One Comment on “Which two Layer 2 network discovery protocols are used to detect PoE power requirements?”

1. Jim says:

   October 14, 2015 at 8:45 pm

   This is wrong, it should be ‘CDP’ and ‘LLDP-Med’ below is an paragraph from BCNE in a nutshell on ‘Detection of PoE Power Requirements.

   There are two ways for the powered devices to dynamically request the PoE power from the PSE—proprietary protocols such as the Cisco Discovery Protocol (CDP) used by Cisco IP phones or the standard-based Link Layer Discovery Protocol (LLDP) used by variety of IP phones and access points. Brocade switches support both methods but recommend the latter because it does not limit organizations to a single class of powered devices and because LLDP provides a lot of additional features. Some powered devices such as Cisco IP phones use CDP to advertise their power requirements to PSEs such as Brocade’s PoE switches. Brocade PoE switches support such powered devices and can detect and process power requirements for these devices automatically. The Brocade FastIron PoE switches support IEEE 802.1AB LLDP and ANSI TIA 1057 LLDP-MED standards, enabling organizations to build open-convergence, advanced, multi-vendor networks that enable a variety of PDs to be plugged with Brocade switches.

   
   
   
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