EMC DS-16B manual Status and Activity Indicators, Front Panel LED Port

Front Panel Diagnostics

Status and Activity Indicators

Front Panel LED Port		The color and flash speed of each port’s LED, as described in
Indicators		Table 4-1, indicates the individual port’s status.
	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		Disabled (result of diagnostics or portDisable command)
	(flashes two seconds)
	Fast yellow		Error, fault with port
	(flashes a half second)
	Steady green		Online (connected with external device over cable)
	Slow green		Online, but segmented (loopback cable or incompatible switch)
	(flashes two seconds)
	Fast green		Internal loopback (diagnostic)
	(flashes a half second)
	Flickering green		Online and frames flowing through port

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.

Departmental Switch Model DS-16B Hardware Reference Manual