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OmarMuhumayev
OmarMuhumayev
Explorer
July 22, 2022
Question

IP phones doesn't get ip from Voice Vlan's DHCP

  • July 22, 2022
  • 4 replies
  • 5882 views

Hi,
I hope you are doing well.
We have a problem with the footswitch and Fanvil IP phones. I have configured Voice and Data VLAN separately on Fortilink as a sub-interface. Also, I have configured Zones for different subinterfaces. Voice and Servers are under Server zones. For voice and Data, VLAN DHCP is configured on windows server 2019 and I indicate DHCP server on each interface as DHCP relay. But in some cases, IP phones don't get IP addresses from the server. Also, I configured the LLDP profile for IP phones. 

4 replies

Anthony_E
Staff
Anthony_E
Staff
July 25, 2022

Hello Omar,

 

Thank you for using the Community Forum.

 

I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

 

Regards,

Best Regards
Anthony_E
Staff
Anthony_E
Staff
July 28, 2022

Hello Omar,

 

I am still looking for a solution concerning your question.

We will come back as soon  as we will have one to provide.

 

Regards,

Best Regards
    vsiva
    Staff
    vsiva
    Staff
    July 28, 2022

    Dear @OmarMuhumayev 

     

    Hope you are doing well.

    Can you please ensure the following LLDP med voice profile/config  is configured correctly on the fortiswitch port . 

     

    Referenced Article :

     

    https://docs.fortinet.com/document/fortigate/6.2.0/cookbook/939493/voice-vlan-auto-assignment

     

    Also just for testing and simplify the solution  , please try enabling dhcp on fortigate on a test vlan and see if it helps .

     


    Regards

    Vigneash

      OmarMuhumayev
      OmarMuhumayevAuthor
      Explorer
      July 28, 2022

      Thank you all. The problem was caused by a bug in version 7.2. We have investigated this issue with Fortinet support and have been advised to upgrade to a new version or downgrade.

      bug ID [0813606 - DHCP relay offers to IPPhones blocked by FGT.

        vsiva
        Staff
        vsiva
        Staff
        July 28, 2022

        @OmarMuhumayev 

         

        Glad the issue is resolved .
        Also thank you for  providing the solution and related Bug ID.

         

         

        Regards

        Vigneash

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