Thresholds For Downstream Bandwidth; Overview Of Bonding Group Admission Control; How To Configure, Monitor, And Troubleshoot Service Group Admission Control; Defining Rules For Service Flow Categorization - Cisco cBR 8 Configuration Manual

Overview of Bonding Group Admission Control

Thresholds for Downstream Bandwidth

SGAC monitors downstream bandwidth consumption using the configured maximum reserved bandwidth. It
rejects service flows with a non-zero minimal rate that would make the total reserved bandwidth exceed the
configured threshold.
Flexible Bandwidth Allocation
To address the issue of restricted bandwidth allocation for different application types, admission control can
be applied for both normal priority and emergency voice flows. This is done by extending the threshold and
assigning a group of application types in a fiber node. Each downstream service flow continues to be categorized
for a single application type. However, the one-to-one mapping between an application type and a threshold
no longer exists.
Each configured threshold and its associated group of application types can thus be treated as a constraint. A
service flow categorized to a certain application type must pass all the constraints associated with that
application type.
Overview of Bonding Group Admission Control
DOCSIS 3.0 introduced bonded channels or bonding groups that allow a single cable modem to send data
over multiple RF channels achieving higher throughput. These bonding groups are defined for both upstream
and downstream channels. Bonding groups are created by combining multiple RF channels. A single RF
channel may also be shared by multiple bonding groups.
Note Effective from Cisco IOS-XE 3.18.0SP Release, as per DOCSIS 3.1, if bonding group contains an OFDM
channel, the bonding group's total bandwidth that can be reserved (its capacity), is calculated using the
least efficient OFDM profile it can use.
Bonding group SGAC functionality allows to define the maximum reserved bandwidth for an application-type
as a fraction of the available bandwidth. This fraction of the bandwidth is defined as a percentage value of
the total bandwidth that can be reserved.
How to Configure, Monitor, and Troubleshoot Service Group
Admission Control
Configuration procedures are optional because the default configurations are enabled by default. This section
presents a sequence of procedures for non-default configurations, monitoring and debugging procedures for
both the default or non-default operations of SGAC.

Defining Rules for Service Flow Categorization

This procedure describes how to configure service flow categorization rules on the Cisco CMTS. This flexible
procedure changes default global service flow rules with variations of the cable application type include
command.
Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE
Fuji 16.7.x
106
Service Group Admission Control