Switching

Hi.

Let's say I have an EX switch that has a POE port to which an IP phone is connected. The POE port is configured for POE as well as LLDP-MED. The amount of power the POE port reserves for the IP phone will be learnt via the LLDP-MED messages from the IP phone. However, the IP phone needs to be powered up in order to send these LLDP-MED message. So my question is: What is the amount of power sent by a POE port before it learns the power class of the IP phone via its LLDP-MED messages ?

Thanks,

Deepak

-------------------------------------------

The port starts at the default configuration for the port or fpc on the switch, then uses the LLDP negotiation to adjust as devices come online.  The full details of all the options and process are in the poe guide.

https://www.juniper.net/documentation/us/en/software/junos/poe/poe.pdf

------------------------------
Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
http://puluka.com/home
------------------------------

Original Message:
Sent: 10-15-2025 05:39
From: djadhav
Subject: Question on POE

Hi.

Let's say I have an EX switch that has a POE port to which an IP phone is connected. The POE port is configured for POE as well as LLDP-MED. The amount of power the POE port reserves for the IP phone will be learnt via the LLDP-MED messages from the IP phone. However, the IP phone needs to be powered up in order to send these LLDP-MED message. So my question is: What is the amount of power sent by a POE port before it learns the power class of the IP phone via its LLDP-MED messages ?

Thanks,

Deepak

-------------------------------------------