Multiple dark ports may indicate a larger hardware or network issue. Follow these steps for quick troubleshooting: Observe the LED: Solid green usually means the port is active; blinking green indicates traffic. Test the cable: Swap with a known working Ethernet cable. On a switch, the alarm signal is the ALM LED lit on the front of the chassis. Find hardware specs and step-by-step instructions for using your device. Understand key features and benefits of your. View and Download Juniper EX2300-C hardware manual online. Page 4 Requirements for Mounting an EX2300 Switch On or Under a Desk or Other Level Surface or On a Wall | 66 Clearance Requirements for Airflow and Hardware Maintenance for EX2300 Switches | 67 EX2300 Network Cable and Transceiver Planning | 75 Pluggable Transceivers Supported on EX2300 Switches |. But I have several physical ports that have their LEDs stuck on.
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