Status LEDs

Each DSFP28 cage has two adjacent LEDs, showing the status of its two supported ports:

• The LEDs for cage 1 show the status of ports 0 and 2.
• The LEDs for cage 2 show the status of ports 1 and 3.

Figure 1. X3522 LEDs

The link status LED for a cage is:

• Green when both ports for the cage have a physical link.
• Amber when only one port for the cage has a physical link.
  Note: This includes when an SFP28 or SFP+ cable is connected, and so only a single port is exposed.
• Off in the absence of any physical link.
• Blinking red if a command such as ethtool --identify has been issued to identify the network port.

The activity LED for a cage is:

• Blinking green when there is link activity on all exposed network ports for the cage.
• Off when there is no activity on any exposed network port for the cage.