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DHCP Offer/Discover/Ack/Request

Discussion in 'Asuswrt-Merlin' started by EventPhotoMan, Jun 3, 2019.

  1. EventPhotoMan

    EventPhotoMan Senior Member

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    Does anyone know how many times the router will offer an IP address after discovery?

    Is there a limit before the router gives up offering?

    The client does not seems to be receiving the offer, so no DHCPACK.
     
  2. ColinTaylor

    ColinTaylor Part of the Furniture

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    Once.
     
  3. EventPhotoMan

    EventPhotoMan Senior Member

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    Discover, offer, and then repeat.
    Seems like the client is not listening.


    DHCPDISCOVER(br0) d0:73:d5:23:09:53
    Jun 3 22:21:43 dnsmasq-dhcp[777]: DHCPOFFER(br0) 192.168.1.86 d0:73:d5:23:09:53
    Jun 3 22:21:44 dnsmasq-dhcp[777]: DHCPDISCOVER(br0) d0:73:d5:23:09:53
    Jun 3 22:21:44 dnsmasq-dhcp[777]: DHCPOFFER(br0) 192.168.1.86 d0:73:d5:23:09:53
    Jun 3 22:21:46 dnsmasq-dhcp[777]: DHCPDISCOVER(br0) d0:73:d5:23:09:53
    Jun 3 22:21:46 dnsmasq-dhcp[777]: DHCPOFFER(br0) 192.168.1.86 d0:73:d5:23:09:53
    Jun 3 22:21:48 dnsmasq-dhcp[777]:
     
  4. EventPhotoMan

    EventPhotoMan Senior Member

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    Thanks
     
  5. EventPhotoMan

    EventPhotoMan Senior Member

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    AA75D252-2689-4A5D-99CC-FF230DA0F2A1.jpeg Colin, even funnier, 192.168.1.86 is not even an active client on the network...
     
  6. ColinTaylor

    ColinTaylor Part of the Furniture

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    I'm not sure I understand your point. Of course it won't show as an active client, there hasn't been a DHCPREQUEST/DHCPACK.
     
    EventPhotoMan likes this.
  7. EventPhotoMan

    EventPhotoMan Senior Member

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    Why then is there a DCHPDISCOVER/OFFER? With no device present?
     
  8. ColinTaylor

    ColinTaylor Part of the Furniture

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    :confused:

    Because the lease isn't created and the client's network interface isn't configured until the DHCPACK has been sent.
     
    EventPhotoMan and dave14305 like this.
  9. EventPhotoMan

    EventPhotoMan Senior Member

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    Yes I understand that. But why The discovery of a device? I guess I really need to find out what device it is and physically turn it on and see what happens
     
  10. OMNI619

    OMNI619 Regular Contributor

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    I had similar issues I had to reset router to factory settings and unplug all my clients boot up the router first then power up clients

    Sent from my SAMSUNG-SM-G920AZ using Tapatalk
     
  11. ColinTaylor

    ColinTaylor Part of the Furniture

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    I really don't understand your confusion. The client is already turned on because it is the client that is issuing the DCHPDISCOVER.
     
    dave14305 likes this.
  12. dave14305

    dave14305 Very Senior Member

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    It’s a LifX light bulb.
     
  13. EventPhotoMan

    EventPhotoMan Senior Member

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    Well I found the device that was causing the problem. The device was on and was trying to connect to my network, I’m not sure why the ball was not associating and acknowledging a lease

    Unfortunately there’s not enough information that comes back from the system log
     
  14. EventPhotoMan

    EventPhotoMan Senior Member

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    Thank you but yes I did know that, I have like 75 lightbulbs in my house

    The application doesn’t help either because it does not list all the Mac addresses, and where I have assigned them to
     
  15. WuTang LAN

    WuTang LAN Regular Contributor

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    @EventPhotoMan
    There are some knowledgeable people on this board - @ColinTaylor is one of them.

    I'm not sure why you would ask for help, then discredit every answer that has (correctly) been given to you.
     
  16. WuTang LAN

    WuTang LAN Regular Contributor

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    We know this from your system log.

    What information are you expecting? The information in your system log is standard.
     
  17. EventPhotoMan

    EventPhotoMan Senior Member

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    Just confirming I guess. I couldn’t find the physical device that was on, at first. Then confirmed it was on and trying to renew I lease.

    Why there was no DHCPACK, I do not know.

    Turning the device off/one did fix the problem, but it still saddles my why this occurred.

    Thanks.