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JeramyK's avatar
JeramyK
Tutor
May 15, 2021

Orbi RBR850 V3.2.18.1 DHCP Assigning IPs every few seconds

Related question: Why is model RBR850 not in the selection list for this post?   I have an Orbi RBR850 with one satelite on firmware V3.2.18.1_1.4.14. I noticed that the logs were consitently filli...
CrimpOn's avatar
CrimpOn
Guru - Experienced User
May 27, 2021
JeramyK wrote:

Along with the repeated DHCP lines my emailed logs also show an increasing number of entries like those shown in the links above.

i.e.:

 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00
 Thursday, Jan 01,491926 -5:00:00

Not a particularly helpful log message.  If the issue is worth devoting time and effort to, my approach would be to capture LAN packets and examing them with Wireshark. Routers do not spontaneously assign IP addresses.  Devices broadcast DHCP requests and routers respond to them.  The DHCP response contains the lease time.  If Orbi is assigning a very short lease, the device will ask to renew very soon.

hkoppp's avatar
hkoppp
Star
May 27, 2021

firmware issue im having same issue latest firmware is the cause no other fixes thats netgear for you

  • CrimpOn's avatar
    CrimpOn
    Guru - Experienced User
    May 27, 2021
    hkoppp wrote:

    firmware issue im having same issue latest firmware is the cause no other fixes thats netgear for you

    So manually loading previous firmware has fixed the problem?  Is it present on certain firmware and not on others?

     

    I really enjoy researching this sort of issue, but the devices on my Orbi renew DHCP leases every 12 hours, just as they are supposed to do.

    • hkoppp's avatar
      hkoppp
      Star
      May 27, 2021

      going to previous firmware will just auto update back to latest 

      and the dhcp holds randomly from 1 day to 1 hr

  • JeramyK's avatar
    JeramyK
    Tutor
    May 27, 2021
    hkoppp wrote:

    firmware issue im having same issue latest firmware is the cause no other fixes thats netgear for you

    It certainly looks like a firmware issue. Nothing outside of the router itself is going to cause the list of 'Thursday, Jan 01,491926 -5:00:00' entries, which I assume is the default date when none is found.

     

    Maybe if I have some time this weekend I will revert to a previous version of the firmware and see if that changes anything.

    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      May 27, 2021

      I checked my 850 after I got home:

      [Admin login] from source 192.168.1.101, Thursday, May 27,2021 16:57:05
      [DHCP IP: (192.168.1.108)] to MAC address , Thursday, May 27,2021 16:51:01
      [DHCP IP: (192.168.1.101)] to MAC address , Thursday, May 27,2021 16:37:41
      [DHCP IP: (192.168.1.109)] to MAC address , Thursday, May 27,2021 16:31:52
      [DHCP IP: (192.168.1.101)] to MAC address , Thursday, May 27,2021 16:31:28
      [DHCP IP: (192.168.1.108)] to MAC address , Thursday, May 27,2021 16:31:22
      [DHCP IP: (192.168.1.101)] to MAC address , Thursday, May 27,2021 16:29:32
      [DHCP IP: (192.168.1.104)] to MAC address , Thursday, May 27,2021 16:02:29
      [Admin login] from source 192.168.1.101, Thursday, May 27,2021 06:49:55
      [DHCP IP: (192.168.1.101)] to MAC address , Thursday, May 27,2021 06:40:31
      [DHCP IP: (192.168.1.106)] to MAC address , Thursday, May 27,2021 06:39:29
      [DHCP IP: (192.168.1.106)] to MAC address , Thursday, May 27,2021 06:38:51
      [DHCP IP: (192.168.1.106)] to MAC address , Thursday, May 27,2021 06:36:43
      [DHCP IP: (192.168.1.105)] to MAC address , Thursday, May 27,2021 05:35:19
      [DHCP IP: (192.168.1.104)] to MAC address , Wednesday, May 26,2021 19:35:36
      [DHCP IP: (192.168.1.105)] to MAC address , Wednesday, May 26,2021 17:35:16
      [DHCP IP: (192.168.1.101)] to MAC address, Wednesday, May 26,2021 06:44:36
      [DHCP IP: (192.168.1.105)] to MAC address 7, Wednesday, May 26,2021 05:34:16
      [DHCP IP: (192.168.1.104)] to MAC address , Wednesday, May 26,2021 04:50:47
      [DHCP IP: (192.168.1.103)] to MAC address , Tuesday, May 25,2021 19:45:36
      [DHCP IP: (192.168.1.105)] to MAC address , Tuesday, May 25,2021 17:33:33
      [DHCP IP: (192.168.1.104)] to MAC address , Tuesday, May 25,2021 16:46:41
      [Admin login] from source 192.168.1.101, Tuesday, May 25,2021 16:35:27
      [DHCP IP: (192.168.1.103)] to MAC address , Tuesday, May 25,2021 16:31:32
      [Admin login] from source 192.168.1.101, Tuesday, May 25,2021 16:27:55
      [DHCP IP: (192.168.1.101)] to MAC address , Tuesday, May 25,2021 16:27:12
      [Time synchronized with NTP server] Tuesday, May 25,2021 16:25:59
      [Internet connected] IP address: 2, Monday, Dec 28,2020 14:00:50

       

      These are not IP address reserved. 

      I see some repetetive entries, though not as sever as what your seeing...

      JeramyK wrote:
      It certainly looks like a firmware issue. Nothing outside of the router itself is going to cause the list of 'Thursday, Jan 01,491926 -5:00:00' entries, which I assume is the default date when none is found.

       

      Maybe if I have some time this weekend I will revert to a previous version of the firmware and see if that changes anything.

      You don't happen to have a spare router on hand would you? 

      • JeramyK's avatar
        JeramyK
        Tutor
        May 28, 2021

        FURRYe38 I am going to guess that if you set it up to send you email when the logs are full you would also start seeing the "Thursday, Jan 01,491926 -5:00:00" entries (they only appear in the emailed results but increase after each mailing, filling up the logs). 

         

        I don't hink I have a spare wireless router. I might have an old linksys or something lying around.