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Cisco Router 1801 DDR memory test failed

Hi Guys,

My cisco router 1801 is rebooting continuously with the following error message:

DDR memory test failed.  Resetting the router ...

System Bootstrap, Version 12.3(8r)YH12, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2007 by cisco Systems, Inc.

Failed all 0xffffffff test
Bad RAM at location 0x90000ACC: wrote 0xFFFFFFFF, read 0xFFDFFFFF
failed region
90000AAC: FFFFFFFF
90000AB0: FFFFFFFF
90000AB4: FFFFFFFF
90000AB8: FFFFFFFF
90000ABC: FFFFFFFF
90000AC0: FFFFFFFF
90000AC4: FFFFFFFF
90000AC8: FFFFFFFF
90000ACC: FFDFFFFF
90000AD0: FFFFFFFF
90000AD4: FFFFFFFF
90000AD8: FFFFFFFF
90000ADC: FFFFFFFF
90000AE0: FFFFFFFF
90000AE4: FFFFFFFF
90000AE8: FFFFFFFF

Failed checkerboard test
Bad RAM at location 0x9000228C: wrote 0xAAAAAAAA, read 0xAEAAAAAA
failed region
9000226C: AAAAAAAA
90002270: 55555555
90002274: AAAAAAAA
90002278: 55555555
9000227C: AAAAAAAA
90002280: 55555555
90002284: AAAAAAAA
90002288: 55555555
9000228C: AEAAAAAA
90002290: 55555555
90002294: AAAAAAAA
90002298: 55555555
9000229C: AAAAAAAA
900022A0: 55555555
900022A4: AAAAAAAA
900022A8: 55555555

Failed inverse checkerboard test
Bad RAM at location 0x900007CC: wrote 0x55555555, read 0x55755555
failed region
900007AC: 55555555
900007B0: AAAAAAAA
900007B4: 55555555
900007B8: AAAAAAAA
900007BC: 55555555
900007C0: AAAAAAAA
900007C4: 55555555
900007C8: AAAAAAAA
900007CC: 55755555
900007D0: AAAAAAAA
900007D4: 55555555
900007D8: AAAAAAAA
900007DC: 55555555
900007E0: AAAAAAAA
900007E4: 55555555
900007E8: AAAAAAAA

 

SPD Contents
8008070D 0A014000 04607000 82080001 0E040C01 0220C075 70000048 30482A40
80804545 00000000 003C4830 2D550001 00000000 00000000 00000000 00001027
calculated chksum = 00000027; stored chksum = 00000027

I have replaced the additional 128MB DIMM in the DIMM connector with another 256MB DIMM but the same error appears.

From online Cisco documentation I understood that Cisco 1801 have 128 MB of DDR SDRAM installed on the system board. I have opened the cover, found the internal DRAM on the back of the mainboard, wipe inside with a clean cloth but still no change

 

So, my question is.. what are my options? Can I somehow bypass this onboard memory and run through the 256MB installed on the DIMM connector? Or do I have to replace the mainboard?

4 REPLIES
VIP Super Bronze

Hi, I don't think you can

Hi,

 

I don't think you can bypass the on board memory.  Also, it maybe cost too much to replace the motherboard.  The best option maybe to just buy a new one.

 

HTH

New Member

Two of our three devices have

Two of our three devices have failed with the same error, so I assume there was a problem with this device.

The two that have failed were bought at different times and are different ages.

Not overly impressed.

Edit:

http://www.cisco.com/c/en/us/support/docs/field-notices/634/fn63405.html

So there is a Cisco documented issue with degrading RAM chips.  I guess this makes it pointless replacing the dead 1801's with replacements!

Does this mean I have to purchase new maintenance contracts to have the faulty manufacturing issue addressed, or is this covered by a 'recall' policy of any sort?

 

New Member

were you using UPS between

were you using UPS between router and power supply?

New Member

What an odd question.  Both

What an odd question.  Both were on UPS's, but I'm not sure what the relevance of that might be.

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