Step 1—Understand How Basic Initialization Works

Figure 2

Cable Modem Initialization Flowchart

Power

on

1

2

3

4

5

Scan for

downstream

channel

Downstream

sync

established

Obtain

upstream

parameters

Upstream parameter acquired

Start

Ranging

Ranging and

auto adjust completed

Establish

IP

connectivety

IP

complete

Establish

time of

day

Time of day established

Establish

security

Security

established

Transfer

operational parameters

Transfer complete

Register with

the Cisco uBR7246

Registration

complete

Baseline

privacy

initialization

Baseline

privacy

initialized

Operational

6

7

8

9

10

12960

Troubleshooting Tips for the Cisco uBR924 Cable Access Router 9

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Cisco Systems UBR924 manual 12960