Specifications

3-50
Cisco Cable Modem Termination System Feature Guide
0L-1467-02
Chapter 3 Spectrum Management for the Cisco Cable Modem Termination System
Monitoring Spectrum Management
12 15.000-20.000 0 No
13 15.000-20.000 0 No
14 15.000-20.000 0 No
14 24.000-29.000 0 No
14 15.792 [1.60] Cable6/1/0 U0 0
15 15.000-20.000 0 No
16 20.000-21.600 0 No
17 30.000-33.000 0 No
17 30.000-33.200 0 No
19 30.000-34.000 0 No
19 20.000-24.000 0 No
19 10.000-14.000 0 No
20 20.000-24.000 0 No
22 20.000-30.000 0 No
22 25.936 [1.60] Cable6/1/0 U1 0
22 26.192 [1.60] Cable6/1/0 U2 0
22 26.480 [1.60] Cable6/1/0 U3 0
22 20.784 [1.60] Cable6/1/0 U4 0
22 23.984 [1.60] Cable6/1/0 U5 0
CMTS#
Step 6 To display the current CNR value for a particular cable modem, use the show cable modem cnr
command in privileged EXEC mode:
CMTS# show cable modem 10.240.179.234 cnr
MAC Address IP Address I/F MAC Prim CNR
State Sid (db)
0020.40bc.3588 10.240.179.234 C3/0/U2 online 2 38.0
CMTS# show cable modem 10.240.179.51 cnr
MAC Address IP Address I/F MAC Prim CNR
State Sid (db)
0020.40ef.4be0 10.240.179.51 C3/0/U5 online 11 39.5
CMTS#
Monitoring Spectrum Management
You can use Cisco IOS CLI commands to monitor spectrum management activity on the Cisco CMTS.
If you are using Cisco IOS Release 12.2(8)BC2 or later 12.2 BC releases, and the Cisco uBR-MC16S
cable interface line card, you can also use SNMP to monitor the spectrum management activity. See the
following sections for more information:
• Using CLI Commands, page 3-51
• Using SNMP, page 3-51
• Using the DOCSIS Cable Modem Test Analyzer, page 3-55