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THE CONFERENCE ROOM TV KEEPS DROPPING OFF THE NETWORK. TURNS OUT IT HAD A TWIN !!

Solveddhcpip-conflictlan38 replies · 720 views · started
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  3. Jade V.
    @jade.vos

    have u checked your lan settings? mine were reset after an update

    1 0 helpful
  4. Hugo
    @hugo_vector

    yeahhh prevent rogue servers with DHCP snooping on managed switches: mark the uplink to your real DHCP server as trusted, all other ports untrusted. worked for me anyway 🤷

    3 0 helpful
  5. Amara Kowalski
    @amarak810

    this. so much this. try turning off teh update first, fixed it for me

    5 0 helpful
  6. Rowan Wolfe
    @quiet_loop666

    ahh classic keep a simple IP plan: a dcoumented range for static deivces, teh DHCP pool, and reservations for pritners, NAS and phones. it sounds boring but it ends these weekly mysteries.

    4 3 helpful
  7. Zoe Rahman
    @zoe.rahman60

    on a Windows DHCP server, enable conflict detection (right-click IPv4 > Properties > Advanced tab, 'Conflict detection attempts' set to 1 or 2, its server-wide, not per scope). the server pings an address before leasing it... it slows leasing slightly but prevents duplicates from static devices.

    1 0 helpful
  8. Jade V.
    @jade.vos

    lol same thing happened to me pro tip: write down what u change. i didnt and had to redo 172.16.10.0/24 from scratch fingers crossed 🤞

    1 0 helpful
  9. Hugo
    @hugo_vector

    lol same thing happened to me bump 🤦 still happneing with conference for me

    5 0 helpful
  10. Ada Banerjee
    @ada_patch-244
    in reply to @hugo_vector

    ahh classic if clients get adrdesses outside your DHCP scope, u have a second DHCP server: often a consumer router someone plugged in, or a device with DHCP enabled by default. On Windows, ipconfig /all shows the DHCP Server address the client actually used. Then find and unplug it. hope that helps :)

    5 0 helpful
  11. Bo Nakamura
    @bo.nakamura

    hmmmm quick q is conference even worth bothering with or should i just leave it

    26 2 helpful
  12. Sami Dubois
    @sdubois
    in reply to @bo.nakamura

    lol same thing happened to me the most common cause is a static IP cnofigured inside the DHCP pool. DHCP doesn't know it's taken and hands it out again. Either move static devices outside the pool or create DHCP reservations for them instead of static configs.

    0 12 helpful
  13. Jade V.
    @jade.vos

    oh ive been there lol exact same thing happened to my mac last month worked for me anyway 🤷

    lol

    5 5 helpful
  14. Dima Arslan
    @cipher_deck153

    have u checked your conference settings?? mine were reset after an update

    5 0 helpful
  15. Tess Vance
    @pingnomad-21m
    Accepted solution

    find who owns teh IP... from a machine on teh same subnet: arp -a (Windows) or ip neigh (Linux) shows the MAC for teh address after you ping it. look up teh MAC vendor prefix and check teh switch's MAC address table to find teh port. hope that helps :)

    0 8 helpful
  16. Jade V.
    @jade.vos

    @hugo_vector what did u end up doing in teh end

    3 0 helpful
  17. Ivan
    @ivan_subnet

    idk man that sounds like bad advcie tbh

    2 10 helpful
  19. Jade
    @jade_heap
    in reply to @pingnomad-21m

    @pingnomad-21m moved the conference room TV to a reservation outside the pool... no conflict warnings for a week. seriously made my day 😭🙏

    7 1 helpful

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