Cisco 7246VXR - uBR Router Software Configuration Manual page 80

Supported Software Features for the Cisco uBR7200 Series
Dynamic Map-Advance
A CMTS administrator can enhance the upstream throughput from a cable modem connected to the
Cisco Cisco uBR7200 series CMTS. The system employs a new algorithm that automatically tunes the
lookahead time in MAPs, based on several input parameters for the corresponding upstream channel.
The use of dynamic and optimal lookahead time in MAPs significantly improves the per-modem
upstream throughput.
For configuration information, refer to
page
Dynamic SID Support
For additional feature information, refer to the document titled
Enhancements for Voice and Fax Calls: DOCSIS 1.0+
Fragmentation (Layer 2)
Layer 2 fragmentation on the upstream prevents large data packets from affecting real-time traffic, such
as voice and video. Large data packets are fragmented and then transmitted in the time slots that are
available between the time slots used for the real-time traffic.
Multiple SID Support
This feature consists of changes made to various show commands to expand service identifier (SID)
information.
•
•
For additional information, refer to Multiple Service ID Support for the Cisco uBR7200 Series Cable
Router on Cisco.com:
Payload Header Suppression (PHS)
Payload Header Suppression (PHS) conserves link-layer bandwidth by suppressing unnecessary packet
headers on both upstream and downstream traffic flows.
To configure PHS, refer to the
page
DOCSIS 1.1 for the Cisco uBR7200 Series Universal Broadband Routers feature module on Cisco.com:
QoS Configuration
QoS configuration information is now included in the Cable Modem Database Manager, which is
described further in the document titled DOCSIS 1.1 for the Cisco uBR7200 Series Universal Broadband
Routers feature module on Cisco.com:
QoS Profile Enforcement
This feature allows CMTS operators to override the provisioned service class of a cable modem at the
time of registration with a CMTS local-static quality of service (QoS) profile. CMTS operators can
control the QoS from the CMTS and eliminate any interference from improper local-rate limiting
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
1-62
5-7.
The show cable modem command has been changed to indicate that the SID shown is the primary
SID for each cable modem.
The show interface cable command has been updated to include the secondary SIDs for each cable
modem.
http://www.cisco.com/en/US/docs/ios/12_0t/12_0t5/feature/guide/multisid.html
3-33. For additional information about configuring these and other DOCSIS features, refer to the
http://www.cisco.com/en/US/docs/cable/cmts/feature/DOCSIS11.html
http://www.cisco.com/en/US/docs/cable/cmts/feature/DOCSIS11.html
"Configuring the Dynamic Map Advance Algorithm" section on
on Cisco.com.
"Configuring Payload Header Suppression and Restoration" section on
Chapter 1 Overview of Cisco uBR7200 Series Software
Cisco uBR7200 - QoS/MAC
OL-2239-05