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--- network_stuff:wifi [2023/05/17 20:08] – jotasandoku
+++ network_stuff:wifi [2025/03/15 11:01] (current) – jotasandoku
@@ Line 1: / Line 1: @@
-  * BSSID ( Basic Service Set Identifier ): MAC physical address of the AP or wireless router that is used to connect to the WiFi
+ {{ :network_stuff:wifi_channels.xlsx |}}
+{{ :network_stuff:wlc_cli_commands.xlsx |}}
+ * BSSID ( Basic Service Set Identifier ): MAC physical address of the AP or wireless router that is used to connect to the WiFi
   * STA (Station): Is the end station. The wifi client.
@@ Line 15: / Line 20: @@
     - DFS 'events' are radar interference events (from weather radar frequencies)
   - Check the following tools while the event happens or starting likely sources of interference like microwave ovens:
-    - [[https://documentation.meraki.com/MR/Monitoring_and_Reporting/Using_the_Channel_Utilization_Live_Tool|Channel_Utilization_Live_Tool]]  - 4g: usually 4,6,11,14 (22MHz width)  [[http://example.com|4g-chann]]  -- 5G: ch 36-64
+[[https://documentation.meraki.com/MR/Monitoring_and_Reporting/Using_the_Channel_Utilization_Live_Tool|Channel_Utilization_Live_Tool]]  - 4g: usually 4,6,11,14 (22MHz width)  [[http://example.com|4g-chann]]  -- 5G: ch 36-64
     - [[https://documentation.meraki.com/MR/Monitoring_and_Reporting/RF_Spectrum_Page_Overview|RF_Spectrum_Page_Overview]]
@@ Line 28: / Line 34: @@
   * MCS: Modulation and Coding Scheme. The higher the better but sometimes a lower one is good as allows for fading . See this [[https://www.digitalairwireless.com/articles/blog/demystifying-modulation-and-coding-scheme-mcs-index-values|External Link]]
     * 2G is MCS
-    * 5G ia VHT-MCSD
+    * 5G ia VHT-MCS
-    *
 GI: Guard Interval . intended to avoid signal loss from multipath effect. Short GI (~400ns)
@@ Line 50: / Line 56: @@
     * 802.11ax:  orthogonal frequency-division multiple access (OFDMA) - which is equivalent to cellular technology applied into Wi-Fi
       * Down+uplink MU-MIMO
+^ MCS Type       ^ 802.11 Mode     ^ Description                                                                 ^
+| **Legacy**     | 802.11a/b/g     | No MCS index. Uses fixed data rates (e.g., 6, 9, 12, 18, 24, 36, 48, 54 Mbps).   |
+| **HT-MCS**     | 802.11n (HT)    | High Throughput (HT). Supports MCS 0 to 31 (depending on spatial streams).       |
+| **VHT-MCS**    | 802.11ac (VHT)  | Very High Throughput (VHT). Supports MCS 0 to 9 (per spatial stream).            |
+| **HE-MCS**     | 802.11ax (HE)   | High Efficiency (HE). Supports MCS 0 to 11 (per spatial stream).                |
+^ Parameter            ^ Description                                                                                     ^
+| **MCS Type**         | HT-MCS (802.11n), VHT-MCS (802.11ac), HE-MCS (802.11ax).                                 |
+| **Channel Width**    | 20 MHz, 40 MHz, 80 MHz, 160 MHz.                                                       |
+| **Spatial Streams**  | Number of spatial streams (NSS): 1 to 8 (depending on the standard).                     |
+| **Guard Interval**   | Short GI (400 ns) or Long GI (800 ns).                                                  |
 __dB and dBm__\\
@@ Line 120: / Line 139: @@
 **__MAIN CISCO WIFI LINE__**
-  * AireOS (8540/5520/3504/vWLC) - OOL
+AIREOS
-  * Aironet
-    * 9800 WLC
+  * 5520/3504/WLC - OOL
     * Clean Air technology (RRM driven events)
+    * APs are configured with ''groups''. Difficult granularity
+  * Aironet
+IOS-XE WLC
+    * C9800 WLC
+      * Much better customization by means of: profiles and tags to configure: a) site; b) RF ; c) policy profiles
+{{:network_stuff:wlc-ios-xe.png?400|}}
 ----
@@ Line 219: / Line 245: @@
   - [[https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/Conducting_Site_Surveys_with_MR_Access_Points]]
+== Authentication ==
+  * WPA2-Personal (PSK): Can be WPA-AES (secure) or others
+  * WPA2-Enterprise (ENT): Can be WPA-AES (secure) or others
+  * WPA-3-Personal: wpa-3 SAE Simultaneous Authentication of Equals
+  * WPA-3-enterprise wpa-3 SAE Simultaneous Authentication of Equals
+ uses a Remote Authentication Dial-In User Service (RADIUS) server to authenticate devices, while WPA Personal uses a single password for all devices.

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