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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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Chapter4 Troubleshooting the System
Managing Cable Modems on the HFC Network
Sample output:
noisy1#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 down 1000 * * * frequency not set * * * 0 0
Cable3/0/U1 admindown 1000 * * * interface is down * * * 0 0
Cable3/0/U2 admindown 1000 * * * interface is down * * * 0 0
Cable3/0/U3 admindown 1000 * * * interface is down * * * 0 0
Cable3/0/U4 admindown 1000 * * * interface is down * * * 0 0
Cable3/0/U5 admindown 1000 * * * interface is down * * * 0 0
Cable4/0/U0 10.800 Mhz 1000 0 0 ----- 100% 300 0 0
Cable6/0/U0 down 1000 * * * frequency not set * * * 0 0
Spectrum Management Debug and Test Commands
To enable display of frequency hopping debugging messages, enter:
debug cable freqhop
To enable display of spectrum management debugging messages, enter:
debug cable specmgmt
This command also enables display of channel width list and offer list for theshow cable
spectrum-group command.
To force a frequency hop decision on the port or ports, enter:
test cable hop
cable-if
[
upstream portnum
]
Show Cable Hop Command
UsingCisco IOS Release 12.0(5)T1 or higher headend images, youcan use the following command to
obtain specific upstream interface information:
show cable hop
cable-if
[upstream <
portnum
>]