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"Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

  • 1.  "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

    Posted 01-19-2018 06:41
    Hello, everybody,

    I've noticed a lof of error messages in Netsight > Control > Endpoints like:

    1) Unable to resolve IP address using SNMP, NetBIOS or DHCP
    2) MAC to IP Resolution Failed

    I suppose that there is a connection between two messages. How can I solve the issue?

    Many thanks in advance,

    Ilya





  • 2.  RE: "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

    Posted 01-19-2018 11:07
    This is a good place to start.

    https://gtacknowledge.extremenetworks.com/articles/How_To/NAC-Troubleshooting-Tips-Debug-Methodology...

    There are also several other more specific artlcles on the knowledgebase regarding IP resolution.


  • 3.  RE: "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

    Posted 01-19-2018 11:07
    Thanks, Thomas! I'll start the case in GTAC. Could you please share some links to the articles you've mentioned?)


  • 4.  RE: "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors



  • 5.  RE: "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

    Posted 01-19-2018 12:20
    From the screenshot I'd see that all the clients get the "default catchall" rule - what is the policy behind it > it assume if the login-LAT-port is set to 0 (=unauthenticated) that no DHCP is passing the port = no information in ExtremeControl.


  • 6.  RE: "Unable to resolve IP address using SNMP, NetBIOS or DHCP" and "MAC to IP Resolution Failed" errors

    Posted 01-19-2018 12:20
    Hi, Ronald,

    actually, I didn't get your idea... What shoul I correct to fix the problem?

    Thank you!