Departmental Switch Model DS-16B Hardware Reference Manual
Front Panel Diagnostics
Status and Activity Indicators
Front Panel LED Port
Indicators
The color and flash speed of each port’s LED, as described in
Table 4-1, indicates the individual port’s status.
Initialization Steps
At power-on or reset, the following steps are executed:
1. Preliminary POST diagnostics
2. VxWorks operating system initialization
3. Hardware initialization (resets, internal addresses assigned to
ASICs, serial port initialized, front panel initialized)
4. Full POST
5. Link initialization; receiver/transmitter negotiation to bring
connected ports online
6. Fabric analysis; the switch checks for ports connected to other
Fabric elements. If there are other Fabric elements connected, it
identifies the master switch.
Table 4-1 Port LED Status Indicators
Port’s LED Definition
No light showing No light or signal carrier (no module, no cable) for media interface
Steady yellow Receiving light or signal carrier, but not yet online
Slow yellow
(flashes two seconds)
Disabled (result of diagnostics or portDisable command)
Fast yellow
(flashes a half second)
Error, fault with port
Steady green Online (connected with external device over cable)
Slow green
(flashes two seconds)
Online, but segmented (loopback cable or incompatible switch)
Fast green
(flashes a half second)
Internal loopback (diagnostic)
Flickering green Online and frames flowing through port
