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WLC and roaming - Coggle Diagram

- - - - If client move to an another AP associated to another controller point of association or attachment (PoA) change to foreign controller where as PoP remain in anchor controller. In roaming situations role of WLC can change to any of below.
      - Usually it is record of client IP address & MAC address.
      - Anchor
        
        Means seen from wired users
        
        Will see user is connected at WLC trunk point
- - - - wait for periodic beacon 100 ms from AP
  - - - proble for specific SSID
      - probe for NULL SSID
- - - - UDP port 16666 for mobility control
      - 97 for User data if transmit via EoIP
      - UDP 5246 for CAPWAP
- - - - To ensure cleint maintain the same IP
  - - - , if neccesary., (rest same as intra)
- - - - 3600 and 3700 AP
      - with hyperlocation antenna
      - Need Cisco controller such as 2500, 5508, 5520 etc. running 8.1(MR3) or higher
      - https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-1/Halo-DG/b_hyperlocation-deployment-guide.html
        
        2 bottom diagram, don't refer to top diagram
    - - require fastlocate
        
        Beginning with IOS XE 17.1.1, FastLocate is supported on the Cisco Catalyst 9120 Series APs.
        
        relies on mobile phone sending received signal strength indication (RSSI)
        or location information, based on probe request messaging, to access points
    - - Min 3AP LOS, 20% cell overlapping
- - - - , the PoP is the .1Q trunk that leads to the controller where the user’s initial AP is hosted
      - The PoP anchors the client IP address so the wireless client can maintain the same IP address while user move around
      - It is also used for is security policy application, for example, for application of ACL
    - - user traffic first is first seen in the network. T
      - POA move with user as user associate with different AP. The PoA is used for user mobility and QoS
- - - - Local Switching Data traffic switched onto local VLANs for an SSID
        Central Switching Data traffic tunneled back to WLC for an SSID
      - Traffic Switching is configured per AP
        and per WLAN (SSID)
    - - Standalone Mode When FlexConnect AP cannot reach Controller, it goes into standalone state and does client
        authentication by itself
      - Connected Mode When FlexConnect AP can reach Controller, it gets help from controller to complete client
        authentication.
- - - - deployed on Ec2
      - Also available in Google Cloud platform and Hyper-V
  - - - Maximum number of access points
      - Up to 2000
      - Maximum number of clients
      - 32,000
      - Maximum throughput
      - Up to 40 Gbps
  - - - aximum number of access points
      - Up to 6000
      - Maximum number of clients
      - 64,000
      - Maximum throughput
      - Up to 80 Gbps
- - - - he AP with highest controller up-time compared to other Cisco Mobility Express-capable APs
      - The AP configured as VRRP primary, using the VRRP command config ap next-preferred-master on the controller's CLI.
      - The AP with the least load in terms of the number of associated clients associated.
      - Among APs with a similar client load, the AP with the lowest MAC address.
  - - - Cisco Wireless app which can be downloaded from App
      - Store for iOS devices and Play Store for Android Devices. The Cisco Wireless app provides a minimum set
      - of configurable options to deploy Mobility Express in just a few minutes.
      - Procedure
      - Step 1 When the LED on the Access Point chirps green, connect a WiFi enabled laptop to the CiscoAirProvision
      - SSID. The default password is password. The laptop will get an IP address from subnet 192.168.1.0/24.
      - CiscoAirProvision SSID is broadcast at
      - 2.4GHz.