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Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 11 Configuring Power over Ethernet
Enhanced Power PoE Support on the E-Series Chassis
The errdisable autorecovery mechanism allows you to configure a timer for errdisable recovery so that
when an interface enters errdisable state (after the timer expires), the interface returns from the
errdisable state.
errdisable detection
By default, errdisable detection for inline-power is enabled, as the following example illustrates:
Switch# show errdisable detect
ErrDisable Reason Detection Mode
----------------- --------- ----
inline-power Enabled port
Note If detection is disabled (through the errdisable detect cause inline-power command), the port is not
placed in errdisable state when it exceeds its power policing threshold.
errdisable recovery
By default, errdisable recovery for inline-power is disabled. To enable errdisable recovery, enter the
errdisable detect cause line-power command:
Switch# conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# errdisable detect cause inline-power
Switch(config)# end
Switch# show errdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
----------- ----------
inline-power Enabled
Enhanced Power PoE Support on the E-Series Chassis
The WS-X4648-RJ45V-E, WS-X4648-RJ45V+E, and WS-X4548-RJ45V+ switching modules support
IEEE 802.3af PoE as well as the Cisco proprietary Inline Power standard. With Cisco IOS Release
12.2(44)SG, the WS-X4648-RJ45V+E line card can also support the IEEE 802.3at standard with up to
30 W available per-port. The WS-X4648-RJ45V-E line card also supports up to 20 W. The
WS-X4548-RJ45V+ switching module is supported with Cisco IOS Release 12.2(50)SG and can provide
up to 30 W of inline power per-port. With Cisco IOS Release 15.0(2)SG, we support 60W on the
WS-X4748-RJ45V+E linecard.
For these switching modules, the valid milliwatt ranges for the power inline command have been
increased appropriately for the module, as the following table illustrates:
Line card Standard Max Power/Port Cisco IOS Release
WS-X4248-RJ45V IEEE 802.3af 15.4 W 12.2(18)EW
WS-X4548-RJ45V IEEE 802.3af 15.4 W 12.2(18)EW
WS-X4648-RJ45V-E IEEE 802.3af
IEEE 802.3at
20 W 12.2(44)SG
WS-X4648-RJ45V+E IEEE 802.3af
IEEE 802.3at
30 W 12.2(44)SG