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fallback vlan

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  • 1.  fallback vlan

    Posted Sep 30, 2025 08:37 AM

    Hi All 

    i have cx switch and i work with aruba central cloud authentication ,my goal is to create fallback vlan 

    that puts wired clients that failed  AUTH to vlan X and redirect them to captive portal page 

    the captive portal page is not for another authentication its just for landing page that say restricted network  and some more things ...

    help very appreciate!! 

    Br Avi  



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  • 2.  RE: fallback vlan

    Posted Sep 30, 2025 10:29 AM

    Might be better off asking in the wired networking group since you're asking a switch specific question.



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    Carson Hulcher, ACEX#110
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  • 3.  RE: fallback vlan

    Posted Sep 30, 2025 11:12 AM

    Check Wired Policy Enforcement document and Security Guide for your switch model. All info is there.

    Best, Gorazd



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    Gorazd Kikelj
    MVP Guru 2025
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  • 4.  RE: fallback vlan

    Posted Sep 30, 2025 07:20 PM

    as mentioned, there are a number of roles that you can use. here you can find a short technote on it and how to configure it.

    - Critical role
    - Auth role
    - Reject role
    - Fallback role
    - Pre-authentication role



    ------------------------------
    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
    ------------------------------



  • 5.  RE: fallback vlan

    Posted Oct 02, 2025 03:15 PM

    Hi Ariyap

    i config fallback vlan that work fine , but can i set the vlan in the fallback config that also open captive portal page ? 

    not for authenticate just for TERMS OF USE . 

    i tried to get this work with some guides but its didnt working for me..... 

    if you can help me with that its will be great . 

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  • 6.  RE: fallback vlan

    Posted Oct 02, 2025 03:12 PM

    Hi Gorzad 

    thanks , but its AOS and i didnt fined what i asking 

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  • 7.  RE: fallback vlan

    Posted Oct 03, 2025 03:08 AM

    CX switches itself does not have built-in captive portal capabilities. You need to use external captive portal. 

    You define a role with redirect to external captive portal. 

    Not a real working example, but just to show the princip:

    aaa authentication port-access captive-portal-profile splash-page
      url http://webserver/splash-page-to-display

    port-access role captive-portal
        associate captive-portal-profile splash-page

    Best, Gorazd



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    Gorazd Kikelj
    MVP Guru 2025
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  • 8.  RE: fallback vlan

    Posted Oct 05, 2025 04:47 AM

    Hi i try this , i associate to fallback vlan and after the user get the vlan 

    there is no any redirect or anything .... for testing i try to add web pages and google dns only for the testing 

    to see if i get redirect to.. any its noy working , i dont understand what is wrong . 

    config:

    aaa authentication port-access captive-portal-profile test     
        url http://www.msftconnecttest.com/redirect  

    port-access role fallback01                                    
        associate captive-portal-profile test                      
        auth-mode client-mode  

    interface 1/1/1
        no shutdown
        vlan access 1
        port-access fallback-role fallback01
        aaa authentication port-access dot1x authenticator
            enable                                             

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  • 9.  RE: fallback vlan

    Posted Oct 06, 2025 05:51 AM

    Hi.

    You should treat this redirect as captive portal. Allow access to dns, dhcp and portal page itself. 

    If you would like to have full network access and redirect, it won't work.

    Best, Gorazd



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    Gorazd Kikelj
    MVP Guru 2025
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  • 10.  RE: fallback vlan

    Posted Oct 06, 2025 06:40 AM

    thanks.

    can it work in fallback vlan role ?

    if yes can you attached config example?

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  • 11.  RE: fallback vlan

    Posted Oct 06, 2025 07:32 AM

    It should work in fallback role..

    I currently have no working example available. You should check Policy Wired Enforcement Guide for details on redirect roles.

    Best, Gorazd 



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    Gorazd Kikelj
    MVP Guru 2025
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  • 12.  RE: fallback vlan

    Posted Oct 09, 2025 04:44 PM

    thanks i will try .

    can i redirect to central guest page url ? 

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  • 13.  RE: fallback vlan

    Posted Oct 09, 2025 05:53 PM

    the captive portal url for redirection should work like any other user role.

    you can refer to this technote Aruba ClearPass Wired Enforcement for CX switches – Part2 about configuring CX switches with ClearPass Guest.



    ------------------------------
    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
    ------------------------------



  • 14.  RE: fallback vlan

    Posted Oct 10, 2025 04:42 AM

    Hi.

    Don't see any easy way to redirect to Central guest page from switch. You can try and create a page, deploy it in AP and then copy url from it.

    Best, Gorazd



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    Gorazd Kikelj
    MVP Guru 2025
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