Table 5. Feature History Table
|
Feature Name
|
Release Information
|
Description
|
|
Dynamic Power Management
|
Release 7.3.15
|
The Dynamic Power Management feature considers certain dynamic factors before allocating power to the fabric and line cards.
This feature has the following benefits:
This feature thus optimizes power allocation and avoids overprovisioning power to a router.
|
|
Dynamic Power Management
|
Release 7.3.2 |
Previously available for fabric and line cards, this feature that helps avoid excess power allocation by considering dynamic
factors before allocating power to them is now available for optical modules.
To view the power allocation on a per port basis, a new command “show environment power allocated [details]" is introduced.
|
|
Dynamic Power Management
|
Release 7.3.3 |
The Dynamic Power Management feature is now supported on the following Cisco 8100 and 8200 series routers:
-
Cisco 8201
-
Cisco 8202
-
Cisco 8201-32-FH
-
Cisco 8101-32-FH
|
Prior to Cisco IOS XR Release 7.3.15, when Cisco 8000 series routers were powered on or reloaded, the power management feature
reserved power to fabric cards and allocated maximum power to line cards. The power management feature wouldn’t consider dynamic
factors, such as the type of fabric or line cards in the chassis, or whether a fabric or line card was present in a slot.
The Dynamic Power Management feature considers such dynamic factors before allocating power to the fabric and line cards.
This feature has the following benefits:
This feature thus optimizes power allocation and avoids overprovisioning power to a router.
This feature is supported on the following Cisco 8000 series routers:
-
Cisco 8804, 8808, 8812, and 8818 routers
-
Cisco 8201, 8202, 8201-32-FH routers
-
Cisco 8101-32-FH
By default, this feature is enabled on the router.
The Dynamic Power Management feature allocates the total power to a router and its fabric card or line card based on the following
parameters:
-
Number and type of fabric cards installed on the router
-
Fabric cards operating modes (5FC or 8FC)
-
Number and type of line cards installed on the router
-
Combination of line card and fabric card types installed
-
NPU power mode configured on a fabric card
-
Number and type of optics installed (supported in Cisco IOS XR Software Release 7.3.2 and later)
-
MACSec-enabled ports (supported from Cisco IOS XR Software
Release 7.3.3 and later)
For details, see Dynamic Power Management for MACSec-Enabled Ports section in the Configuring MACSec chapter in the
System Security Configuration Guide for Cisco 8000 Series Routers.
Note
|
We recommend you work with your Cisco account representatives to calculate power requirements for the Cisco 8000 series router.
|
Power Allocation to Empty Card Slot
This feature allocates a minimum required power for all empty LC or FC slots. This minimum power is required to boot the CPU
and FPGAs immediately when a card is inserted. The feature doesn't control booting up the CPU and FPGAs. Also, the minimum
power is required to detect the card type before the feature decides if there’s enough power to power up the data path.
For example, the following show environment power command output displays various LC or FC card statuses, and also shows allocated and used power.
Note
|
The allocated power capacity shown in the following show command output isn’t standard capacity. The allocated power capacity varies depending on various other factors.
|
Router# show environment power
Thu Apr 22 12:03:06.754 UTC
================================================================================
CHASSIS LEVEL POWER INFO: 0
================================================================================
Total output power capacity (N + 1) : 9600W + 6300W
Total output power required : 9241W
Total power input : 6146W
Total power output : 5826W
================================================================================
Power Supply -------Input-------- -----Output--- Status
Module Type Volts A/B Amps A/B Volts Amps
================================================================================
0/PT0-PM0 PSU6.3KW-HV 245.5/245.7 5.1/5.0 54.7 43.1 OK
0/PT0-PM1 PSU6.3KW-HV 0.0/245.2 0.0/7.4 54.3 31.7 OK
0/PT0-PM2 PSU6.3KW-HV 0.0/246.9 0.0/7.5 54.1 32.3 OK
Total of Power Modules: 6146W/25.0A 5826W/107.1A
================================================================================
Location Card Type Power Power Status
Allocated Used
Watts Watts
================================================================================
0/RP0/CPU0 8800-RP 95 69 ON
0/RP1/CPU0 - 95 - RESERVED
0/0/CPU0 88-LC0-36FH 796 430 ON
0/1/CPU0 - 102 - RESERVED
0/2/CPU0 88-LC0-36FH 796 430 ON
0/3/CPU0 - 102 - RESERVED
0/4/CPU0 - 102 - RESERVED
0/5/CPU0 - 102 - RESERVED
0/6/CPU0 - 102 - RESERVED
0/7/CPU0 - 102 - RESERVED
0/8/CPU0 - 102 - RESERVED
0/9/CPU0 88-LC0-36FH 102 - OFF
0/10/CPU0 - 102 - RESERVED
0/11/CPU0 - 102 - RESERVED
0/FC0 - 26 - RESERVED
0/FC1 - 26 - RESERVED
0/FC2 - 26 - RESERVED
0/FC3 8812-FC 784 509 ON
0/FC4 8812-FC 784 503 ON
0/FC5 8812-FC 26 - OFF
0/FC6 8812-FC 26 - OFF
0/FC7 8812-FC 26 - OFF
0/FT0 8812-FAN 1072 1000 ON
0/FT1 8812-FAN 1072 1012 ON
0/FT2 8812-FAN 1072 861 ON
0/FT3 8812-FAN 1072 1033 ON
This table describes the card slot statuses:
Table 6. Router Card Slot Status
|
Status
|
Description
|
|
RESERVED
|
When a slot is empty
|
|
OFF
|
When a card is inserted in a slot but power isn’t allocated to the card
|
|
ON
|
When a card is allocated power and the card is in operational state
|
Low-Power Condition
When you insert an LC or FC in a card slot at the time when the router doesn't have enough power available to allocate to
the new card, the dynamic power management feature doesn't provision power to the card. It raises the ev_power_budget_not_ok alarm, and gracefully shuts down the card.
