Command Reference Guide

308 ● service vbr-rt 3Com Router 5000 Family and Router 6000 Family
Command Reference
service vbr-rt
Purpose Use the service vbr-rt command to set the service type of PVC to Variable Bit
Rate- Real Time (VBR-RT) and specify the related rate parameters in the PVC view.
Syntax service vbr-rt output-pcr output-scr output-mbs
Parameters output-pcr
Peak cell rate of ATM output in Kbps. For the value
ranges of this parameter, see Table 1.
output-scr
Sustainable cell rate of ATM output in Kbps. Its value
ranges are the same as those of
output-pcr.
output-mbs
Maximum burst size of ATM cell output, that is, the
maximum cache size of ATM cell output at the
interface in cell number. Valid values are 1 to 512.
When it is used in ATM E3 interface, valid values are 1
to 512.
Default By default, the service type is UBR after creating a PVC.
Example Display how to create a PVC named "3Com" with VPI/VCI as 1/101.
[3Com-if-Atm1/0/0] pvc 3Com 1/101
Display how to specify the service type of the PVC as VBR-NRT and set the peak cell
rate of ATM to 100,000kbps, sustainable cell rate to 50,000Kbps, the maximum burst
size to 320 cells.
[3Com-atm-pvc-Atm1/0/0-1/101-3Com] service vbr-rt 100000 50000 320
View This command can be used in the following views:
■ PVC view
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