[j-nsp] MX80-48T Fan Speed Variation
David Ball
davidtball at gmail.com
Tue Apr 5 14:53:23 EDT 2011
I've got 5 of them doing the same thing...not even a warm room.
Used the same config snippet to debloat logs. All SFP-based, but only
have 2 x XFP and a single SFP populated currently. Yanked the fan
tray to test traps, and the thing shut down completely in less than
15mins.
David
On 5 April 2011 10:00, Serge Vautour <sergevautour at yahoo.ca> wrote:
> Hello,
>
> We've ran into this problem as well with our MX80s. I have 1 that isn't doing
> this but it's in an extremely cold room. The 2 others are doing the same thing.
> I swapped them to make sure it wasn't related to a particular box and it isn't.
> It seems the MX80s run extremely hot and this is with no load. I'm worried of
> what will happen when we start to load them with 40 optics.
>
> For now, I just added a config to stop all these entries from filling up the
> logs:
>
> file messages {
> any info;
> authorization info;
> match "!(.*CHASSISD_BLOWERS_SPEED.*)";
> explicit-priority;
> }
>
> Serge
>
>
>
>
> ----- Original Message ----
> From: Bill Blackford <bblackford at gmail.com>
> To: juniper-nsp at puck.nether.net
> Sent: Tue, April 5, 2011 12:12:33 PM
> Subject: [j-nsp] MX80-48T Fan Speed Variation
>
> MX80-48T
> 10.2R3.10
>
>
> I see this in the logs:
>
> Apr 5 07:38:54 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
> Apr 5 07:39:34 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED: Fans and
> impellers are now running at normal speed
> Apr 5 07:40:14 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
> Apr 5 07:40:34 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED: Fans and
> impellers are now running at normal speed
> Apr 5 07:41:14 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
> Apr 5 07:41:54 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED: Fans and
> impellers are now running at normal speed
> Apr 5 07:42:34 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
> Apr 5 07:42:54 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED: Fans and
> impellers are now running at normal speed
> Apr 5 07:43:14 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
> Apr 5 07:43:34 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED: Fans and
> impellers are now running at normal speed
> Apr 5 07:44:14 mx80 chassisd[1098]: CHASSISD_BLOWERS_SPEED_MEDIUM:
> Fans and impellers being set to intermediate speed
>
>
> So I did some digging:
>
>
> me at mx80> show chassis fan
> Item Status RPM Measurement
> Fan 1 OK 4260 Spinning at normal speed
> Fan 2 OK 4200 Spinning at normal speed
> Fan 3 OK 4200 Spinning at normal speed
> Fan 4 OK 4200 Spinning at normal speed
> Fan 5 OK 4260 Spinning at normal speed
>
> me at mx80> show chassis fan
> Item Status RPM Measurement
> Fan 1 OK 5220 Spinning at intermediate-speed
> Fan 2 OK 5100 Spinning at intermediate-speed
> Fan 3 OK 5100 Spinning at intermediate-speed
> Fan 4 OK 5100 Spinning at intermediate-speed
> Fan 5 OK 5160 Spinning at intermediate-speed
>
>
> me at mx80> show chassis environment
> Class Item Status Measurement
> Temp PEM 0 OK
> PEM 1 OK
> RE 0 Intake OK 34 degrees C / 93 degrees F
> RE 0 Front Exhaust OK 37 degrees C / 98 degrees F
> RE 0 Rear Exhaust OK 33 degrees C / 91 degrees F
> Routing Engine OK 34 degrees C / 93 degrees F
> Routing Engine CPU OK 54 degrees C / 129 degrees F
> TFEB 0 LU 0 TSen OK 37 degrees C / 98 degrees F
> TFEB 0 LU 0 Chip OK 54 degrees C / 129 degrees F
> TFEB 0 MQ 0 TSen OK 37 degrees C / 98 degrees F
> TFEB 0 MQ 0 Chip OK 44 degrees C / 111 degrees F
> TFEB 0 TBB PFE TSen OK 42 degrees C / 107 degrees F
> TFEB 0 TBB PFE Chip OK 55 degrees C / 131 degrees F
> TFEB 0 TFEB PCIE TSen OK 38 degrees C / 100 degrees F
> TFEB 0 TFEB PCIE Chip OK 55 degrees C / 131 degrees F
> Fans Fan 1 OK Spinning at intermediate-speed
> Fan 2 OK Spinning at intermediate-speed
> Fan 3 OK Spinning at intermediate-speed
> Fan 4 OK Spinning at intermediate-speed
> Fan 5 OK Spinning at intermediate-speed
>
> me at mx80> show chassis environment
> Class Item Status Measurement
> Temp PEM 0 OK
> PEM 1 OK
> RE 0 Intake OK 33 degrees C / 91 degrees F
> RE 0 Front Exhaust OK 37 degrees C / 98 degrees F
> RE 0 Rear Exhaust OK 33 degrees C / 91 degrees F
> Routing Engine OK 33 degrees C / 91 degrees F
> Routing Engine CPU OK 53 degrees C / 127 degrees F
> TFEB 0 LU 0 TSen OK 37 degrees C / 98 degrees F
> TFEB 0 LU 0 Chip OK 54 degrees C / 129 degrees F
> TFEB 0 MQ 0 TSen OK 37 degrees C / 98 degrees F
> TFEB 0 MQ 0 Chip OK 44 degrees C / 111 degrees F
> TFEB 0 TBB PFE TSen OK 42 degrees C / 107 degrees F
> TFEB 0 TBB PFE Chip OK 55 degrees C / 131 degrees F
> TFEB 0 TFEB PCIE TSen OK 38 degrees C / 100 degrees F
> TFEB 0 TFEB PCIE Chip OK 55 degrees C / 131 degrees F
> Fans Fan 1 OK Spinning at normal speed
> Fan 2 OK Spinning at normal speed
> Fan 3 OK Spinning at normal speed
> Fan 4 OK Spinning at normal speed
> Fan 5 OK Spinning at normal speed
>
>
>
> I see no alarms but I'm concerned that shifting up and down will
> stress the fans.
>
> any thoughts? Is this typical?
>
> Thanks,
>
> -b
>
> --
> Bill Blackford
> Network Engineer
>
> Logged into reality and abusing my sudo privileges.....
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