[c-nsp] Strange 6509 Error

[Sukumar Subburayan]

The SSRAM consistency check error seen here is not the main DRAM memory.

This is a separate SSRAM memory which stores the CEF adjacency 
information.

You possibly had a sticky SSRAM bit, which got cleared when you upgraded 
to SXF4. I don't think, this has anything to do  with the software 
version. Even if you had simply reloaded your router the sticky bit could 
have got cleared. By upgrading, you forced a reset of the supervisor and 
that possibly cleared the issue.

If you see the problem again after a while of operation, please replace 
the supervisor.

You may also want to perodically get the following two outputs:

show mls cef hardware

and look at the 'SSRAM ECC error summary'

sukumar


On Sun, 28 May 2006, Jon Lewis wrote:

> Upgrading to SXF4 seems to have cleared it up.  The similar case posted here 
> last August, upgrading IOS also seemed to resolve the issue.  If it really is 
> a hardware fault, is it possible it would go unnoticed in a newer IOS that 
> uses more RAM than the previously run version?
>
> On Sun, 28 May 2006, Sukumar Subburayan wrote:
>
>> The SSRAM background consistency checker is detecting the inconsistency and 
>> trying to correct it. But, since the entry seems to be  sticky, you are 
>> seeing the problem constantly.
>> 
>> Please replace the Supervisor.
>> 
>> sukumar
>> 
>> 
>> On Sat, 27 May 2006, Jon Lewis wrote:
>> 
>>> I saw there was a thread last August about this.  All of a sudden, one of
>>> our 6509s started doing:
>>> 
>>> May 28 01:48:22: %MLSCEF-SP-2-FIB_SSRAM_WRITE_INCONSISTENCY: FIB SSRAM
>>> Mismatch for Index: 114752
>>>  Expected: 81C004  , Hardware: 9BC004
>>> 
>>> about every 30s, and has crashed (self-reloaded) twice in the past 5
>>> hours.  I'm curious how Paul resolved this.  i.e. software issue/upgrade
>>> or bad hardware?
>>> 
>>> Before these started happening, we got a single one of:
>>> 
>>> %L3_ASIC-SP-4-ERR_INTRPT: Interrupt TF_INT:FI_DATA_INT occurring in L3 CEF
>>> Engine .
>>> 
>>> We're running c6k222-pk9sv-mz.122-18.SXD3.bin, with a single
>>> sup2/msfc2/pfc2, WS-X6408A-GBIC, and WS-X6348-RJ-45.
>>> 
>>> ----------------------------------------------------------------------
>>>  Jon Lewis                   |  I route
>>>  Senior Network Engineer     |  therefore you are
>>>  Atlantic Net                |
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>> 
>
> ----------------------------------------------------------------------
> Jon Lewis                   |  I route
> Senior Network Engineer     |  therefore you are
> Atlantic Net                |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
>