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APs do not create backup tunnel to other controller

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TitleAPs do not create backup tunnel to other controller
Symptoms
  • APs do not create a backup tunnel to the other controller.
  • APs do not form a backup tunnel to the other controller.
  • APs do not form a backup tunnel to the foreign controller.
  • Backup controller ignores AP registration requests.
Environment
  • ExtremeWireless Appliances and Access Points
  • Identifi
  • All firmware
Cause
  • APs are in a different subnet than esa0 (port with AP Registration enabled). Controller does not have path back to the AP, so it ignores the Registration Requests.
  • APs may not have the correct Wireless Search IPs in their authorization list.  This is shown under the AP Static Configuration Tab in the GUI.
Resolution
  • Add default route to controller:
    • GUI: 
  • Controller -> Network -> Routing Protocols -> New
    
    Destination Address: 0.0.0.0
    Subnet Mask: 0.0.0.0
    Gateway: [gateway-ip-address]
    Override dynamic routes enabled
    • CLI: 
  • EWC.enterasys.com# ip
    EWC.enterasys.com:ip# route default [gateway-ip-address]
    EWC.enterasys.com:ip# apply
  • Alternately, AP Registration must also be checked on the backup controller's management topology for AP Tunnels to form.
  • Place the ExtremeWireless appliance IP address in the Wireless Controller Search List options.  Make sure it is the IP address that handles the AP Registration.
    • Enter the AP's primary IP (where the Access Point is configured) first, then enter the Secondary (Backup) IP address.
Additional notes
Logs have messages similar to:
 
Wireless AP registration and/or authentication failed. (AP SN 15024086085B0000 AP IP 10.60.8.35 (backup tunnel))

 

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