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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
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Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software Supported Software Features for the CiscouBR10012 Router
Examples Router# show cable modem
MAC Address IP Address I/F MAC Prim RxPwr Timing Num BPI
State Sid (db) Offset CPEs Enbld
0050.04f9.edf6 10.44.51.49 C7/1/0/U0 online 1 -0.50 3757 0 no
0050.04f9.efa0 10.44.51.48 C7/1/0/U0 online 2 -0.50 3757 0 no
0030.d002.41f5 10.44.51.147 C7/1/0/U0 online 3 -0.25 3829 0 no
0030.d002.4177 10.44.51.106 C7/1/0/U0 online 4 -0.50 3798 0 no
0030.d002.3f03 10.44.51.145 C7/1/0/U0 online 5 0.25 3827 0 no
0050.04f9.ee24 10.44.51.45 C7/1/0/U0 online 6 -1.00 3757 0 no
0030.d002.3efd 10.44.51.143 C7/1/0/U0 online 7 -0.25 3827 0 no
0030.d002.41f7 10.44.51.140 C7/1/0/U0 online 8 0.00 3814 0 no
0050.04f9.eb82 10.44.51.53 C7/1/0/U0 online 9 -0.50 3756 0 no
0050.f112.3327 10.44.51.154 C7/1/0/U0 online 10 0.25 3792 0 no
0030.d002.3f8f 10.44.51.141 C7/1/0/U0 online 11 0.00 3806 0 no
0001.64f9.1fb9 10.44.51.55 C7/1/0/U0 online 12 0.00 4483 0 no
0030.d002.417b 10.44.51.146 C7/1/0/U0 online 13 0.50 3812 0 no
0090.9600.6f7d 10.44.51.73 C7/1/0/U0 online 14 0.00 4071 0 no
0010.9501.ccbb 10.44.51.123 C7/1/0/U0 online 15 0.25 3691 0 no
DOCSIS 1.1 Concatenation Support
Concatenation allows the CM to make a single time slice request for multiple packets and send all
packets in a single large burst on the upstream. This is in contrast to making an individual grant request
for each frame. Concatenation was introduced in the upstream receive driver in the DOCSIS1.0+
releases. Per-SID counters have now been added in CiscoIOSRelease12.2XF for debugging
concatenation activity.
Also see the “DOCSIS 1.0 Concatenation Override” section on page19.
The combination of multiple upstream packets into one packet reduces packet overhead and overall
latency, and increases transmission efficiency. Using concatenation, a CM needs to make only one
bandwidth request for a concatenated packet, as opposed to making a different bandwidth request for
each packet. This technique is particularly effective for real-time traffic.
Tip Concatenation is supported only with CMs that support DOCSIS concatenation as part of
DOCSIS1.0 extensions. The results of the show controller command indicate whether
concatenation is enabled on an interface.
Concatenation is enabled by default for current cable interface line cards, but can be disabled with
the Cisco IOS no cable upstream number concatenation interface command. A CM is considered
noncompliant when it concatenates after the Cisco IOS no cable upstream number concatenation
interface command is issued.
Commands
Router# show interface cable x/y sid [n] counters [verbose]
Router# show controller cable x/y
Router(config-if)# [no] cable upstream n concatenation
Router# debug cable errors
For additional configuration information, refer to the DOCSIS 1.1 for Cisco uBR7200 Series Universal
Broadband Routers on Cisco.com.
DOCSIS 1.1 Customer Premises Equipment Configurator
Cisco offers an HTML-based DOCSIS 1.1 CPE Configurator tool—described and accessed from
http://www.cisco.com/univercd/cc/td/doc/pcat/docsys.htm. The tool is designed to collect information
needed to generate a DOCSIS 1.1 CM configuration file. The generated file is in binary format consistent with
the DOCSIS RF Specification (SP-RFI-105-991105) at http://www.cablemodem.com/specifications.html.