Cisco 10000 Series User Manual

17-5
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 17 Configuring Dynamic Subscriber Services
Applying Traffic Shaping Parameters Using RADIUS Profiles
Usage Guidelines for the default dbs enable Command
The default dbs enable command is not nvgenned and does not appear in the output of the
show
running-config command when configured.
Use the default dbs enable command to remove the dbs enable command or the no dbs enable
command from a configuration. For example, in the following configuration we enable DBS on
PVC
1/55:
Router(config)# interface atm 6/0/0.600 point-to-point
Router(config-if)# pvc 1/55
Router(config-if-atm-vc)# dbs enable
Router(config-if-atm-vc)# encapsulation aal5mux ppp Virtual-Template1
Router(config-if-atm-vc)# end
We later decide to change the PVC configuration so that a VC class is applied to the PVC. The
configuration of the VC class, named vc-test, includes the dbs enable command. Therefore, we must
remove the dbs enable command from the PVC configuration by using the default dbs enable
command.
The default dbs enable command removes the dbs enable command from the PVC configuration, as
shown in the following configuration, but it does not remove the ability to do DBS under the VC class.
Notice that the default dbs enable command also does not appear in the PVC configuration.
vc-class atm vc-test
vbr-nrt 505 505
dbs enable
encapsulation aal5mux ppp Virtual-Template1
!
interface ATM6/0/0.600 point-to-point
pvc 1/55
class-vc vc-test
PCR and SCR Parameters for Multiple Sessions on a VC
DBS selects the PCR and SCR parameters for a VC on which multiple PPPoE sessions are allowed and
applies the parameters to the VC. The RADIUS profile values for the first user on a VC override the
default values of the VC. At any time, DBS selects the PCR and SCR values that are the highest of all
the sessions. Adding and removing sessions from the VC can result in changes in the PCR and SCR
parameters.
If users already exist on the VC, each new value overrides the existing configuration only if the value is
higher than the existing value. If the selected PCR value is higher than available bandwidth, DBS applies
the highest value supported on the VC. If the PCR is less than the minimum PCR supported on a VC,
DBS applies the minimum supported value.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English