Cisco Systems uBR7200 Series manual

Chapter 4 Troubleshooting the System

Understanding Show Command Responses

Note * means the noise power adjustment method is active for this modem; ! means the modem has reached its maximum transmit power

•The QoS column contains the service class assigned to the modem

•The CPE column identifies the number of devices behind the modem

•The Max CPE column identifies the maximum number of devices configured for the modem

•The IP address reveals the modem’s IP address

•The MAC address reveals the modem’s MAC address

•The Concatenation column reveals if concatenation is enabled (yes) or disabled (no)

•The Rx SNR column reveals the SNR ratio level in dBmV as perceived by the cable modem

Note This parameter is only meaningful for cable modems. A CMTS will return a zero.

•The S/N Ratio column provides values for remote-queried modems.

•The US Power column reveals the transmit power level for the upstream channel in dBmV.

•The DS Power column reveals the received power level at the downstream modem in dBmV.

Note If the power level measurement is not supported, set this parameter to zero. Also, if the interface is down, this value will be the CMTS-configured value, the most current CM value, or zero.

•The Tx Timing Offset shows the current round trip time at the CM. The value is used to synchronize upstream transmission to the CMTS and is measured in units of 6.25 microseconds.

•The Micro (dB) Reflection column is the total microreflections including in-channel response as perceived on this interface, measured in Dbc below the signal level.

Note The value is not assumed to return an absolutely accurate value, but gives a rough indication of microreflections received on this interface.

•The Offline Time column reveals when a modem went offline.

•The Previous State column reveals the modem’s status prior to going offline. See the modem ranging states given earlier.

•The Rx Power column reveals the last receive power measurement for a modem that is offline before it went offline.

•SM Exhaust Count reveals the number of times the CMTS declared that modem offline. The modem can be marked offline for various reasons. Refer to Show Cable Modem Maintenance, page 4-23.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

78-5897-01 4-21