Troubleshooting guide

BSR Troubleshooting Guide
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7. If there is no communication between the TFTP server and the cable interface, the
CM does not have an IP address. Determine if TFTP parameters are set correctly
on the cable interface.
To configure the helper IP address for the cable modems (CMs) to forward only
UDP broadcasts, use the cable helper-address cable-modem command in
Interface Configuration mode, as shown in the following example:
RDN(config-if)#cable helper-address <ip-address> cable-modem
where:
ip-address is the IP address of the destination TFTP server
8. If CMs are registering successfully but there is no Customer Premises Equipment
(CPE) connectivity, the helper IP address for the CPE must be configured. To set
the helper IP address for the CPE behind a CM to forward only UDP broadcasts,
use the cable helper-address host command in Interface Configuration mode, as
shown in the following example:
RDN(config-if)#cable helper-address <ip-address> host
where:
ip-address is the IP address of the destination TFTP server
9. If the DHCP server is operating correctly, but a CM remains unresponsive, reset
the CM so that it can obtain a new IP address.
To reset a CM, use the clear cable modem reset command in Privileged EXEC
mode, as shown in the following example:
RDN#clear cable modem <mac-address> reset
where:
mac-address is the MAC address of the CM
Note: Be sure to correctly enter the CM MAC address in the command. It
may take up to 30 seconds for the CM(s) to respond and start the reset
sequence.