Catalyst 9000 switches and line cards with 'P' in their product ID support PoE+ on a group of ports or all ports.Cisco UPoE+ is based on IEEE 802.03bt & is available on selective Catalyst 9000 products and can provide up to 90W per port.Cisco UPoE (Universal Power over Ethernet) device detection and classification functions just like standards-based, but the 30W limit is raised to 60W by negotiation (post-power-up) through Link Layer Discovery Protocol (LLDP) to obtain inline power over additional wires.IEEE 802.3af (PoE) and 802.3at (PoE+) powered devices (PDs) are detected by a PoE controller on Catalyst 9000 switch/line card (sometimes there are more than one), and appropriate power level can be classified prior to power on via IEEE classification, as well as negotiated later.Pre-standard PoE devices are detected & classified at layer 1 by switch the Physical Layer Device (PHY), power is supplied at a default level, and/or higher power levels are negotiated with Cisco Discovery Protocol (CDP).Background InformationĬatalyst 9000 switches support different kinds of PoE standards. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The example outputs in this document are based on a number of software and hardware versions from the Catalyst 9000 product family. PoE is supported on PoE capable switch and line card models in Catalyst 9200, Catalyst 9300 and Catalyst 9400 product family. This document is not restricted to specific software and hardware versions. Prerequisites RequirementsĬisco recommends that you have knowledge of these topics: This document describes how to troubleshoot Power over Ethernet (PoE) on Catalyst 9000 PoE-capable switching platforms.

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