Cisco uBR10012 Software Configuration Manual page 53

Chapter 1 Overview of Cisco uBR10012 Universal Broadband Router Software
Examples
Router# show cable modem
MAC Address
0050.04f9.edf6 10.44.51.49
0050.04f9.efa0 10.44.51.48
0030.d002.41f5 10.44.51.147
0030.d002.4177 10.44.51.106
0030.d002.3f03 10.44.51.145
0050.04f9.ee24 10.44.51.45
0030.d002.3efd 10.44.51.143
0030.d002.41f7 10.44.51.140
0050.04f9.eb82 10.44.51.53
0050.f112.3327 10.44.51.154
0030.d002.3f8f 10.44.51.141
0001.64f9.1fb9 10.44.51.55
0030.d002.417b 10.44.51.146
0090.9600.6f7d 10.44.51.73
0010.9501.ccbb 10.44.51.123
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 Cisco IOS Release 12.2XF for debugging
concatenation activity.
Also see the
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.
Concatenation is supported only with CMs that support DOCSIS concatenation as part of
Tip
DOCSIS 1.0 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
Broadband Routers
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/en/US/products/index.html. 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.cablelabs.com/cablemodem/specifications/.
OL-1520-05
IP Address I/F
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
C7/1/0/U0 online
"DOCSIS 1.0 Concatenation Override" section on page
on Cisco.com.
Cisco uBR10012 Universal Broadband Router Software Configuration Guide
Supported Software Features for the Cisco uBR10012 Router
MAC Prim RxPwr Timing Num
State Sid (db)
1 -0.50
2 -0.50
3 -0.25
4 -0.50
5 0.25
6 -1.00
7 -0.25
8 0.00
9 -0.50
10 0.25
11 0.00
12 0.00
13 0.50
14 0.00
15 0.25
1-20.
DOCSIS 1.1 for Cisco uBR7200 Series Universal
BPI
Offset CPEs Enbld
3757 0 no
3757 0 no
3829 0 no
3798 0 no
3827 0 no
3757 0 no
3827 0 no
3814 0 no
3756 0 no
3792 0 no
3806 0 no
4483 0 no
3812 0 no
4071 0 no
3691 0 no
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