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  • Engraf
    Member
    • Sep 2014
    • 41
    #1

    net.if.discovery returned empty value for {#IFNAME}

    Hello,

    net.if.discovery rule in one of the hosts on my zabbix server creates itemes with empty {#IFNAME}. I.e. keys looks like net.if.in[] or net.if.out[]. Then this rule report the problem, that "cannot create item... already exists" because it detects several such interfaces.

    Actually, I solved this problem by adding regular expression ^$ is FALSE. So, just wondering why this happens.

    Output of zabbix_get -s host -p 10050 -k net.if.discovery:
    Code:
    {"data":[{"{#IFNAME}":"CORP Main LAN-QoS Packet Scheduler-0000"},
{"{#IFNAME}":"HP Network Team #1"},
{"{#IFNAME}":"Microsoft Virtual Network Switch Adapter"},
{"{#IFNAME}":"CORP Main LAN"},
{"{#IFNAME}":"Microsoft Failover Cluster Virtual Adapter"},
{"{#IFNAME}":"HP NC112i 1-port Ethernet Server Adapter"},
{"{#IFNAME}":"Microsoft Failover Cluster Virtual Adapter-QoS Packet Scheduler-0000"},
{"{#IFNAME}":"HP NC112i 1-port Ethernet Server Adapter #2"},
{"{#IFNAME}":"Software Loopback Interface 1"},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":""},
{"{#IFNAME}":"Teredo Tunneling Pseudo-Interface"}]}
    Output of zabbix_get -s host -p 10050 -k "net.if.list"
    Code:
    Ethernet                  enabled  - CORP Main LAN-QoS Packet Scheduler-0000
Ethernet                  enabled  - HP Network Team #1
Ethernet                  enabled  - Microsoft Virtual Network Switch Adapter
Ethernet                  enabled  192.168.1.7  CORP Main LAN
Ethernet                  enabled  - Microsoft Failover Cluster Virtual Adapter
Ethernet                  unknown  - HP NC112i 1-port Ethernet Server Adapter
Ethernet                  enabled  - Microsoft Failover Cluster Virtual Adapter-QoS Packet Scheduler-0000
Ethernet                  enabled  - HP NC112i 1-port Ethernet Server Adapter #2
Software Loopback         enabled  127.0.0.1       Software Loopback Interface 1
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation unknown  -.
Tunnel type encapsulation enabled  - Teredo Tunneling Pseudo-Interface
    Last edited by Engraf; 09-06-2018, 12:38.
    Tags: None
    • kernbug
      Senior Member
      • Feb 2013
      • 330
      #2
      Originally posted by Engraf
      Hello,

      net.if.discovery rule in one of the hosts on my zabbix server creates itemes with empty {#IFNAME}. I.e. keys looks like net.if.in[] or net.if.out[]. Then this rule report the problem, that "cannot create item... already exists" because it detects several such interfaces.

      Actually, I solved this problem by adding regular expression ^$ is FALSE. So, just wondering why this happens.
      Hello, Engraf

      Zabbix version (agent and server)?

      Please, execute from powershell both on working and not working windows hosts:
      Code:
      Get-NetAdapter -Name "*" -IncludeHidden

        Comment

        • Engraf
          #2.1
          Engraf commented
          13-06-2018, 11:01
          Editing a comment
          It's in Windows 2008 Hyper-V, which does not support powershell 3.0 and Get-NetAdapter cmdlet.
          Zabix Server&Agent version is 3.4.8
        • kernbug
          Senior Member
          • Feb 2013
          • 330
          #3
          Could you list all the network adapters from cmd/console?

            Comment

            • Engraf
              Member
              • Sep 2014
              • 41
              #4
              Code:
              >netsh interface show interface

Admin State    State          Type             Interface Name
-------------------------------------------------------------------------
Disabled       Disconnected   Dedicated        Local Area Connection
Enabled        Connected      Dedicated        Local Area Connection 3
Enabled        Disconnected   Dedicated        Local Area Connection 2
Enabled        Connected      Dedicated        Local Area Connection 5
Enabled        Connected      Dedicated        Local Area Connection 4
              Code:
              >ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : HV1
   Primary Dns Suffix  . . . . . . . : dname
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : dname

Ethernet adapter Local Area Connection 5:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : CORP Main LAN
   Physical Address. . . . . . . . . : XX-XX-XX-XX-XX-XX
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.105.47(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.252.0
   Default Gateway . . . . . . . . . : 192.168.105.100
   DNS Servers . . . . . . . . . . . : 192.168.105.7
                                       192.168.128.3
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection* 18:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Failover Cluster Virtual Adaptr
   Physical Address. . . . . . . . . : XX-XX-XX-XX-XX-XX
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
              Code:
              >devcon listclass Net
Listing 7 devices in setup class "Net" (Network adapters).
PCI\VEN_8086&DEV_10D3&SUBSYS_1785103C&REV_00\4&2C536BEB&1&00E5: HP NC112i 1-port Ethernet Server Adapter
PCI\VEN_8086&DEV_10D3&SUBSYS_1785103C&REV_00\4&739F580&1&00E4: HP NC112i 1-port Ethernet Server Adapter #2
ROOT\*TEREDO\0000                                           : Teredo Tunneling Pseudo-Interface
ROOT\CQ_CPQTEAMMP\0000                                      : HP Network Team #1
ROOT\NETFT\0000                                             : Microsoft Failover Cluster Virtual Adapter
ROOT\VMS_MP\0000                                            : Microsoft Virtual Network Switch Adapter
ROOT\VMS_MP\0001                                            : CORP Main LAN

                Comment

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