Motorola BSR 2000, Руководство по настройке и управлению

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Release 1.0 Configuring the CMTS
526360-001-00 Rev. B MGBI 6-107
Modifying Service Class Parameters
Follow these options to make adjustments to service class parameters for either a
default service class or a created service class:
■
Configured Active Percent (CAP) is used to estimate the percent of service flows
which are likely to be simultaneously active since all service flows are not active
simultaneously. Use the
cap command in Cable Service Class mode to specify the
amount of over-booking for a service class:
MOT(config-srvclass)#
cap <
WORD
> <
0-100
>
where:
WORD
is the service class name.
0-100
is the percent of service flows belonging to this service class that can
be simultaneously active on an interface.
For example, if the CAP for a service class is set to 20 percent then 5 X (1 / 0.2)
overbooking would be allowed. If set to 100 percent then no overbooking would
be permitted. If set to 0 then unlimited overbooking would be permitted.
■
Scheduling priority determines the order in which service classes are serviced.
All service flows belonging to a service class with a higher scheduling priority
are serviced before service flows belonging to service classes with a lower
scheduling priority. Use the
schedpriority command in Cable Service Class
mode to assign a scheduling priority to the service class that you are configuring:
Note: CAP can be specified for a service class that has a minimum reserved
traffic rate. Overbooking for UGS classes is not permitted. The CAP
parameter is fixed at 100 percent. The CAP parameter for UGS-AD classes
may not be set to less than 80 percent (25 percent overbooking).
Note: The scheduling priority is different from the traffic priority DOCSIS QoS
parameter that is specified to characterize a priority for service flows that
have identical QoS parameter sets.