Cisco cBR 8 Configuration Guide

the PacketCable normal and high-priority rules are configured for different buckets). If the bandwidth is
available, the call is admitted in the normal priority bucket.
2
If there is no room in normal priority bucket, it preempts a normal priority PacketCable flow and admits
the high priority flow in the bucket where the low priority flow was preempted.
3
If there is no normal priority flow that it can preempt, it rejects the admission for high-priority flow. This
usually happens when both normal and high-priority buckets are filled with 911 flows.
This preemption is effective only for PacketCable high-priority flows.
When a downstream low-priority service flow is chosen for preemption, the corresponding service flow for
the same voice call in the opposite direction gets preempted as well.
Procedure
PurposeCommand or Action
Enables privileged EXEC mode.enable
Step 1
Example:
Router> enable
•
Enter your password if prompted.
Enters global configuration mode.configure terminal
Step 2
Example:
Router# configure terminal
Changes the default Emergency 911 call preemption
functions on the Cisco CMTS, supporting throughput
[ no ] cable admission-control
preempt priority-voice
Step 3
and bandwidth requirements for Emergency 911 calls
above all other buckets on the Cisco CMTS.
Example:
Router(config)# no cable
The no form of this command disables this preemption,
and returns the bucket that supports Emergency 911 calls
admission-control preempt
priority-voice
to default configuration and normal function on the Cisco
CMTS.
Returns to Privileged EXEC mode.Ctrl-Z
Example:
Router(config)# Ctrl^Z
Router#
Step 4
Calculating Bandwidth Utilization
The SGAC feature maintains a counter for every US and DS channel, and this counter stores the current
bandwidth reservation. Whenever a service request is made to create a new service flow, SGAC estimates the
bandwidth needed for the new flow, and adds it to the counter. The estimated bandwidth is computed as
follows:
Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE
Fuji 16.7.x
110
Service Group Admission Control
Calculating Bandwidth Utilization

Cisco cBR 8 Specifications

General

Brand	Cisco
Model	cBR 8
Category	Network Router
Language	English