Specifications

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Cisco Cable Modem Termination System Feature Guide
0L-1467-02
Chapter 3 Spectrum Management for the Cisco Cable Modem Termination System
Configuration Tasks
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 8
Minislot Size in Symbols = 64
Bandwidth Requests = 0x12
Piggyback Requests = 0x5
Invalid BW Requests= 0x0
Minislots Requested= 0xFA
Minislots Granted = 0xFA
Minislot Size in Bytes = 32
Map Advance (Dynamic) : 2454 usecs
UCD Count = 230
DES Ctrl Reg#0 = C000C043, Reg#1 = 0
Dynamic Services Stats:
DSA: 0 REQs 0 RSPs 0 ACKs
0 Successful DSAs 0 DSA Failures
DSC: 0 REQs 0 RSPs 0 ACKs
0 Successful DSCs 0 DSC Failures
DSD: 0 REQs 0 RSPs
0 Successful DSDs 0 DSD Failures
DCC: 0 REQs 0 RSPs 0 ACKs
0 Successful DCCs 0 DCC Failures
CMTS#
Note In the above example, upstream 0 displays “CNR - Unknown - no modems online” to indicate that the
CNR value has not yet been calculated because no cable modems have come online for that particular
upstream yet.
Step 4 To display the hop period and hop threshold values for each upstream, use the show cable hop in
privileged EXEC mode command:
CMTS# show cable hop
Upstream Port Poll Missed Min Missed Hop Hop Corr Uncorr
Port Status Rate Poll Poll Poll Thres Period FEC FEC
(ms) Count Sample Pcnt Pcnt (sec) Errors Errors
Cable3/0/U0 20.800 Mhz 105 0 20 0% 25% 45 1 4
Cable3/0/U1 20.800 Mhz 105 0 48 0% 25% 45 2 19
Cable3/0/U2 23.120 Mhz 105 0 45 0% 25% 45 0 5
Cable3/0/U3 22.832 Mhz 105 0 26 0% 25% 45 0 6
Cable3/0/U4 22.896 Mhz 105 0 43 0% 25% 45 0 7
Cable3/0/U5 23.040 Mhz 105 0 54 0% 25% 45 1 3
Cable4/0/U0 22.896 Mhz 117 0 26 0% 25% 45 0 2
Cable4/0/U1 23.168 Mhz 117 0 87 0% 25% 45 4 2
Cable4/0/U2 22.896 Mhz 117 0 23 0% 25% 45 1 0
Cable4/0/U3 20.800 Mhz 117 0 54 0% 25% 45 0 0
Cable4/0/U4 22.928 Mhz 117 0 22 0% 25% 45 0 1
Cable4/0/U5 22.960 Mhz 117 0 0 ----- 25% 45 0 0
CMTS#
Step 5 To display the assignment of each spectrum group, use the show cable spectrum-group command in
privileged EXEC mode:
CMTS# show cable spectrum-group
Group Frequency Upstream Weekly Scheduled Power Shared
No. Band Port Availability Level Spectrum
(Mhz) From Time: To Time: (dBmV)
1 20.000-21.600 0 No
1 22.000-24.000 0 No
1 20.784 [1.60] Cable3/0 U0 0
1 20.784 [1.60] Cable3/0 U1 0