Troubleshooting guide

Troubleshooting the CMTS
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“authentication string” is an alpha-numeric text string specified in double
quotes
0xkey is a key specified in hexadecimal notation
5. To restore the default CM authentication, which is a null value, use the no
cable shared-secret command in Interface Configuration mode, as shown in
the following example:
BSR64000(config-if)#no cable shared-secret [ <“authentication
string”> | <hexidecimal key> ]
6. To verify that CM authentication is activated, use the show running-config
command in Privileged EXEC mode and view the cable interface
configuration information. If CM authentication is active, authentication
information does not appear in the show running-config command output.
BSR64000#show running-config
CM Does Not Reply to Station Maintenance Requests
If a CM does not reply to station maintenance requests after 16 retries, the cable
interface assumes that it is offline. The cable interface marks the CM Service
Identifier (SID) state offline, removes the SID from the ranging list and starts an
aging timer to clear the SID if the CM does not come online within 24 hours.
Follow these steps to solve CM station maintenance registration problems:
1. To identify registration problems concerning CMs connected to the cable
interface, use the show cable modem command in Privileged EXEC mode, as
shown in the following example:
RDN#show cable modem
2. To view the SID status of a CM that is marked offline by the cable interface,
use the show cable modem detail command, as shown in the following
example:
RDN#show cable modem detail [<mac-address> | <slot>/<interface>] <n>
where: