Power over Ethernet (PoE) Support
PoE removes the need for wall power to each PoE-enabled device and eliminates the cost for additional
electrical cabling and circuits that would otherwise be necessary in IP phone and Wireless LAN (WLAN)
deployments thereby providing a lower TCO for deployments that incorporate these devices or any IEEE
802.3af-compliant end device in general. The power requirements of endpoints vary based on their application,
complexity, and function. For instance, basic IP phones might draw approximately 6W of power, whereas
contemporary LED lighting fixtures can draw up to 50W for routine operation.
The SM-X EtherSwitch modules can support POE, POE+ and UPOE on any of the RJ45 copper ports (16xGiG +
4xmGiG or 40xGiG + 8xmGiG). All 22 or 48 copper ports support Power over Ethernet (PoE) - 15.4 W and PoE+
up to 30W. The same ports support standardized 802.3af (15.4W) and 802.3at (25.5W). Up to 8 Copper
Ethernet Interfaces provide UPOE (60W) support per module. The table below lists the possible PoE and Power
Supply combinations.
Table 3 gives information about total PoE power output. Depending on the Cisco 4400, 4300, platform models,
the available PoE power ranges from 250 to 1000 watts. Power over Ethernet requires the PoE versions of the
router power supplies. The ISR4400, ISR4300 series routers support multiple PoE powering modes:
●
Normal: One PoE power supply.
●
Redundant: Two PoE internal power supplies (ISR4451-X and ISR4461 Series) where one is active and
one is standby.
●
Boost: Two PoE internal power supplies (ISR4451-X and ISR4461 Series), where both are actively
supplying PoE power; redundancy will not be supported in this mode because both power supplies are in
active use simultaneously.
Table 3. Number of Power over Ethernet Ports Supported
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