![]() 11r is Fast BSS Transition, which allows a mobile client to re-establish existing security parameters before re-associating to a new AP. The IEEE 802.11 standard (a big book of documentation for manufacturing Wi-Fi equipment) specifies that RSSI can be on a scale of 0 to up to 255 and that each chipset manufacturer can define their own RSSIMax value. What is the maximum range of a Wi-Fi network Based on the table above, an RSSI value of lower than -90 dBm makes the network unusable. ![]() Mist supports configuring different Fast Roaming options. RSSI is a term used to measure the relative quality of a received signal to a client device, but has no absolute value. Roaming is more efficient due to quicker authentication. By looking at the above graph you can see that the RSSI is about -65 dBm and the noise floor is about -90 dBm. Devices authenticate when they connect to the first AP, and carry their credentials with them to subsequent APs. Fast roamingįast Roaming, also known as IEEE 802.11r or Fast BSS Transition (FT), speeds up connections in WPA2 Enterprise Security environments. But if the wireless client is in very close vicinity to the AP it can receive signals stronger than -50 dBm as well, which is still OK. RSSI values between -50 to -70 dBm are examples of ranges in which the clients would see the AP or vice versa. Any signal lower than this will trigger the client to try and roam to a different SSID. Based on the client implementation some clients consider -75 dBm as poor strength as well, and will start roaming to a better Access Point, so values in the range -70 to -80 dBm are client dependent.įor example, on IOS devices, clients maintain a connection until the RSSI hits a value lower than -70 dBm. Any RSSI value lower than -80 dBm is considered poor signal strength. RSSI measures the strength of a radio signal. Use Fast Roaming to speed up security connections when you are using WPA2 Enterprise Security. Use RSSI to ensure that users always experience a strong signal to their Access Point (AP). This value is measured in decibels from 0 (zero) to -120 (minus 120) now when looking at this value the closer to -120 (minus 120) is better because that means. When used together Received Signal Strength Indicator (RSSI) and Fast Roaming options help ensure fast, strong Wi-Fi connections.
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