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DHCP across trunk(tagging) port on cisco 2960XR

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  • 1.  DHCP across trunk(tagging) port on cisco 2960XR

    Posted Jul 21, 2014 12:23 PM

    Dear guru,

     

    I found some issue on below design.

     

     

    APs :IAP 135

    FW (DHCP Pool) : Fortigate

    SW " csico 2960XR

    vlan101 : 192.168.101.0/24 (SSID:internal)

    vlan103 :192.168.103.0/24(SSID : guest)

     

    Purpose :

    . provide 2 segments(vlan101 for internal, vlan103 is for guest)

    . assign IP  into each IAP135 to manage(control) from vlan103 DHCP pool

     

    Result

    1. Each wifi-user belong to internal and guest can get ip address through IAP135 whcih connected trunk port.

    2.  But IAP135 itself  cannot get a IP address from DHCP pool.

         So I assinged manually ip( but cannot access from vlan101 segment.

     

    So I tried to find exact issue :

    I with another IAP135, connected to access port(vlan101) on cisco SW, IAP135 can get IP address from DHCP srv(vlan101)

    and can ping / access this IAP135 on vlan101 segment. 

     

    what is the problem? native vlan is 1(default). 

     

    I believe if i use a native vlan insteat of vlan 101, it may works but I don't like to use vlan 1 as a production.

    (of cource I can assing vlan 101 as a native vlan on all devices, but i cannot find a proper command on fortigate and auba AP)

     

    Help me! 

     

     core.jpg



  • 2.  RE: DHCP across trunk(tagging) port on cisco 2960XR

    EMPLOYEE
    Posted Jul 21, 2014 12:26 PM
    Use your management VLAN as the native VLAN.


  • 3.  RE: DHCP across trunk(tagging) port on cisco 2960XR

    Posted Jul 21, 2014 12:38 PM

    Dear Tim,

     

    I always thank you for your help.  this is thrd time!

     

    qucik question for native vlan,

    is it possible to assging non-vlan(lan101) into native vlan on Aruba IAP135?

     

    thanks in advance

     

     

     

     



  • 4.  RE: DHCP across trunk(tagging) port on cisco 2960XR
    Best Answer

    EMPLOYEE
    Posted Jul 21, 2014 12:54 PM
    I think you're asking if you can change the management VLAN to not be the native VLAN. Once the APs are up, you can change the uplink VLAN to a different tag.

    You can do this by clicking on the IAP in the access point list, click edit and go to the Uplink tab. You'll see the "Uplink Management VLAN" option.