2-322
Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 2 Cisco CMTS Configuration Commands
cable upstream ingress-noise-cancellation
where interval is the time period in milliseconds specified by the
cable upstream ingress-noise-
cancellation
command, and
channel-symbol-rate
is the symbol rate in kilohertz. For example, if the
upstream is using a 2.56 MHz channel rate and a noise cancellation interval of 10 milliseconds, the
bandwidth cost is 1% of the total raw bandwidth:
(256/10)/2560 = 0.01 (1% of bandwidth)
Note
This command is available only on the Cisco uBR-MC5X20U, Cisco uBR-MC16U/X and
Cisco uBR-MC28U/X cable interface line card. It cannot be used on other cable interface line cards.
Examples
The following example shows how to configure the first upstream on a Cisco uBR-MC16U/X or
Cisco uBR-MC28U/X card to perform ingress noise cancellation every 300 milliseconds:
Router#
configure terminal
Router(config)#
interface cable 5/0
Router(config-if)#
cable upstream 0 ingress-noise-cancellation 300
Router(config-if)#
Related Commands
cable modulation-profile
Defines a modulation profile for use on the router.
cable upstream channel-
width
Specifies an upstream channel width for an upstream port.
cable upstream docsis-
mode
Configures an upstream to use either DOCSIS 1.x or DOCSIS 2.0
modulation profiles.
cable upstream frequency
Enters a fixed frequency of the upstream RF carrier for an upstream port.
cable upstream minislot-
size
Specifies the minislot size (in ticks) for a specific upstream interface.
cable upstream
modulation-profile
Assigns one or two modulation profiles to an upstream port.
cable upstream power-
level
Sets the input power level for the upstream RF carrier in decibels per
millivolt (dBmV).
show cable hop
Displays CM configuration settings.
show cable modulation-
profile
Displays the modulation profile information for a Cisco CMTS.
show interface cable mac-
schedule
Displays the current time-slot scheduling state and statistics.
show interface cable sid
Displays cable interface information.
Содержание Broadband Cable
Страница 760: ...3 264 Cisco Broadband Cable Command Reference Guide OL 1581 08 Chapter 3 Cisco CMTS Show Commands show version ...
Страница 1216: ...6 214 Cisco Broadband Cable Command Reference Guide OL 1581 07 Chapter 6 Cable CPE Commands debug usb ...
Страница 1266: ...A 50 Cisco Broadband Cable Command Reference Guide OL 1581 07 Appendix A Using the ROM Monitor unset ...