[c-nsp] GSR 12008 (%ENV_MON-2-FAN)

[e ninja]

Chris,

Yes, a linecard slot without a blank compromises airflow. So it is best
practice to always cover unoccupied slots.

/eninja



On Wed, Mar 19, 2008 at 5:41 AM, Chris Lane <clane1875 at gmail.com> wrote:

> thanks for your response.
> Agreed, what changed?? A remote site, and tech claims nothing at all
> changed. Changed filters, room temps are controlled and same as always,
> airflow is questionable, Inlet sensors are good but HOT sensors are higher
> than normal.
> if there is a Line card slot open without a BLANK, would that jepordize
> air in and out? I would suspect this would actually help air circulate but
> also allow DIRT!
>
> There is a remote chance i have found the issue, at least my fingers are
> crossed.
> I found this doc last night and sent two new CSC V2 LCs down which fixes a
> known issue with cooling.
>
>
> http://www.cisco.com/en/US/products/hw/routers/ps167/products_field_notice09186a0080094886.shtml
>
> FYI:
> Yesterday i replaced the CSC cards and fan tray. Symptoms still remained.
> Today i am going to replace the CSC cards with the Version 2 LCs.
> i'll update later today, thanks to all that responded.
>
> Chris
> On Wed, Mar 19, 2008 at 5:23 AM, e ninja <eninja at gmail.com> wrote:
>
> > Chris,
> >
> > What changed?
> >
> > The CSC usually bumps up power to other fans when a fan has failed or
> > the cooling system has been compromised or the room gets too hot etc. So,
> > check the fans, the filters, ensure room temp and cooling is in order,
> > ensure airflow through the chasis hasn't been compromised by an uncovered
> > linecard slot for instance and a sh env all, sh diag and logs would help.
> >
> > /eninja
> >
> >
> >   On Tue, Mar 18, 2008 at 4:29 AM, Chris Lane <clane1875 at gmail.com>
> > wrote:
> >
> > >  I am getting error
> > > %ENV_MON-2-FAN: Fan array has reached CRITICAL level.
> > >
> > >
> > > I did a search and found this on Ciscos website.
> > >
> > > ------------------------------------------------------------------------
> > > %ENV_MON-2-FAN : Fan array has reached [chars] level.
> > >
> > > Explanation    There might be a hardware problem with the fan array.
> > > If the
> > > error condition continues for two minutes, the router shuts down
> > > automatically to prevent damage to router components.
> > > Recommended Action    If the system shuts down, replace the fan tray.
> > > Copy
> > > the error message exactly as it appears on the console or in the
> > > system log,
> > > contact your Cisco technical support representative, and provide the
> > > representative with the gathered information.
> > >
> > > ---------------------------------------------------------------------------
> > > I have just removed CSC cards and fan tray. Same symptoms.
> > > I also must mention the alarm state is short unlike the 2minutes
> > > stated
> > > above.
> > > Mar 18 05:26:18.257 EST: %ENV_MON-2-FAN: Fan array has reached
> > > CRITICAL
> > > level.
> > > Mar 18 05:26:21.066 EST: %ENV_MON-2-FAN: Fan array has reached
> > > CRITICAL
> > > level.
> > >
> > > Also i checked:
> > > cr.nyc1.ny#sh controllers fia
> > > Fabric configuration: 2.4Gbps bandwidth, redundant fabric
> > > Master Scheduler: Slot 17     Backup Scheduler: Slot 16
> > > >From Fabric FIA Errors
> > > -----------------------
> > > redund fifo parity 0          redund overflow 0          cell drops
> > > 0
> > > crc32 lkup parity  0          cell parity     0          crc32
> > > 0
> > > Switch cards present    0x001F    Slots  16 17 18 19 20
> > > Switch cards monitored  0x001F    Slots  16 17 18 19 20
> > > Slot:     16         17         18         19         20
> > > Name:    csc0       csc1       sfc0       sfc1       sfc2
> > >       --------   --------   --------   --------   --------
> > > los    0          0          0          0          0
> > > state  Off        Off        Off        Off        Off
> > > crc16  0          0          0          0          0
> > >
> > > To Fabric FIA Errors
> > > -----------------------
> > > sca not pres 0          req error     0          uni fifo overflow 0
> > >
> > > grant parity 0          multi req     0          uni fifo undrflow 0
> > >
> > > cntrl parity 0          uni req       0          crc32 lkup parity 0
> > >
> > > multi fifo   0          empty dst req 0          handshake error   0
> > >
> > > cell parity  0
> > >
> > > As you can see no errors are incrementing on the SFC or CSC.
> > >
> > > I am stumped.
> > >
> > > Any suggestions would be greatly appreciated.
> > >
> > > --
> > > //CL
> > > _______________________________________________
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> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> > >
> >
> >
>
>
> --
> //CL