3Com MSR 30, MSR 50 manual Service cbr, Example # Set the traffic of VP with vpi 1 to 2M

310CHAPTER 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

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

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-valueand 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.