Juniper Networks G10 CMTS manual ServiceGuard Management System

Features for Troubleshooting

! show cable modem unregistered—Display a list of unregistered cable modems and		•
associated operational parameters.		•
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! show chassis environment—Display environmental information about the CMTS		•
chassis, including the temperature of each DOCSIS Module, temperature thresholds, and		•
fan and power supply status.		•
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See the JUNOSg Software Operational Mode Command Reference for more information about		•
these commands.		•
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ServiceGuard Management System		•
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	The ServiceGuard Management System is an optional tool
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	that is not part of the standard G10 CMTS shipment. A	•
	ServiceGuard Management System application must be	•
	purchased to take advantage of this powerful diagnostic	•
	aid.	•
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You can perform spectrum monitoring of the HFC return path by using the ServiceGuard		•
Management System. The ServiceGuard Management System provides a headend technician		•
with an integrated tool to monitor and analyze the return path network performance at the		•
G10 CMTS by collecting measurements gathered by the Broadband Cable Processor ASIC,		•
processing them into useful statistical information, and presenting them graphically. Statistics		•
that you can be measure and plot within the ServiceGuard Management System include		•
noise power and noise power density, signal-to-noise ratio (SNR), modulation error		•
rate (MER), and codeword error rate (CER).		•
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The ServiceGuard Management System incorporates an integrated impairment identification		•
tool that monitors statistics to characterize compromised performance to a potential cause		•
(such as impulse or burst noise, narrowband ingress, or microreflections).		•
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This application allows you to recognize, identify, and troubleshoot issues with the return		•
path. In addition, you can use this application to map and allocate spectrum for upstream		•
interfaces.		•
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Troubleshooting 147