In the following show command output, an FC inserted in the card slot location 0/FC6 is gracefully shut down due to lack of power:
Router# show shelfmgr history events location 0/FC6
Thu Apr 22 12:03:11.763 UTC
NODE NAME : 0/FC6
CURRENT STATE : CARD_SHUT_POWERED_OFF
TIME STAMP : Apr 20 2021 16:49:52
--------------------------------------------------------------------------------
DATE TIME (UTC) EVENT STATE
--------------------------------------------------------------------------------
Apr 20 2021 16:49:52 ev_powered_off CARD_SHUT_POWERED_OFF
Apr 20 2021 16:49:52 ev_device_offline STATE_NOT_CHANGED
Apr 20 2021 16:49:52 ev_unmapped_event STATE_NOT_CHANGED
Apr 20 2021 16:49:48 transient_condition CARD_SHUTDOWN
Apr 20 2021 16:49:48 ev_check_card_down_reaso CHECKING_DOWN_REASON
Apr 20 2021 16:49:48 ev_timer_expiry CARD_SHUTDOWN_IN_PROGRESS
Apr 20 2021 16:48:46 ev_power_budget_not_ok CARD_SHUTDOWN_IN_PROGRESS
Apr 20 2021 16:48:45 transient_condition POWER_BUDGET_CHECK
Apr 20 2021 16:48:45 ev_fpd_upgrade_not_reqd CARD_STATUS_CHECK_COMPLETE
Apr 20 2021 16:47:45 ev_card_status_check CARD_STATUS_CHECK
Apr 20 2021 16:47:45 ev_card_info_rcvd CARD_INFO_RCVD
Apr 20 2021 16:47:44 ev_device_online DEVICE_ONLINE
Apr 20 2021 16:47:43 ev_timer_expiry CARD_POWERED_ON
Apr 20 2021 16:47:33 ev_powered_on CARD_POWERED_ON
Apr 20 2021 16:47:33 init CARD_DISCOVERED
--------------------------------------------------------------------------------
However, after an LC, FC, or chassis reload, the dynamic power management feature can't ensure that the same LCs, FCs, optics,
or interfaces, which were operational earlier (before the reload), would become active again.
Note
|
During a low-power condition, this feature doesn’t borrow power from a redundant power supply.
|
Power Allocation to Optics
From Cisco IOS XR Release 7.3.2 onwards, power requirement for optics is also considered before allocating power to them.
To identify the power allocated for a particular interface, use the show environment power allocated [details] location location command.
When the optical modules are inserted, power is automatically allocated for that interface. If power has been allocated to
the interface, then use the “no shut” command to enable the interface.
