Cisco uBR10-SRP-OC12SML Especificações descarregar pdf (Página 182)

4-8

Cisco uBR10012 Universal Broadband Router Software Configuration Guide

OL-1520-05

Chapter4 Managing Cable Modems on the Hybrid Fiber-Coaxial Network

Configuring the Dynamic Map Advance Algorithm

Tip System defaults are to have dynamic ranging interval enabled, dynamic ranging backoff enabled, and

fixed data backoffs for each upstream of a cable interface.

The default automatic insertion interval setting enables the Cisco automatic initial ranging period

algorithm, where lower and upper default values of 50 msecs and 2 secs are used. The default

automaticrange-backoff setting enables the dynamic backoff algorithm.

Configuring the Dynamic Map Advance Algorithm

A CMTS administrator can enhance the upstream throughput from a CM connected to the

CiscouBR10000series 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.

Caution Only a trained CMTS administrator should adjust these values.

Command Purpose

[no] cable

insertion-interval

[automatic [Imin [Imax]]] |

[msecs]

cable insertion-interval

automatic min 25-2000

cable insertion-interval

max 500-2000

no cable insertion-interval

cable insertion-interval

100-2000

Enables or disables the dynamic ranging interval algorithm. If lower

and upper bounds for varying the period are not specified, the

system uses default frequency values of initial ranging upstream

slots between 50 milliseconds to 2 seconds, respectively.

Sets the lower bound on the initial ranging period for the automatic

ranging algorithm.

Sets the upper bound on initial ranging period for the automatic

ranging algorithm.

Resets fixed initial ranging period to default value of 500 msecs.

Also invokes fixed initial ranging algorithm.

Enables fixed initial ranging period algorithm with specified fixed

period (msecs).

1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 235 236

Sem comentários

Cisco uBR10-SRP-OC12SML Especificações Página 182