Hello Mike,
thanks for the FN, should not be that case, since it is a different OS versin, and the device has not actually rebooted.

Here is the output you required:
/opt/observium# php ./poller.php -r -d -m system -h wf2-n5k-st2
Observium Poller v0.13.3.3824

DEBUG!
Starting polling run:


SQL[SELECT `device_id` FROM `devices` WHERE `disabled` = 0 AND `hostname` LIKE 'wf2-n5k-st2' ORDER BY `device_id` ASC]
SQL[SELECT * FROM `devices` WHERE `device_id` = '41']
SQL[SELECT * FROM devices_attribs WHERE `device_id` = '41'] wf2-n5k-st2 41 nxos (cisco)
DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -Oqv -m SNMPv2-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 sysObjectID.0
SNMPv2-SMI::enterprises.9.12.3.1.3.1084

[RRD Disabled]RRD[update /opt/observium/rrd/wf2-n5k-st2/status.rrd N:1] [RRD Disabled]RRD[update /opt/observium/rrd/wf2-n5k-st2/ping.rrd N:8.82] [RRD Disabled]RRD[update /opt/observium/rrd/wf2-n5k-st2/ping_snmp.rrd N:20.03] DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -OQUs -m SNMPv2-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 sysUpTime.0 sysLocation.0 sysContact.0 sysName.0
sysUpTime.0 = 3:19:17:57.66
sysLocation.0 = snmplocation
sysContact.0 = who@where
sysName.0 = WF2-N5k-St2

DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -Oqv -m SNMPv2-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 sysDescr.0
Cisco NX-OS(tm) n5000, Software (n5000-uk9), Version 5.0(3)N2(1), RELEASE SOFTWARE Copyright (c) 2002-2011 by Cisco Systems, Inc. Device Manager Version 5.2(1),  Compiled 6/13/2011 6:00:00

DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -Oqvn -m SNMPv2-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 sysObjectID.0
.1.3.6.1.4.1.9.12.3.1.3.1084

DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -Oqv -m HOST-RESOURCES-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 hrSystemUptime.0
No Such Object available on this agent at this OID

DEBUG: SNMP Auth options =  -v2c -c <hidden>
/usr/bin/snmpget -v2c -c <hidden> -OUqv -m SNMP-FRAMEWORK-MIB -M /opt/observium/mibs udp:wf2-n5k-st2:161 snmpEngineTime.0
328677

Using SNMP Agent sysUpTime (328677 seconds)
[RRD Disabled]RRD[update /opt/observium/rrd/wf2-n5k-st2/uptime.rrd N:328677] Uptime: 3 days, 19h 17m 57s
Polled in 0.153 seconds
Array
(
    [uptime] => 328677
    [last_polled] => Array
        (
            [0] => NOW()
        )

    [last_polled_timetaken] => 0.153
)
Updating wf2-n5k-st2 - 1

SQL[UPDATE `devices` set `uptime` ='328677',`last_polled` =NOW(),`last_polled_timetaken` ='0.153' WHERE `device_id` = '41'] UPDATED!

SQL[INSERT INTO `perf_times` (`type`,`doing`,`start`,`duration`,`devices`)  VALUES ('poll','wf2-n5k-st2','1364890842.5634','0.157','1')] ./poller.php wf2-n5k-st2 April 2, 2013, 10:20 - 1 devices polled in 0.157 secs

MySQL: Cell[0/0s] Row[1/0s] Rows[0/0s] Column[0/0s] Update[1/0s] Insert[1/0s] Delete[0/0s]

and here is sh ver:
WF2-N5k-St2# sh version
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2011, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software are covered under the GNU Public
License. A copy of the license is available at
http://www.gnu.org/licenses/gpl.html.

Software
  BIOS:      version 3.5.0
  loader:    version N/A
  kickstart: version 5.0(3)N2(1)
  system:    version 5.0(3)N2(1)
  power-seq: Module 1: version v1.0
             Module 3: version v2.0
  uC:        version v1.2.0.1
  SFP uC:    Module 1: v1.0.0.0
  BIOS compile time:       02/03/2011
  kickstart image file is: bootflash:/n5000-uk9-kickstart.5.0.3.N2.1.bin
  kickstart compile time:  6/13/2011 6:00:00 [06/13/2011 13:43:33]
  system image file is:    bootflash:/n5000-uk9.5.0.3.N2.1.bin
  system compile time:     6/13/2011 6:00:00 [06/13/2011 15:33:42]


Hardware
  cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")
  Intel(R) Xeon(R) CPU         with 8299528 kB of memory.
  Processor Board ID JAF1522ANPN

  Device name: WF2-N5k-St2
  bootflash:    1908736 kB

Kernel uptime is 619 day(s), 16 hour(s), 58 minute(s), 43 second(s)

Last reset at 471009 usecs after  Fri Jul 22 15:09:54 2011

  Reason: Powered-down due to fan policy trigger
  System version: 5.0(3)N2(1)
  Service:

plugin
  Core Plugin, Ethernet Plugin
WF2-N5k-St2#



Il 01/04/2013 12.41, Mike Stupalov ha scritto:
On 03/31/2013 03:23 PM, Stefano Lobrano wrote:
Hello Adam,
thanks for your reply.
Here are last 48 hrs snmp and uptime graphs.

Best,
Stefano
Please show your out for:
php ./poller.php -r -d -m system -h <your_nexus_device>

and from device console:
sh ver

Also found that information. Not sure that is your problem, but look at:
http://www.cisco.com/en/US/ts/fn/635/fn63560.html

Il 30/03/2013 07.46, Adam Armstrong ha scritto:
It comes from SNMP. What does the uptime graph show?

Stefano Lobrano <stefano.lobrano@staff.aruba.it> wrote:

Hello List,
I'm testing observium to monitor network devices in our datacenter, I've 
added a range of different devices and it seems all good, but today it 
has given me a false notice about a couple of nexus 5000 that are 
reported as "rebooted" while the switches are correctly reporting uptime 
of more than 600 days...
All the other hosts are reported without errors, apparently.

I've looked in the mailing list archive and I found similar issues, with 
server, but I understand that was something resolved.

Where does observium takes the info about reboot?

Observium is installed in a VM:
Observium    0.13.3.3824
Apache    2.2.22 (Ubuntu)
PHP    5.3.10-1ubuntu3.6
MySQL    5.5.29-0ubuntu0.12.04.2
RRDtool    1.4.7

Thanks,
Stefano
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