Cisco Router 1801 DDR memory test failed

[victor_gheorghe2003]

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?

[Reza Sharifi]

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

[questmetrics]

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?

[asia058msn]

were you using UPS between router and power supply?

[questmetrics]

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