Router# show environment power allocated location 0/3/CPU0
Thu Oct 7 22:27:35.732 UTC
================================================================================
Location Components Power
Allocated
Watts
================================================================================
0/3/CPU0 Data-path 772
OPTICS 138
================================================================================
Total 910
Router# show environment power allocated details location 0/3/CPU0
Thu Oct 7 22:27:42.221 UTC
================================================================================
Location Components Power
Allocated
Watts
================================================================================
0/3/CPU0 Data-path 772
0/3/0/0 3
0/3/0/1 3
0/3/0/2 3
0/3/0/3 3
0/3/0/4 3
0/3/0/5 3
0/3/0/6 3
0/3/0/7 3
0/3/0/8 3
0/3/0/9 3
0/3/0/10 3
0/3/0/11 3
0/3/0/12 3
0/3/0/13 3
0/3/0/14 3
0/3/0/15 3
0/3/0/16 3
0/3/0/17 3
0/3/0/18 3
0/3/0/19 3
0/3/0/20 3
0/3/0/21 3
0/3/0/22 3
0/3/0/23 3
0/3/0/24 3
0/3/0/25 3
0/3/0/26 3
0/3/0/27 3
0/3/0/28 3
0/3/0/29 3
0/3/0/30 3
0/3/0/31 3
0/3/0/32 3
0/3/0/33 3
0/3/0/34 3
0/3/0/35 3
0/3/0/36 3
0/3/0/37 3
0/3/0/38 3
0/3/0/39 3
0/3/0/40 3
0/3/0/41 3
0/3/0/42 3
0/3/0/43 3
0/3/0/44 3
0/3/0/46 3
================================================================================
Total 910
When the power is not allocated to the interface, the following syslog error and alarms are displayed!<--Syslog Error-->!
#LC/0/3/CPU0:Oct 7 22:46:48.114 UTC: optics_driver[165]: %PKT_INFRA-FM-3-FAULT_MAJOR : ALARM_MAJOR :POWER ALLOCATION FAIL :DECLARE :0/3/CPU0: Optics0/3/0/44
LC/0/3/CPU0:Oct 7 22:46:48.114 UTC: optics_driver[165]: %L2-OPTICS-2-QSFP_POWER_ALLOCATION_FAILURE : Not enough power available to enable Optics 0/3/0/44
!<--Alarm-->!
Router#show alarms brief system active
Thu Oct 7 22:47:19.569 UTC
------------------------------------------------------------------------------------
Active Alarms
------------------------------------------------------------------------------------
Location Severity Group Set Time Description
------------------------------------------------------------------------------------
0/3/CPU0 Major Software 10/07/2021 22:46:48 UTC Optics0/3/0/44 - hw_optics: Lack of available power to enable the optical module
0/3/CPU0 Major Software 10/07/2021 22:47:06 UTC Optics0/3/0/46 - hw_optics: Lack of available power to enable the optical module
If power is not allocated to an interface and you attempt to enable that interface using the “no shut” command, the following syslog error is displayed:
LC/0/2/CPU0:Aug 30 18:01:14.930 UTC: eth_intf_ea[262]: %PLATFORM-VEEA-1-PORT_NOT_ENABLED : Power not allocated to enable the interface HundredGigE0_2_0_6.
Power Allocation to Fixed-Port Routers
The following show environment power command output displays power information for fixed-port routers and components.
Router# show environment power
Wed Feb 16 21:05:10.001 UTC
================================================================================
CHASSIS LEVEL POWER INFO: 0
================================================================================
Total output power capacity (Group 0 + Group 1) : 1400W + 1400W
Total output power required : 1033W
Total power input : 390W
Total power output : 255W
Power Group 0:
================================================================================
Power Supply ------Input---- ------Output--- Status
Module Type Volts Amps Volts Amps
================================================================================
0/PM0 PSU1.4KW-ACPE 244.5 0.8 12.0 11.1 OK
Total of Group 0: 195W/0.8A 133W/11.1A
Power Group 1:
================================================================================
Power Supply ------Input---- ------Output--- Status
Module Type Volts Amps Volts Amps
================================================================================
0/PM1 PSU1.4KW-ACPE 244.2 0.8 12.0 10.2 OK
Total of Group 1: 195W/0.8A 122W/10.2A
================================================================================
Location Card Type Power Power Status
Allocated Used
Watts Watts
================================================================================
0/RP0/CPU0 8201 893 - ON
0/FT0 FAN-1RU-PE 28 - ON
0/FT1 FAN-1RU-PE 28 - ON
0/FT2 FAN-1RU-PE 28 - ON
0/FT3 FAN-1RU-PE 28 - ON
0/FT4 FAN-1RU-PE 28 - ON
To identify the power allocated for a particular interface, use the show environment power allocated [details] location location command.
Router# show environment power allocated location 0/RP0/CPU0
Wed Feb 16 21:05:21.360 UTC
================================================================================
Location Components Power
Allocated
Watts
================================================================================
0/RP0/CPU0 Data-path 858
OPTICS 35
================================================================================
Total 893
Router# show environment power allocated details location 0/RP0/CPU0
Wed Feb 16 21:05:36.142 UTC
================================================================================
Location Components Power
Allocated
Watts
================================================================================
0/RP0/CPU0 Data-path 858
0/0/0/19 21
0/0/0/18 14
================================================================================
Total 893
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