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Feature Overview
22
Cisco IOS Release 12.0(7)T
The sequence numbers shown in Table 3 are also shown in Figure 5 below. The Cisco uBR900 series
cable access router will complete all the steps shown in the table and flowchart each time it needs to
reregister with the CMTS.
Figure 5 Cable Modem Initialization Flowchart
Register with
the Cisco
uBR7246
Registration
complete
Power
on
Scan for
downstream
channel
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
Transfer
operational
parameters
Transfer
complete
Baseline
privacy
initialization
Baseline
privacy
initialized
Operational
1
2
3
4
5
6
7
8
9
10
12960
Downstream
sync
established
Security
established