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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-08
Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software Supported Software Features for the CiscouBR10012 Router
Note To conform with a recent change in the DOCSIS 1.0 Baseline Privacy Interface (BPI) Specification,
Cisco IOS Release 12.2(8)BC1 and later releases require that the Baseline Privacy Configuration
Settings Option (Type 17) must be included in the DOCSIS configuration file for all DOCSIS 1.0 cable
modems attempting to register for BPI encryption. If the type 17 option is not included, an
"Unauthorized SAID" warning will appear in the CMTS console, and the cable modem will not be
allowed to come online.
Previous Cisco IOS releases allowed DOCSIS 1.0 cable modems to register for BPI encryption and to
come online, even if the DOCSIS configuration file did not include the type 17 option. The change to
the DOCSIS BPI specification, however, made the type 17 option mandatory for BPI operation.
For more information about this requirement, see the TAC technical note on Cisco.com at
http://www.cisco.com/warp/public/109/bpi_changes_23895.html.
DOCSIS 1.0 Concatenation OverrideCisco IOS release 12.3(13a)BC introduces support for the DOCSIS 1.0 concatenation override feature
on the Cisco uBR10012 router. This feature provides the ability to disable concatenation on DOCSIS 1.0
cable modems, even in circumstances where concatenation is otherwise supported for the upstream
channel.
DOCSIS 1.0 concatenation allows the cable modem to make a single-time slice request for multiple
packets, and to send all packets in a single large burst on the upstream. Concatenation was introduced
in the upstream receive driver in the previous Cisco IOS releases that supported DOCSIS 1.0 +. Per-SID
counters were later added in Cisco IOS release 12.1(4)CX for debugging concatenation activity.
In some circumstances, overriding concatenation on DOCSIS 1.0 cable modems may be preferable, and
Cisco IOS release 12.3(13a)BC supports either option.
Note Even when DOCSIS 1.0 concatenation is disabled with this feature, concatenation remains enabled for
cable modems that are compliant with DOCSIS 1.1 or DOCSIS 2.0.
To enable DOCSIS 1.0 concatenation override with Cisco IOS release 12.3(13a)BC and later releases,
use the new docsis10 keyword with the previously supported cable upstream <n> concatenation
command in privileged EXEC mode:
cable upstream <n> concatenation docsis10
Syntax Description
Examples The following example illustrates DOCSIS 1.0 concatenation override on the Cisco uBR10012 router:
Router# no cable upstream 0 concatenation docsis10
In this example, DOCSIS 1.0 cable modems are updated with REG-RSP so that they are not permitted
to use concatenation.
For additional information about this command, refer to the Cisco Broadband Cable Command
Reference Guide on Cisco.com:
http://www.cisco.com/en/US/products/hw/cable/ps2217/products_command_reference_book0918
6a0080108e88.html
nSpecifies the upstream port number. Valid values start with 0 for the first
upstream port on the cable interface line card.