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show cable modem
Table 3-14 Descriptions for the show cable modem Fields (continued)
Field
Prim SID
RxPwr, Received
Power
Timing Offset and
Initial Timing Offset
Num CPEs, CFG
Max-CPE
Number of CPE IPs
Ver, MAC Version
QoS Prov, QoS
Provisioned Mode
Enable DOCSIS 2.0
Mode
Cisco Broadband Cable Command Reference Guide
3-58
Description
The primary SID assigned to this CM.
The average power in dBmV for the upstream channel symbol rate for the CM.
With default settings, 0 dBmV is considered optimal, but a range of -1 to 1
dBmV is allowable. When CMs exceed this range, older Cisco IOS releases
supported a drop to as low as -2 dBmV. Recent Cisco IOS releases support a
drop to as low as -4 dBmV.
This field supports a resolution of 0.25 dBmV, but the dB resolution level for
CMs and for the Cisco CMTS are slightly higher—approximately 1.0 and 1.4 dB.
An asterisk (*) in the RxPwr column indicates that a power
Note
adjustment has been made for that CM. An exclamation point (!)
indicates that the CM has reached its maximum power transmit level
and cannot increase its power level further.
The timing offset for the CM, in ticks, as recognized on the CMTS. (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.
Note
An exclamation point (!) in the Timing Offset column indicates that
the CM has exceeded the maximum delay and timing offset specified
by the
cable map-advance
Note
The timing offset shown here is typically smaller than the TX Time
Offset value shown by the
command, because the latter value is the offset as recognized on the
CM (which will include any internal delay between when the CM
software begins the transmission and when the bits actually appear on
the local cable interface).
Indicates the number of CPE devices for which the CM is providing services.
Indicates the maximum number of IP addresses assigned to CPE devices
behind this CM, as configured by the
Displays the maximum supported version of DOCSIS that the CM supports
(DOCSIS 1.0, DOCSIS 1.1, DOCSIS 2.0).
Displays the version of DOCSIS that the CM currently is provisioned for
(DOCSIS 1.0, DOCSIS 1.1, DOCSIS 2.0).
Indicates whether the CM is capable of DOCSIS 2.0 (ATDMA) operation, as
determined by the presence and value of the Enable 2.0 Mode (TLV39) field
in the CM's Registration Request message or in the DOCSIS configuration
file. The valid values are:
•
Y = TLV 39 was set to 1, indicating that the CM has enabled DOCSIS 2.0
mode. The CM could still be registered for DOCSIS 1.1 operations,
however, on DOCSIS 1.X interfaces.
N = Either the TLV 39 field was not present in the CM's Registration
•
Request message, indicating that the CM is not capable of DOCSIS 2.0
operations, or the TLV 39 field was set to 0 in the DOCSIS configuration
file, preventing the CM from using the DOCSIS 2.0 mode.
Chapter 3
Cisco CMTS Show Commands
command.
show cable modem remote-query
cable max-hosts
command.
OL-1581-08
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