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310 CHAPTER 19: ATM CONFIGURATION COMMANDS
When applying VP policing, the parameters of PVC are still valid. Only when the
parameters of PVC and VP policing are satisfied, will the packets be transmitted
and received. In calculating the traffic, the LLC/SNAP, MUX and NLPID headers are
included, but the ATM cell head is not included.
Related command: pvc, service cbr, service vbr-nrt, service vbr-rt, service ubr.
Example # Set the traffic of VP with vpi 1 to 2M.
<Sysname> system-view
[Sysname] interface atm 1/0
[Sysname-Atm1/0] pvp limit 1 2000
service cbr
Syntax service cbr output-pcr [ cdvt cdvt-value ]
View PVC view/ATM Class view
Parameter output-pcr: Output peak rate of ATM cell in kbps. The value range of this
parameter varies with interface type, as shown in the following table
cdvt-value: cell delay variation tolerance, in μs. The effective range is 0 to 10,000
and the default is 500 μs. This argument cannot be configured in ATM Class view.
Description Use the
service cbr command to specify PVC service type as constant bit rate
(CBR).
By default, the service type is UBR after creating a PVC.
You can use this command to set the PVC service type and the rate parameter. The
newly specified PVC service type will replace the existing service type. You are
recommended to create the PVC with larger bandwidth first and then the one
with smaller bandwidth. If the creation fails, you can increase the cdvt-value and
try to create the PVC again. In the command line, the system will prompt you on
this, as follows:
"fail to set service parameter, please adjust cdvt value"
The command is not applicable to ATM E1 interfaces and ATM E3 interfaces.
Table 30 Value ranges of output-pcr
Interface type Value range of output-pcr
ADSL 64 to 640
G.SHDSL For two-wire interfaces or four-wire interfaces in two-wire
mode: 64 to 2,312
For four-wire interfaces: 128 to 4,624
ATMOC3 64 to 155,000
ATME3 64 to 34,000
ATMT3 64 to 44,000