Cisco Broadband Cable Command Reference Guide

Chapter 2 Cisco Cable Modem Termination System Commands
OL-1581-05
Table 2-28 show controllers cable upstream Command Field Descriptions (continued)
Cisco Broadband Cable Command Reference Guide
show controllers cable
Field Description
Tx Timing Offset Indicates the largest ranging offset reported by CMs on the
upstream.
Ranging Backoff Start Indicates how many ranging slots to back off before resending the
ranging bursts after an upstream collision. Expressed as exponents
of 2. Also see Ranging Backoff End.
Ranging Backoff End Indicates how many ranging slots to back off before resending the
ranging bursts after an upstream collision. Expressed as exponents
of 2. Also see Ranging Backoff Start.
Tx Backoff Start Indicates the starting exponential backoff value for data collisions.
Tx Backoff End Indicates the ending exponential backoff value for data collisions.
Modulation Profile Group A set of burst profiles defining an upstream range.
part_id= The part number of the PHY chip. FFFF means the PHY chip is
turned off.
rev_id= The PHY chip revision number.
rev2_id= The PHY chip subrevision number.
nb_agc_thr= Threshold used to control gain.
nb_agc_nom= Used to accelerate convergence of input power level.
Range Load Reg Size= Size, indicated by number of symbols, for range request bursts.
Request Load Reg Size= Size, indicated by number of symbols, for request bursts.
Minislot Size in number of
Timebase Ticks is
Size in tick units of upstream minislot. A tick is 6.25 microseconds.
Minislot Size in Symbols Size in symbols of the upstream minislot.
Bandwidth Requests Number of successful bandwidth requests received in the
contention minislots.
Piggyback Requests Number of successful bandwidth requests piggybacked with
regular data transmissions.
Invalid BW Requests Number of invalid bandwidth (BW) requests. (An example of an
invalid bandwidth request is a modem using a nonexistent service
identifier (SID) to request bandwidth.
Minislots Requested Total number of minislots requested.
Minislots Granted Total number of minislots granted.
Minislot Size in Bytes Size of the minislot in bytes.
UCD Count Number of Upstream Channel Descriptors (UCDs) sent for this
upstream.
DES Ctrl Reg # = Interval data encryption standard (DES) controller register dump.
The following is sample output for the downstream connection for slot 3 on port 0 on Cisco CMTS router
from the show controllers cable downstream command:
CMTS01# show controllers cable 3/0 downstream
Cable 3/0 Downstream is up
2-403