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Cisco Broadband Cable Command Reference Guide
OL-1581-07
Chapter 6 Cable CPE Commands
show controllers cable-modem mac
Invalid UCDs
Number of times the router received invalid upstream channel descriptor
(UCD) messages.
Invalid Rng Rsp
Number of times the router received invalid ranging response messages.
Invalid Reg Rsp
Number of times the router received invalid registration response
messages.
T1 Timeouts
Number of timeouts caused by the router not receiving a valid UCD from
the CMTS within the specified time.
T2 Timeouts
Number of timeouts caused by the router not receiving a maintenance
broadcast for ranging opportunities from the CMTS within a specified
time.
T3 Timeouts
Number of timeouts caused by the router not receiving a response within
a specified time from the CMTS to a RNG-REQ message during initial
maintenance.
T4 Timeouts
Number of timeouts caused by the router not receiving a response within
a specified time from the CMTS to a periodic maintenance request.
Range Aborts
Number of times the ranging process was aborted by the CMTS.
DS ID
Identifier of the downstream channel on which this MAC management
message has been transmitted. This identifier is arbitrarily chosen by the
CMTS and is only unique within the MAC-sublayer domain.
DS Frequency
Downstream frequency acquired by the router during its last initialization
sequence.
DS Symbol Rate
Downstream frequency in symbols per second.
DS QAM Mode
Downstream modulation scheme being used by the router.
DS Search
Frequency bands scanned by the router when searching for a downstream
channel. The router’s default frequency bands correspond to the North
American EIA CATV channel plan for 6 MHz channel slots between
90 MHz and 858 MHz.
US ID
Identifier of the upstream channel to which this MAC management
message refers. This identifier is arbitrarily chosen by the CMTS and is
only unique within the MAC-sublayer domain.
US Frequency
Transmission frequency used by the router in the upstream direction.
US Power Level
Transmit power level of the router in the upstream direction.
US Symbol Rate
Upstream frequency in symbols per second.
Ranging Offset
Delay correction (in increments of 6.25 microseconds/64) applied by the
router to the CMTS upstream frame time derived at the router. Used to
synchronize the upstream transmissions in the time division multiple
access (TDMA) scheme, this value is roughly equal to the round-trip delay
of the router from the CMTS.
Mini-Slot Size
Size T of the mini-slot for this upstream channel in units of the timebase
tick of 6.25 microseconds. Allowable values are 2, 4, 8, 16, 32, 64, or 128.
Table 6-13 show controller cable-modem mac state Field Descriptions (continued)
Field
Description