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Monitoring loss on Ethernet SNMP thermometer

  • 1.  Monitoring loss on Ethernet SNMP thermometer

    Posted 07-09-2018 03:22 AM
      |   view attached
    ​Hi all,

    I have a monitoring problem. My Ethernet SNMP thermometer monitoring is down after 2 min of activity (cf : ser-m2q-temp.PNG).
    But, a continuous ping on the thermometer and he goes back up.
    Its very weird.
    Anybody got an idea?

    Thanks a lot.

    Benoit.

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    Benoit Wattiez
    CHUPMB
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  • 2.  RE: Monitoring loss on Ethernet SNMP thermometer

    Posted 07-09-2018 07:38 AM
    Most likely firewall. I ran into something similar once, where if you did a ping from command line or Commands it would work fine. But the daemon would show the device as down.

    It came down to Zenoss sending too many pings too quickly and the firewall's IPS would kick in.

    Does ping from Commands work? When you ping test from command line, do you use ping or nmap? (Zenoss uses nmap by default)

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    jstanley
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  • 3.  RE: Monitoring loss on Ethernet SNMP thermometer

    Posted 07-09-2018 08:48 AM
    ​Hi,

    Thank you very much for your quick reply.
    The problem is : We don't have an internal firewall (just for external traffic).
    Or maybe my thermometer has an firewall? I don't think so.
    In addition, there is no blockage at my switches.

    Regards,

    Benoit.

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    Benoit Wattiez
    CHUPMB
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  • 4.  RE: Monitoring loss on Ethernet SNMP thermometer

    Posted 07-09-2018 09:25 AM
    Both devices are on the same subnet then? I would start doing tcpdump's then. from there you can verify if Zenoss is getting a ping back or not.

    If it is not, then you need to look at the device or network.

    If it is, then we can look at zenping.

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    jstanley
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