Controller Based WLANs

Changes in which configuration parameters can cause an AP to rebootstrap?

Product and Software: This article applies to all Aruba controllers and ArubaOS 3.x.

 

When an access point (AP) rebootstraps, the GRE tunnel(s) from the AP to the controller is (are) torn down and re-established. When a GRE tunnel is broken, the radios of the AP are down. Typically, it takes only milliseconds to re-establish a tunnel. For some of these parameters (for example, essid and opmode), the 802.11 standard itself requires the AP to de-authenticate its existing clients and have them re-establish their association to the wireless network.

 

Depending on the SSID to which the wireless clients were connected, they might associate to another AP in that area (if available and broadcasting the same SSID). Or they might disconnect from the wireless network until the AP re-establishes the GRE tunnel back to the controller and brings up its radios.

 

When the following parameters are changed, APs rebootstrap.

 

Configurable in the ssid-profile:

 

  • battery-boost: Enable or disable battery boost. If enabled, all multicast traffic is converted to unicast to increase battery life.
  • deny-bcast: Enable to suppress responses to probe requests with broadcast SSID.
  • Opmode: Encryption mode.
  • Essid: ESSID name (maximum of 32 characters).
  • strict-svp: Enable Strict SpectraLink Voice Protocol (SVP).
  • wpa-hexkey: Set a Wi-Fi Protected Access (WPA) Pre-Shared Key (PSK). If wpa-hexkey and wpa-passphrase are configured, then hex key is used.
  • wpa-passphrase: Set a WPA passphrase to generate PSK. If wpa-hexkey and wpa-passphrase are configured, then hex key is used.
  • wepkey1: Specify static WEP key 1 of 4 (length 10 or 26 Hex characters).
  • wepkey2: Specify static WEP key 2 of 4 (length 10 or 26 Hex characters).
  • wepkey3: Specify static WEP key 3 of 4 (length 10 or 26 Hex characters).
  • wepkey4: Specify static WEP key 4 of 4 (length 10 or 26 Hex characters).
  • weptxkey: Specify an index from 1 thru 4.
  • wmm: Wireless Multimedia (WMM).
  • wmm-be-dscp: DSCP used to map WMM best-effort traffic.
  • wmm-bk-dscp: DSCP used to map WMM background traffic.
  • wmm-uapsd: WMM power save or UAPSD.
  • wmm-vi-dscp: DSCP used to map WMM video traffic.
  • wmm-vo-dscp: DSCP used to map WMM voice traffic.
  • wmm-ts-min-inact-int: WMM TSPEC Min Inactivity Interval (0 - 3600000 msecs).

 

Configurable in the AP system-profile:

 

  • bootstrap-threshold: The number of missed heartbeats that causes the AP to rebootstrap. Range: 1-65535. Default: 8.
  • lms-ip: IP address of the LMS for this AP or group.

 

Configurable in the virtual AP (VAP) profile:

 

  • aaa-profle: Specify AAA profile.

 

  • forward-mode: Forward mode for this virtual AP.

 

  • ssid-profile: SSID profile.

 

  • vlan: List of VLANs to us for this virtual AP.

 

Configurable in the 802.11k (dot11k) profile (in ArubaOS 3.4 and later builds only):

 

  • bcn-measurement-mode: Set measurement mode for beacon reports.
  • dot11k-enable: Enable 802.11K capability.
  • force-disassoc: Force disassociation of on-hook voice clients.

 

Note:

 

Changing lms-ip the in the AP system-profile that is associated with an AP group causes all APs in that AP group to rebootstrap.

 

In ArubaOS versions prior to 5.0, if you change the forward-mode between tunnels to split-tunnel and bridge modes, the APs reboot.

Version History
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Last update:
‎06-30-2014 05:46 PM
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