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Configuring
Figure 115 Cisco uBR900 Series Cable Access Router Provisioning Overview
CMTS Interface | Cisco uBR900 series Cable Access Router | |
MAP Broadcast | Power on |
|
Contains timesharing info | Establish synch and wait for UCD | |
Send UCD |
|
|
| Obtain upstream parameters | |
| Use temporary SID | |
| Extract slot info and upstream | |
| channel to use | |
| Start ranging |
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
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 | 18195 |
Note For more detail on the provisioning process, see the DOCSIS 1.0 Radio Frequency
Interface (RFI) specification
After the Cisco uBR900 series cable access router goes online, it begins transferring data between the attached CPE devices and the network (Internet, intranet, VoIP). The cable 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.
Subscriber-End Broadband Access Router Basic Troubleshooting
A
The MAC log file is displayed when you enter the show controllers
The most useful display fields in this output are the reported state changes. These fields are preceded by the message CMAC_LOG_STATE_CHANGE. These fields show how the Cisco uBR900 series progresses through the various processes involved in establishing communication and registration with the CMTS.
The normal operational state is; the normal state when the interface is shut down is wait_for_link_up_state.
Note Because the MAC log file holds only a snapshot of 1023 entries at a time, you should try to display the file within 5 minutes after the reset or problem occurs.
Cisco IOS Multiservice Applications Configuration Guide