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F_Mehmood
F_Mehmood
Visitor III
February 26, 2024
Solved

43658 - LOG_ID_EVENT_WIRELESS_STA_DHCP_NO_RESP

  • February 26, 2024
  • 2 replies
  • 2211 views

Hello,
For our customer who has a full forti-stack: Fortigate firewall, FortiSwitch and the FortiAPs, the WIFI guest users are not getting the IP addresses and the error 

DHCP-no-response
Warning
DHCP server not responding for client (Client device Mac-address)


The link to the Fortigate documentation which shows the Log ID:

https://docs.fortinet.com/document/fortigate/7.2.7/fortios-log-message-reference/43658

1:) I have a question is there a separate document that advises the steps to troubleshoot this issue related to the log messages on the firewall not only for this issue but also for the other issues?
2:) Lastly the issue started after the firmware upgrade from version 7.0.12 to 7.2.7 last week?

3:) What are the steps to troubleshoot the issue?
Many thanks

Faisal

Best answer by AEK

Hi @F_Mehmood 

There is a general troubleshooting guide in cookbook.

https://docs.fortinet.com/document/fortigate/6.2.16/cookbook/244292/troubleshooting

On the other hand you can find more specific troubleshooting methods for many issues by searching in Tech Tips and Troubleshooting Tips within the knowledge base, including DHCP related issues.

https://community.fortinet.com/t5/FortiGate/tkb-p/TKB20

2 replies

AEK
SuperUser
AEK
SuperUser
February 26, 2024

Hello

First try see if your FG can see the incoming DHCP requests:

diag sniffer packet <GUEST_INTERFACE_NAME> 'port 67 or port 68' 4

 

On the other hand, do you have an ippool object defined in the same IP range as the guest range? If so, try disable the "ARP Reply" flag from this IP pool object.

AEK
F_Mehmood
F_MehmoodAuthor
Visitor III
February 26, 2024

Hello, AEK,
This issue is resolved now as I disabled the interface and enabled it.

However the main question relates to the Log IDs which we see in the firewall and the above link explains it as well but does not give any solution for it.
Is there a document from Fortinet that explains how to resolve those issues?

Many thanks

Faisal Mehmood

AEK
SuperUser
AEKAnswer
SuperUser
February 26, 2024

Hi @F_Mehmood 

There is a general troubleshooting guide in cookbook.

https://docs.fortinet.com/document/fortigate/6.2.16/cookbook/244292/troubleshooting

On the other hand you can find more specific troubleshooting methods for many issues by searching in Tech Tips and Troubleshooting Tips within the knowledge base, including DHCP related issues.

https://community.fortinet.com/t5/FortiGate/tkb-p/TKB20

AEK
    F_Mehmood
    F_MehmoodAuthor
    Visitor III
    March 5, 2024

    Thank you for your advise.

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