3Com 5000 ATM manual Determining Corrective Action, LED State Possible Cause Corrective Action

Troubleshooting Using LEDs 6-3

Determining Corrective Action

Table 6-2 identifies appropriate corrective actions for each base module

LED indication.

Table 6-2Base Module LED Corrective Actions

LED	LED State	Possible Cause	Corrective Action
MOD STAT	Green	Normal operating indication.	None required.
	Off	No power to hub.	Check the controller module power
			LEDs.

The hub does not have enough available power for a new module installation.

Add another power supply to the hub.

Use the SHOW POWER BUDGET command to ascertain available power in the hub.

		The ATM Backbone	Insert a different ATM Backbone
		SwitchModule is faulty.	SwitchModule.
	Yellow	Module failed power-on	Reset ATM Backbone SwitchModule
		diagnostics.	(page 6-12).
			Re-seat ATM Backbone SwitchModule in
			CoreBuilder 5000 hub.
			Refer to “Recovering from Problems” on
			page 6-5.
PACKETCHANNEL	Green	SwitchModule is correctly	None required.
		inserted in hub and recognizes
		PacketChannel backplane.
	Off	ATM Backbone SwitchModule	Re-seat the ATM Backbone
		is not connected to backplane.	SwitchModule in the slot.

Slot does not support PacketChannel operation. To verify, enter the command SHOW MODULE. The General Information field states “ATM Slot” if the slot is reserved for ATM.

Install the ATM Backbone SwitchModule in slots 1 through 8 or 13 through 17.

PacketChannel backplane not installed or incorrectly installed in the hub.

Re-install the PacketChannel backplane or purchase a PacketChannel backplane. Contact your supplier.

Yellow	ATM Backbone SwitchModule	None required.
	transmitting heavy traffic levels
	to the PacketChannel
	backplane.
Yellow	ATM Backbone SwitchModule	None required.
Blinking	transmitting normal traffic
	levels to the PacketChannel
	backplane.