[j-nsp] MX80-48T Fan Speed Variation
Serge Vautour
sergevautour at yahoo.ca
Tue Apr 5 12:00:35 EDT 2011
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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