Information About EEE
EEE Overview
Energy Efficient Ethernet (EEE) is an IEEE 802.3az standard that is designed to reduce power consumption in Ethernet networks during idle periods.
Default EEE Configuration
EEE is disabled by default.
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Energy Efficient Ethernet (EEE) is an IEEE 802.3az standard that is designed to reduce power consumption in Ethernet networks during idle periods.
EEE is disabled by default.
EEE has the following restrictions:
Changing the EEE configuration resets the interface because the device has to restart Layer 1 autonegotiation.
You might want to enable the Link Layer Discovery Protocol (LLDP) for devices that require longer wakeup times before they are able to accept data on their receive paths. Doing so enables the device to negotiate for extended system wakeup times from the transmitting link partner.
You can enable or disable EEE on an interface that is connected to an EEE-capable link partner.
Command or Action | Purpose | |
---|---|---|
Step 1 |
configure terminal Example:
|
Enters global configuration mode. |
Step 2 |
interface interface-id Example:
|
Specifies the interface to be configured, and enter interface configuration mode. |
Step 3 |
power efficient-ethernet auto Example:
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Enables EEE on the specified interface. When EEE is enabled, the device advertises and autonegotiates EEE to its link partner. |
Step 4 |
no power efficient-ethernet auto Example:
|
|
Step 5 |
end Example:
|
Returns to privileged EXEC mode. |
Step 6 |
copy running-config startup-config Example:
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(Optional) Saves your entries in the configuration file. |
Command |
Purpose |
---|---|
show eee capabilities interface interface-id |
Displays EEE capabilities for the specified interface. |
show eee status interface interface-id |
Displays EEE status information for the specified interface. |
show eee counters interface interface-id |
Displays EEE counters for the specified interface. |
Following are examples of the show eee commands
Switch#show eee capabilities interface gigabitEthernet2/0/1
Gi2/0/1
EEE(efficient-ethernet): yes (100-Tx and 1000T auto)
Link Partner : yes (100-Tx and 1000T auto)
ASIC/Interface : EEE Capable/EEE Enabled
Switch#show eee status interface gigabitEthernet2/0/1
Gi2/0/1 is up
EEE(efficient-ethernet): Operational
Rx LPI Status : Low Power
Tx LPI Status : Low Power
Wake Error Count : 0
ASIC EEE STATUS
Rx LPI Status : Receiving LPI
Tx LPI Status : Transmitting LPI
Link Fault Status : Link Up
Sync Status : Code group synchronization with data stream intact
Switch#show eee counters interface gigabitEthernet2/0/1
LP Active Tx Time (10us) : 66649648
LP Transitioning Tx : 462
LP Active Rx Time (10us) : 64911682
LP Transitioning Rx : 153
Examples for Cataylst Digital Building Series Switches
Switch#show eee capabilities interface gig1/0/1
Gi1/0/1
EEE(efficient-ethernet): yes (100-Tx and 1000T auto)
Link Partner : no
Switch#show eee status int gig1/0/1
Gi1/0/1 is up
EEE(efficient-ethernet): Disagreed
Rx LPI Status : None
Tx LPI Status : None
Wake Error Count : 0
This example shows how to enable EEE for an interface:
Device# configure terminal
Device(config)# interface gigabitethernet 1/0/1
Device(config-if)# power efficient-ethernet auto
This example shows how to disable EEE for an interface:
Device# configure terminal
Device(config)# interface gigabitethernet 1/0/1
Device(config-if)# no power efficient-ethernet auto
MIB | MIBs Link |
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All supported MIBs for this release. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
Description | Link |
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Release |
Modification |
---|---|
Cisco IOS XE 3.3SECisco IOS XE 3.3SE |
This feature was introduced. |