Support Support Downloads Knowledge Base Juniper Support Portal 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

ACX1000 and ACX2000 can not notify administrator of power feed problem



Article ID: KB30989 KB Last Updated: 27 Jun 2016Version: 1.0

The ACX1000 and ACX2000 allow multiple power inputs for redundancy, but can not notify the administrator that one of the power feeds has failed.


Most platforms with a redundant power option will notify the administrator if one of the power feeds fail, but the ACX1000 and ACX2000 can not detect a state change in one feed. There will only be an alarm when both feeds fail simultaneously.


Both the DC-powered ACX1000 and ACX2000 mix the power input feeds together before sending the power to the chassis. Only when both feeds have dropped below the minimum input threshold will the chassis recieve the POWER_FAIL signal.


This is a system limitation. There is no software or hardware fix. The power feed should be monitored external to the ACX. These models do not have a limitation: ACX1100, ACX2100, and ACX2200.

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