1-13
Cisco uBR905 Router Hardware Installation Guide
OL-0598-01 (9/2000)
Chapter 1
Product Overview
Functional Overview
Figure 1-6
Cisco uBR905 Cable Access Router Provisioning Overview
Note
For more detail on the provisioning process, see the DOCSIS 1.0 Radio Frequency
Interface (RFI) specification (SP-RFII01-990731 or later revision).
After the Cisco uBR905 router goes online, it sends data traffic between the attached CPE devices and
the network. The service provider typically uses DHCP to assign IP addresses to the CPE devices. The
number of IP addresses each subscriber can obtain depends on the services purchased from the provider.
Provisioning Prerequisites
The following requirements must be met before a router can be provisioned:
•
All required CMTS routing and network interface equipment must be installed, configured, and
operational. This includes all headend routers, servers (DHCP, TFTP, and ToD), network
management systems, and/or other configuration or billing systems required for your network.
•
Based on the quality and capacity of your cable plant, your system administrator or network planner
must have defined your network’s IP address allocation plan; the spectrum management plan
outlining the recommended operating parameters to optimize performance; and the channel plan
identifying the channels available to assign to specific Cisco uBR905 routers.
•
A CMTS customer service representative must have recorded all needed subscriber information,
initiated a work order, and arranged an installation date with the subscriber.
•
The CMTS system administrator or appropriate personnel must have specified the policy
parameters for the Cisco uBR905 router and all computers and other CPE devices to be supported
at the subscriber site. See Cisco’s Network Registrar (CNR) product documentation for more
information.
•
The CMTS system administrator or appropriate personnel must have defined and pushed DHCP and
DOCSIS configuration files to the appropriate servers so that each router, when initialized, can
transmit a DHCP request, receive its IP address, obtain its TFTP and ToD server addresses, and
CMTS Interface
Power on
Establish synch and wait for UCD
Obtain upstream parameters
Use temporary SID
Extract slot info and upstream
channel to use
Start ranging
Transmit ranging packet with SID
DHCP request/TFTP boot request
Now in allocated slots
ToD Request
Registration Request
Send QoS Parameters
Now in allocated slots
Cisco uBR900 series online
MAP Broadcast
Contains timesharing info
Send UCD
DHCP Response:
Contains IP addresses
Default gateway, TOD server
TFTP server address
TFTP boot config file name
ToD Response
Registration Response
Contains Assigned SID
Cisco uBR900 series registered
Fail if QoS not available
or authentication failed
Cisco uBR900 series Cable Access Router
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