shaping Rates
Traffic shaping rates are listed in Table 21-4.
Configuration
Traffic shaping is disabled by default.
Use the cnfport and cnfln command to enable and disable the function on a per port basis.
Use the cnftrk command to enable traffic shaping on trunks.
No connections should be enabled on the port prior to changing the port traffic shaping parameter. If
there are existing connections when the port is toggled, then these connections will not be updated
unless the card is reset, connections are rerouted, a switchcc occurs, or you modify the connection
parameters.
See the following examples of the cnfln, cnfport, and cnftrk commands:
Traffic
shaping
enabled
Port 1
No traffic
shaping
Port 2
ABR/UBR Qbin
VBR Qbin
CBR Qbin
ABR/UBR Qbin
VBR Qbin
CBR Qbin
12150
VC queues
CBR
CBR
VBR
VBR
UBR
UBR
ABR
ABR
ABR (with FCES)
Table 21-4
Traffic Shaping Rates
Service Type
MCR
PCR
CBR
PCR
PCR
rt-VBR and nrt-VBR
SCR * %Util
PCR
UBR
0
PCR
ABR
MCR * %Util
PCR
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...