Command Reference Guide

302 ● service cbr 3Com Router 5000 Family and Router 6000 Family
Command Reference
service cbr
Purpose Use the service cbr command to specify PVC service type as constant bit rate
(CBR).
Syntax service cbr output-pcr [ cdvt cdvt_value ]
Parameters output-pcr
Output peak rate of ATM cell in kbps. Value range of
this parameter depends on interface type, as shown in
the following table.
cdvt_value
cell delay variation tolerance, in ìs, and the range of
the value is 0 to 10000 ìs.
Default By default, the service type is UBR after creating a PVC. When the value of cdvt is not
specified, it is 500ìs by default.
Example Create a PVC named "3Com" with VPI/VCI as 1/101.
[3Com-Atm1/0/0] pvc 3Com 1/101
Specify the service type of the PVC as cbr and the peak rate of ATM cell as
50,000Kbits/s.Cell delay variation tolerance is 1000ìs.
[3Com-atm-pvc-Atm1/0/0-1/101-3Com] service cbr 50000 cdvt 1000
View This command can be used in the following views:
■ PVC view
Description Use the service cbr command to specify PVC service type as constant bit rate
(CBR).
Table 1 Value ranges of output-pcr
Interface type output-pcr
ADSL 64 to 640
GSHDSL For two-wire interfaces or four-wire interfaces in two-wire mode: 64
to 2312
For four-wire interfaces: 128 – 4624
ATMOC3 64 to 155000
ATM25 64 to 25600
ATME3 64 to 34000
ATMT3 64 to 44000
IMA-E1/T1 64 to 1904