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cable dynamic-secret
Displaying Rogue Cable Modems
Use the show cable modem rogue command to display the cable modems that have failed the dynamic
shared-secret authentication checks:
Router# show cable modem rogue
MAC Address
AAAA.7b43.aa7f Vendor1
AAAA.7b43.aa7f Vendor1
BBBB.7b43.aa7f Vendor2
AAAA.7b43.aa7f Vendor1
BBBB.7b43.aa7f Vendor2
AAAA.7b43.aa7f Vendor1
DDDD.7b43.aa7f Vendor4
AAAA.7b43.aa7f Vendor1
Router#
If the CMTS cannot obtain the DOCSIS configuration file from the TFTP server, a message similar to
the following is displayed on the console:
%UBR7200-4-NOCFGFILE: Cannot read modem config file platinum.cm from C3/0: <reason>
where the reason can be one of the following, depending on the error that the TFTP server reported:
•
•
•
•
•
•
Examples
The following example shows how to configure a cable interface on a Cisco uBR7200 series router with
the mark option, so that CMs that fail the MIC verification are allowed to register but are marked in the
show cable modem displays so that their situation can be further investigated:
Router# configure terminal
Router(config)# interface cable 4/0
Router(config-if)# cable dynamic-secret mark
Router(config-if)# exit
Router(config)# exit
Router#
The following example shows how to configure the cable interface on a Cisco uBR7100 series router, so
that CMs that fail the MIC verification are locked with a QoS profile that limits upstream and
downstream service flows to 10 kbps:
Router# configure terminal
Router(config)# cable qos permission create
Router(config)# cable qos permission update
Router(config)# interface cable 1/0
Router(config-if)# cable dynamic-secret lock
Router(config-if)# exit
Router(config)# exit
Router#
Cisco Broadband Cable Command Reference Guide
2-76
Vendor
Interface
C4/0/U5
C4/0/U5
C4/0/U5
C4/0/U5
C4/0/U5
C4/0/U5
C4/0/U5
C4/0/U5
Compression Failed
File too big
Invalid Checksum
Invalid IP address or hostname
Uncompression Failed
User Abort
Chapter 2
Spoof TFTP
Count Dnld Dynamic Secret
2
Yes
45494DC933F8F47A398F69EE6361B017
2
Yes
D47BCBB5494E9936D51CB0EB66EF0B0A
2
No
8EB196423170B26684BF6730C099D271
2
No
DF8FE30203010001A326302430120603
2
No
300E0603551D0F0101FF040403020106
2
Yes
820101002D1A264CE212A1BB6C1728B3
2
Yes
7935B694DCA90BC624AC92A519C214B9
2
No
3AB096D00D56ECD07D9B7AB662451CFF
Cisco CMTS Configuration Commands
OL-1581-08
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