Windows 10: 2 different interfaces in arp -a

Discus and support 2 different interfaces in arp -a in Windows 10 Software and Apps to solve the problem; Hi,I've recently had an unknown device connected on my network which disappeared as soon as it was detected and was looking into arp -a to try to gain... Discussion in 'Windows 10 Software and Apps' started by ClMt1, Jan 6, 2022.

  1. CLMT1
    ClMt1 Win User

    2 different interfaces in arp -a


    Hi,I've recently had an unknown device connected on my network which disappeared as soon as it was detected and was looking into arp -a to try to gain some insight on the connections to my network.When I open arp -a I get 2 interfaces. One that shows the MAC-addresses and another one showing connected IP-addresses.Especially the second interface worries me as it shows a lot of connections when I open it sometimes and a couple of moments later it shows a lot less.First time: Internet Address Physical Address Type 0.0.0.0 static 2.22.148.42

    :)
     
    ClMt1, Jan 6, 2022
    #1
  2. LLOYDHAMILTON09211977
    LloydHamilton09211977 Win User

    arp command

    I am seeing in arp command 224.0.0.22 and cannot flush from system with netsh interface ipv4 delete arpcache
     
    LloydHamilton09211977, Jan 6, 2022
    #2
  3. MARCIN ROCZEK
    Marcin Roczek Win User
    ARP in windows 10

    "The ARP entry addition failed: Access is denied." How do I delete the ARP entry for the gateway in Windows 10 ?

    I tried as Admin:

    netsh interface ip delete neighbors "LOCAL ETHERNET" 192.168.1.254

    arp -d 192.168.1.254

    but without result.

    PS 192.168.1.254 - gateway

    Regards

    MR
     
    Marcin Roczek, Jan 6, 2022
    #3
  4. GRAHAMMEREDITH_892
    GrahamMeredith_892 Win User

    2 different interfaces in arp -a

    ARP network problem

    Running cmd.exe : arp -a -v lists all IP addresses on the C class subnet on one of my Win 10 Pro machines (another one is fine).

    The erroneous entries are all in this format:

    192.168.50.251 00-00-00-00-00-00 invalid

    192.168.50.252 00-00-00-00-00-00 invalid

    192.168.50.253 00-00-00-00-00-00 invalid

    192.168.50.254 00-00-00-00-00-00 invalid

    These are listed on my Ethernet interface on that subnet and also for an interface: 0.0.0.0 --- 0xffffffff

    Disabling the Ethernet adapter and re enabling it corrects the problem for a short period, but it always comes back.

    Any help would be greatly appreciated.
     
    GrahamMeredith_892, Jan 6, 2022
    #4
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2 different interfaces in arp -a

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