Support Support Downloads Knowledge Base Case Manager My Juniper Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

[SRX] Insufficient Power for SRX320-POE+ with Mist AP LLDP based POE Power Negotiation



Article ID: KB34939 KB Last Updated: 22 Aug 2019Version: 1.0

SRX320 POE+ version supports 30W on all six RJ-45 ports. Mist Access Points (AP) can be powered using these POE ports. While SRX320 supports LLDP and LLDP-MED (Media Endpoint Discovery) , it does not have support for POE power negotiations over LLDP.

This article provides a solution to enable Mist AP to get the required POE power from an SRX320.


Mist AP, when connected to SRX320-POE, comes up with ‘Class 4’ POE negotiation.  Although Mist AP boots up with a power of 11.5W, it needs 25W to function.


SRX320-POE supports configurable POE power using the CLI. To assign the required power of 30W, use the below commands:

set poe management class
set poe interface <ge-0/0/0-5> maximum-power 30

Related Links

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search