Table of Contents
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show cable modem remote-query
Router#
Table 3-30
Table 3-30 Descriptions for the show cable modem remote-query Fields
Field
IP Address
MAC Address
S/N Ratio
US Power
DS Power
TX Time Offset
Micro (dB) Reflection
Modem State
The following example shows typical output from the show cable modem remote-query command.
Router# show cable modem remote-query
IP address
10.118.4.194
10.118.4.156
Router#
The following example shows typical output from the show cable modem remote-query command
when the remote-query feature has not been configured.
Router# show cable modem remote-query
Cisco Broadband Cable Command Reference Guide
3-114
shows the fields displayed by the show cable modem remote-query command.
Description
The IP address that the DHCP server has assigned to the CM.
The MAC address for the CM.
The current signal-to-noise ratio (SNR) on the downstream, as seen by the
CM.
The current operational transmit power level, in dBmV, as seen by the CM.
The received power level, in dBmV, as seen by the CM. This field is set to
zero if the CM does not support power level measurements.
The timing offset for the CM, in ticks, as recognized on the CM. (A tick, as
used here, is 6.25/64 microseconds.) This is the delay between when a
particular cable modem is scheduled to make a transmission and when the
CMTS actually receives it. The CM value includes any internal delay between
when the CM software begins the transmission and when the bits actually
appear on the local cable interface.
Note
The timing offset shown here is typically larger than the Time Offset
value shown by the
value is the offset as recognized on the CMTS (which does not
include the internal delay on the CM).
The approximate number of total microreflections (including in-channel
responses) on the downstream, measured in dBc below the signal level, as
seen by the CM. Microreflections are a type of impairment that is caused by
impedance mismatches between amplifiers, couples, cables, and other
equipment in the cable plant. Microreflections create copies of a signal that
arrive at the receiver with different amounts of delay and attenuation,
generating intersymbol interference (ISI) that can cause the receiver to
improperly detect the amplitude and phase of the incoming signal.
Note
This value is not exact but provides an approximate indication of the
microreflections that have been received.
The current state of the MAC layer for the CM (see
MAC address
S/N
Ratio
0007.0e04.5ba9
33.4
0003.6b1b.e8c9
34.0
Chapter 3
show cable modem
US
DS
Tx Time Micro (dB) Modem
Power
Power Offset
Reflection State
42.3
- 1.0
8794
1
44.0
- 1.0
8795
3
Cisco CMTS Show Commands
command, because the latter
Table 3-15 on page
3-60).
online
online(d)
OL-1581-08
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