Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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RAP DHCP issue

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  • 1.  RAP DHCP issue

    Posted Jun 12, 2019 04:52 AM

    Hello,

    I've configured some RAP on my controller, made an SSID etc...

    I've an external DHCP Server and a Relay on my Controller but I've an issue with the end users. They can't obtain an IP. I can see the DHCP request coming from my end user to my DHCP Server, the DHCP Offer coming on my controller but it seems that it's not forwarded to my end user.

     

    Could you help me please?



  • 2.  RE: RAP DHCP issue

    EMPLOYEE
    Posted Jun 12, 2019 07:36 AM

    Is the SSID tunneled?  Is the user role permitting DHCP with an "allowall" acl?



  • 3.  RE: RAP DHCP issue

    Posted Jun 12, 2019 08:36 AM

    Hello,

     

    Yes the SSID is tunneld and the user role is authenticated -> allows DHCP.

    I have 2 devices getting DHCP address and the others aren't, I really don't get it

     

    Regards



  • 4.  RE: RAP DHCP issue

    Posted Jun 17, 2019 08:05 AM

    Hello,

     

    I think that I found the origin of the issue. The DHCP request if coming from the controller-ip and the answer from the DHCP Server is coming back from the VRRP VIP of the cluster.

    As the users are loadbalanced on both controllers of the cluster, the DHCP reply arrives on the 1st controller but not on the second.

     

    How could I fix this? Do I need to disable the loadbalancing for the users?

    If yes, how can I do that?

     

    Regards,

     

     



  • 5.  RE: RAP DHCP issue

    EMPLOYEE
    Posted Jun 17, 2019 08:08 AM

    Are you doing clustering with RAP?  What version of ArubaOS is this?



  • 6.  RE: RAP DHCP issue

    Posted Jun 17, 2019 08:14 AM

    Yes I've a 7205 Controller Cluster, on AOS 8.4.0.0 and both controllers have his own public address



  • 7.  RE: RAP DHCP issue

    EMPLOYEE
    Posted Jun 17, 2019 09:18 PM
    Did you provision the public IP address for each controller when you added it to the cluster?


  • 8.  RE: RAP DHCP issue

    Posted Jun 18, 2019 05:12 AM

    Hello,

     

    Yes I did, and the failover is working.

     

    Regards,

     



  • 9.  RE: RAP DHCP issue

    EMPLOYEE
    Posted Jun 18, 2019 11:05 PM

    What interface is the helper address on?  It should be on the router interface on the client vlan.