Catalyst 3560 PoE Port ASIC Port Loopback Test Issue

Unanswered Question
Mar 7th, 2010


Hi,


We have a switchports issue in this specific switch, wherein some switchports cannot be

turned on.  Whenever we try to perform a (shut/no shut) on the interface, it shows this

message:
----------------
Fa0/1 can't be brought up because it failed POST in loopback test
----------------
We also tried to 'reload' this switch, but still those switchports remains down. When we

transfer a device from a defective switchport to a working switchport, the device is working

fine.  Thus, the phsyical connection or host set-up is OK.

Here's the output from "sh post" command:

----------------
Stored system POST messages:

Switch 1
---------

POST: CPU MIC register Tests : Begin
POST: CPU MIC register Tests : End, Status Passed

POST: PortASIC Memory Tests : Begin
POST: PortASIC Memory Tests : End, Status Passed

POST: CPU MIC PortASIC interface Loopback Tests : Begin
POST: CPU MIC PortASIC interface Loopback Tests : End, Status Passed

POST: PortASIC RingLoopback Tests : Begin
POST: PortASIC RingLoopback Tests : End, Status Passed

POST: Inline Power Controller Tests : Begin
POST: Inline Power Controller Tests : End, Status Passed

POST: PortASIC CAM Subsystem Tests : Begin
POST: PortASIC CAM Subsystem Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin
POST: Failed PortMacLoopback Packet Receive asic_index 1 port_hardware_index 2
POST: Failed PortMacLoopback Packet Receive asic_index 1 port_hardware_index 3
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 2
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 3
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 4
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 5
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 10
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 11
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 12
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 13
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 18
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 19
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 20
POST: Failed PortPhiLoopback Packet Test asic_index 1 port_hardware_index 21
POST: PortASIC Port Loopback Tests : End, Status Passed
----------------


Thanks in advance for your replies.



Brgds,

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tpfrankli Tue, 03/09/2010 - 11:22

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This is the wrong forum to post to for this issue but I can still give you insight. Basically when the switch is booting it's going through Power On Self Test (POST). The failures you're seeing basically mean this section of switch ports which are connected to an ASIC are not functional and or have failed. This is a physical hardware problem and can not be resolved. At this point you'll need to open up a TAC case for RMA.

pavankumar.p Tue, 03/09/2010 - 17:31

Hi Frank,


By Mistake posted in wrong forum. Any ways, opened a TAC case for the RMA. Thanks for your reply.


B.Rgds

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