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This document describes how to reduce power consumption on the Cisco cBR Series Converged Broadband Router.
Your software release may not support all the features that are documented in this module. For the latest feature information
and caveats, see the release notes for your platform and software release. The Feature Information Table at the end of this
document provides information about the documented features and lists the releases in which each feature is supported.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature
Navigator, go to
http://tools.cisco.com/ITDIT/CFN/.
An account on http://www.cisco.com/ is not required.
Finding Feature Information
Your software release may not support all the features that are documented in this module. For the latest feature information
and caveats, see the release notes for your platform and software release. The Feature Information Table at the end of this
document provides information about the documented features and lists the releases in which each feature is supported.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature
Navigator, go to
http://tools.cisco.com/ITDIT/CFN/.
An account on http://www.cisco.com/ is not required.
Hardware Compatibility Matrix for the Cisco cBR Series Routers
Note
The hardware components that are introduced in a given Cisco IOS-XE Release are supported in all subsequent releases unless
otherwise specified.
Table 1. Hardware Compatibility Matrix for the Cisco cBR Series Routers
Cisco CMTS Platform
Processor Engine
Interface Cards
Cisco cBR-8 Converged Broadband Router
Cisco IOS-XE Release 16.5.1 and Later Releases
Cisco cBR-8Supervisor:
PID—CBR-SUP-250G
PID—CBR-CCAP-SUP-160G
Cisco IOS-XE Release 16.5.1 and Later Releases
Cisco cBR-8 CCAP Line Cards:
PID—CBR-LC-8D30-16U30
PID—CBR-LC-8D31-16U30
PID—CBR-RF-PIC
PID—CBR-RF-PROT-PIC
PID—CBR-CCAP-LC-40G
PID—CBR-CCAP-LC-40G-R
PID—CBR-CCAP-LC-G2-R
PID—CBR-SUP-8X10G-PIC
PID—CBR-2X100G-PIC
Digital PICs:
PID—CBR-DPIC-8X10G
PID—CBR-DPIC-2X100G
Cisco cBR-8 Downstream PHY Module:
PID—CBR-D31-DS-MOD
Cisco cBR-8 Upstream PHY Modules:
PID—CBR-D31-US-MOD
Note
Do not use DPICs (8X10G and 2x100G) to forward IP traffic, as it may cause buffer exhaustion, leading to line card reload.
The only allowed traffic on a DPIC interface is DEPI, UEPI, and GCP traffic from the Cisco cBR-8 router to Remote PHY devices.
Other traffic such as DHCP, SSH, and UTSC should flow via another router, since DPICs cannot be used for normal routing.
Information About Reducing Power Consumption
A Cisco cBR-8 CCAP line card has two downstream PHY modules. The first downstream PHY module has port number 0 through port
number 3. The second downstream PHY module has port number 4 through port number 7. Each downstream PHY module consumes approximately
70W of power even if no RF channels are used. By default, both downstream PHY modules are powered up.
To reduce power consumption in the Cisco cBR-8, you can power down the second downstream PHY module.
The power-saving configuration is retained for supervisor card reload, supervisor high availability, LCHA, and LCPR configurations.
Restrictions for Setting Up Power-Saving Configuration
The following restrictions are applicable for setting up power-saving configuration:
Before powering down the second downstream PHY module, you must shut down the downstream controllers.
You cannot power down the downstream PHY module on a redundant line card.
The redundant line card must be in the hot standby mode.
Configure Reduction of Power Consumption
Before powering down the second downstream PHY module, you must shut down the downstream controllers.
To shut down downstream controllers 4 to 7, run the following commands:
After powering down the second downstream PHY module, the power consumption in downstream controllers 4 to 7 changes to 0.
To check power consumption in downstream controllers 4 to 7, run the following command:
Router# show cable card 1/0 ds-phy display | include Watts
Port0-3 Power Consumption 82781 (mWatts), Port4-7 Power Consumption 53443 (mWatts)
To check power consumption in downstream controllers 4 to 7 after powering down the downstream PHY module, run the following
command.
Router#show cable card 1/0 ds-phy display | include Watts
Port0-3 Power Consumption 82781 (mWatts), Port4-7 Power Consumption 0 (mWatts)
The second downstream PHY module information shows Powered down to save energy when the show cable card slot/sub-slot ds-phy display | include detected command is run.
Feature Information for Reducing Power Consumption
Use Cisco Feature Navigator to find information about the platform support and software image support. Cisco Feature Navigator
enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature
Navigator, go to the https://cfnng.cisco.com/ link. An account on the Cisco.com page is not required.
Note
The following table lists the software release in which a given feature is introduced. Unless noted otherwise, subsequent
releases of that software release train also support that feature.
Table 2. Feature Information for Reducing Power Consumption
Feature Name
Releases
Feature Information
Reducing Power Consumption
Cisco IOS XE Fuji 16.9.1a
This feature was introduced in Cisco IOS XE Fuji 16.9.1 on the Cisco cBR Series Converged Broadband Routers.