Mesh Scanning

Instant APs configured as mesh point APs continuously scan the RF Radio Frequency. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals. environment for neighboring APs to either establish an uplink connection or identify better routes to the mesh portal. A mesh point AP performs two types of scans:

• Uplink Scanning — A mesh point AP without an uplink connection scans the RF Radio Frequency. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals. environment to identify neighboring mesh APs or the mesh portal to establish an uplink connection. In this scan mode, the AP scans all available channels one after the another to find a link to the mesh portal. If the scan on a particular channel fails or is unsuccessful, the AP retries scan on the same channel again before moving to a different channel. The number of retries an AP attempts on a channel is defined using the max-retries parameter in the mesh profile.
• Topology Optimization Scanning — Mesh point APs that are part of a mesh cluster perform topology optimization scans to identify better routes to the mesh portal. Topology optimization scanning can be configured to occur at a certain interval, or when the RSSI Received Signal Strength Indicator. RSSI is a mechanism by which RF energy is measured by the circuitry on a wireless NIC (0-255). The RSSI is not standard across vendors. Each vendor determines its own RSSI scale/values. score with the neighboring mesh AP falls below the defined threshold. The settings for optimization scanning is defined using the link-threshold, optimize-scan-interval, and reselection-mode parameters in the mesh profile.

Configuring Topology Optimization Scanning

Topology optimization scanning is configured using the wlan Wireless Local Area Network. WLAN is a 802.11 standards-based LAN that the users access through a wireless connection. mesh-profile command. It is a per-AP setting that must be configured on individual mesh point APs. There are two parameters in the wlan Wireless Local Area Network. WLAN is a 802.11 standards-based LAN that the users access through a wireless connection. mesh-profile command that initiate the scan:

• optimize-scan-interval — The optimization scan interval parameter defines the interval at which the mesh point AP must perform a scan for neighboring APs. The range is 1-100 and the value is defined in hours. The default value is 24.

  The optimize-scan-interval only takes effect when the reselection-mode parameter is set to anytime.

  The following CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. command configures the interval for topology optimization scanning:

  (Instant AP)(config)# wlan mesh-profile

  (Instant AP)(Mesh Profile)# optimize-scan-interval 36

• reselection-mode — This parameter allows you to initiate a topology optimization scan. The available options are:
  • never — prevents topology optimization scanning by the mesh point AP.
  • subthreshold — initiates topology optimization scanning when the current uplink strength falls below the link-threshold value defined.
  • startup-subthreshold — initiates topology optimization scanning when the total uplink time of the mesh AP is less than 9 minutes. This is the default setting.
  • anytime — initiates topology optimization scanning according to the interval defined in the optimize-scan-interval parameter.

  The following CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. command configures the trigger for topology optimization scanning:

  (Instant AP)(config)# wlan mesh-profile

  (Instant AP)(Mesh Profile)# reselection-mode <never | subthreshold | startup-subthreshold | anytime>