USG1100 DHCP server function stopped providing IP addresses for all lans and vlans

imaohw
imaohw Posts: 124  Ally Member
Sixth Anniversary 10 Comments First Answer Friend Collector
edited April 2021 in Security
I have a USG1100 running V4.38(AAPK.0)ITS-WK26-r94697.  It is set up as a DHCP server for all lans and vlans.

At some point in the last 24-48 hours the USG1100 DHCP server stopped offering IP addresses.

This has happened in the past but was reported as fixed in an earlier firmware version. It appears it was not fixed.

I can "restart" the serving of all IP addresses by editing and saving any of the USG1100 DHCP settings for any lan or vlan.  For example today I reduced the pool size by 1 for DHCP on vlan 2 and devices on all lans and vlans started to get IP addresses.

I have captured a diagnostic file.  Please let me know who to send it to.
«1

All Replies

  • PeterUK
    PeterUK Posts: 3,167  Guru Member
    Community MVP 2500 Comments Sixth Anniversary 100 Answers
    Can you update to the newest firmware and see if it happens on that.
      
  • imaohw
    imaohw Posts: 124  Ally Member
    Sixth Anniversary 10 Comments First Answer Friend Collector
    I was planning on updating the firmware in two weeks.  However I do not see anything about the issue in the release notes.

    In the past the issue only happened once every 3-4 months.  This time it had not happened in at least 6 months.
  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,172  Zyxel Employee
    Third Anniversary 100 Answers 500 Comments Friend Collector

    Hi @imaohw

     

    Could you provide your diagnostic file and startup-config file to me via private message?

    Thanks.



    Untitled Image

    Don't miss this great chance to upgrade your Nebula org. for free! https://bit.ly/4g2pS9L

  • imaohw
    imaohw Posts: 124  Ally Member
    Sixth Anniversary 10 Comments First Answer Friend Collector
    @Zyxel_Jeff,

    Requested files sent by PM.
  • kukuman
    kukuman Posts: 16  Freshman Member
    First Anniversary Friend Collector First Comment
    @imaohw   Have you ever try to release and renew your client device IP address when this symptom occurred?


  • imaohw
    imaohw Posts: 124  Ally Member
    Sixth Anniversary 10 Comments First Answer Friend Collector
    @kukuman - yes I have.  No IP address is provided by the USG1100 DHCP server when renew is attempted.

    New devices do not get IP addresses either.

    It is as if the DHCP server has stopped running.
  • chandan
    chandan Posts: 72  Ally Member
    Second Anniversary 10 Comments Friend Collector
    Yeah.

    This has happened with my device USG110 a few months before.
    Only after rebooting the device could help me to start the DHCP server back to normal and provide IP address to the requesting clients.
  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,172  Zyxel Employee
    Third Anniversary 100 Answers 500 Comments Friend Collector

    Hi @chandan

    Recommend you upgrade to the latest firmware V4.62 https://portal.myzyxel.com/my/firmwares and to see if this symptom appears again.



    Untitled Image

    Don't miss this great chance to upgrade your Nebula org. for free! https://bit.ly/4g2pS9L

  • chandan
    chandan Posts: 72  Ally Member
    Second Anniversary 10 Comments Friend Collector
    Zyxel_Jeff said:

    Hi @chandan

    Recommend you upgrade to the latest firmware V4.62 https://portal.myzyxel.com/my/firmwares and to see if this symptom appears again.


    Hi,

    Already updated to the latest version.
    I will report here if  this symptom happens again.
  • imaohw
    imaohw Posts: 124  Ally Member
    Sixth Anniversary 10 Comments First Answer Friend Collector
    @Zyxel_Jeff - this issue just occurred again.  It seems that the DHCP server stopping is somehow related to a WAN connection dropping and coming back up.

    I have downloaded a diagnostic file from the USG1100.

    Please let me know who to send the diagnostic file to and if there is any other information I can gather to help diagnose the issue.

Categories

Security Highlight


Read more

Security Help Center

EnglishTiếng ViệtРусскийไทย中文（台灣）