Enterasys b5

Enterasys B5 CLI Reference 4-1
4
Configuring System Power and PoE
ThecommandsinthischapterallowyoutoreviewandsetsystempowerandPoE(Powerover
Ethernet)parameters,includingthepoweravailabletothesystem,theusagethresholdforeach
module,whetherornotSNMPtrapmessageswillbesentwhenpowerstatuschanges,andper‐
portPoEsettings.
For
moreextensiveconfigurationinformation,refertothe“ConfiguringPoweroverEthernet
Management”featureguideontheEnterasysNetworkswebsite:https://extranet.enterasys.com/
downloads/
Power Management
Management of PoE Power to PDs
ForeachPoE‐capablemodule,youcanconfigurehowitsPoEcontrollermakespoweravailableto
attachedpowereddevices(PDs).Onapermodulebasis,youcanconfigure:
• Real‐timemode,inwhichthePoEcontrollercalculatesthepowerneededbyaPDbasedon
theactualpowerconsumptionofthe
attacheddevices.
• Classmode,inwhichthePoEcontrollermanagespowerbasedontheIEEE802.3af/.3at
definitionoftheclasslimitsadvertisedbytheattacheddevices,withtheexceptionthatfor
class0andclass4devices,actualpowerconsumptionwillalwaysbeused.Inthismode,the
maximumamount
ofpowerrequiredbyadeviceintheadvertisedclassisreservedforthe
port,regardlessoftheactualamountofpowerbeingusedbythedevice.
PowermanagementtoPDsisconfiguredwiththecommand“setinlinepowermanagement”
(page 4‐7).PoEclassesaredefinedas:
Important Notice
The commands in this section apply only to PoE-equipped devices. Consult the Installation Guide for your
product to determine if it is PoE-equipped.
Table 4-1 PoE Powered Device Classes
Class Power Output at Port Power Range Used by Device
0 15.4 watts 0.44 to 12.95 watts
1 4.0 watts 0.44 to 3.84 watts
2 7.0 watts 3.84 to 6.49 watts
3 15.4 watts 6.49 to 12.95 watts