IBM RS/6000 SP manual SP Switch function MAP, Priority, Failing component, Action

		SP Switch function (MAP 0620)
Table 1-10. Switch problem priority listing
Priority	Failing component	Action
1	Software	a. Have customer verify that the software is configured
(1 of 7)		and operating correctly for this processor
		node/system.
		b. If no problem is found, continue with next highest
		priority item in the list for this SRN.
		c. Otherwise, power off this processor node and continue
		service at ªStep 0620-017º on page 1-28.
2	External clock	a. Check to see if a switch clock cable is connected at
(2 of 7)		switch adapter of this processor node.
		b. If clock cable exists, reseat switch clock cable;
		otherwise reseat switch data cable.
		c. Run advanced diagnostics on the device ªcss0º and its
		associated switch port.
		d. If diagnostics fail with the previous SRN, check at
		least one other processor node for indication of a
		clock problem. If necessary, run advanced diagnostics
		on this other node, using the device ªcss0º and its
		associated switch port.
		e. If more than one node has a clock problem, go to
		ªStep 0620-013º on page 1-28.
		f. Replace the switch clock cable or switch data cable
		that was just reseated in step 2 above.
		g. Continue service at ªStep 0620-018º on page 1-28.
3	Data cable	a. Reseat switch data cable at switch adapter of this
(3 of 7)		processor node.
		b. Run advanced diagnostics on the device ªcss0º and
		its associated switch port.
		c. If diagnostics fail with the previous SRN, replace
		switch data cable.
		d. Continue service at ªStep 0620-018º on page 1-28.
4	SPS Adapter	a. Replace the switch adapter card on this processor
(4 of 7)	SP System Attachment	node.
	Adapter	b. Reconnect all cables to the processor node.
		c. Continue service at ªStep 0620-018º on page 1-28.
		Note: Before disconnecting cables or performing service
		actions on an SP-Attached Server, perform ″Decoupling
		and coupling code for SP-Attached Servers″ in RS/6000
		SP: System Service Guide.
5	System or I/O planar	a. Run advanced diagnostics on the ªBase Systemº or
(5 of 7)		I/O planar. If a problem is detected, use SRN to
		service.
		b. Replace the system or I/O planar on this processor
		node. Make sure to reinstall all parts and cables.
		c. Reconnect all cables to the processor node.
		d. Continue service at ªStep 0620-018º on page 1-28.
6	Wrap plug or	Check the wrap plug or terminator again to make sure
(6 of 7)	Terminator	that it is not at fault.
7	All components replaced.	Call next level of support.
(7 of 7)

Chapter 1. Maintenance Analysis Procedures (MAPs) 1-27