Cisco Cisco IOS Software Release 12.1(7)CX

You can use both the Cisco IOS CLI and SNMP managers to monitor the Cisco uBR-MC16S Spectrum 
Management Feature Enhancements. The DOCSIS Cable Modem Test Analyzer (DCMTA), available 
from Acterna Corporation, also provides a graphical interface for live troubleshooting of an individual 
upstream or cable modem. 

The following commands provide information on the spectrum condition of an upstream:

SNMP can also be used to monitor the spectrum on each upstream on the Cisco uBR-MC16S line card. 
The CISCO-CABLE-SPECTRUM-MIB MIB has been enhanced to provide the following MIB 
attributes:

 lists the attributes in the ccsSNRRequestTable, which contains the CNR measurements that are 

made for individual cable modems on an upstream:

Router# show cable modem [ip-address | 
interface | mac-address] [options] 

Displays information, including CNR values, for the 
registered and unregistered cable modems. See 

Router# show cable spectrum-group 
[groupnum] [detail] 

Displays information about the spectrum groups that have 
been configured. See 

. 

Router# show controllers cable x/y 
upstream n [ ip-address | mac-address ] 
start-freq end-freq res-freq 

Displays the noise levels for a particular cable modem, or 
displays the background noise for an entire upstream. See 

. 

ccsSNRRequestIndex

Integer32

Arbitrary index to unique identify each table 
entry. 

ccsSNRRequestMacAddr

MacAddress

MAC address of the remote online cable modem 
being reported on.