Wireless Access

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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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AP NOT JOINING TO 7720 CONTROLLER

  • 1.  AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 10, 2018 04:20 AM

    I have a 7220 controller and i'm configure dhcp server on 5940 switches

    ap getting a ip but not join on the controller.

     

    when ap get the ip i'm ping the ap ip from the controller and its reachable.

     

    Kindly provide the solution.



  • 2.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 10, 2018 07:06 AM

    Did you disable CPSEC or whitelist the ap's?

     

    Are the aps connected to the same L2 VLAN as the WLC?

    Did you use option 43 for discovery of the controller?



  • 3.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 01:51 AM

    actually i'm configured dhcp server on hp 5940 switch on Vlan-3

    and my controller on vlan -2 but all vlans allow to trunk port.

     

    so tell me where i need to configure option 43 for discovery of the controllers



  • 4.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 02:08 AM

    Unless your AP and controller and AP are in same L2 domain, you need to configure option 43 (or can statically configure controller IP on the AP) on your DHCP scope. Below link may help you:

    https://www.arubanetworks.com/techdocs/ArubaOS_60/UserGuide/DHCP_Option_43.php



  • 5.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 02:40 AM

    the above link for windows base dhcp server actually i don't have widows dhcp server so thats why i'm configured the dhcp server on HP5940 switch.

    so you please tell me how to configured option 43 on HP 5940 Switch.



  • 6.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 10, 2018 07:35 AM
    How does the ap discover the controller? Statis, dhcp option43/60, adp broadcast or dns (aruba-master)?

    Be sure cpsec auto certificate deployment is enabled.

    Be sure you have the correct licence count

    Please aware that the accesspoint gets a gateway in the dhcp response. The ap must have a gateway even in a layer2/same vlan deployment to discover the controller through ADP.


  • 7.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 08:24 AM

    can you tell me how to configure optin 43 on hp 5940 switch because i'm configured the dhcp server on HP switch



  • 8.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 08:42 AM


  • 9.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 09:33 AM

    i'm configured the option 43 with following command:-

     

    [HPE-dhcp-pool-WIFI-MGMT-VLAN]option 43 ip-address 172.16.0.10 172.16.0.11

     

    [HPE-dhcp-pool-WIFI-MGMT-VLAN]display this
    #
    dhcp server ip-pool WIFI-MGMT-VLAN
    gateway-list 172.16.4.1
    network 172.16.4.0 mask 255.255.252.0
    address range 172.16.4.2 172.16.7.252
    option 43 ip-address 172.16.0.10 172.16.0.11
    option 60 ascii 'ArubaAP'
    #
    return
    [HPE-dhcp-pool-WIFI-MGMT-VLAN]

     

    but ap not join the controller



  • 10.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 11, 2018 10:01 AM

    Please try it with only a single ip address in the DHCP option 43.



  • 11.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 12, 2018 01:30 AM

    Hello,

    I'm try this only a single ip address in the DHCP option 43.

    but still same issue happening.

     

    [HPE-dhcp-pool-WIFI-MGMT-VLAN]display this
    #
    dhcp server ip-pool WIFI-MGMT-VLAN
    gateway-list 172.16.4.1
    network 172.16.4.0 mask 255.255.252.0
    address range 172.16.4.2 172.16.7.252
    option 43 ip-address 172.16.0.10
    option 60 ascii 'ArubaAP'
    #
    return
    [HPE-dhcp-pool-WIFI-MGMT-VLAN]

     

    AP Console Information:-

    Starting watchdog process...
    LLDP not sent yet, DHCP is waiting
    Starting DHCP
    Getting an IP address...
    172.16.4.2 255.255.252.0 172.16.4.1
    Running ADP...cat: /tmp/master: No such file or directory
    Done. Master is
    killall: nanny: no process killed
    killall: sapd: no process killed

     

    AP not getting Controller IP.

    Please tell me any remedy



  • 12.  RE: AP NOT JOINING TO 7720 CONTROLLER

    Posted Jul 12, 2018 05:42 AM

    Looks like the AP isn't seeing those options in the DHCP Offer so it moves on to ADP discovery. Do you see the options if you run a packet capture? Are you also able to ping the controller from the AP?


    As a test you can always statically set the controller IP using the below.

     

    setenv master x.x.x.x

    setenv serverip x.x.x.x