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--- networking:wifi_roaming [2013/05/18 13:47]
gcooper
+++ networking:wifi_roaming [2013/05/18 14:27] (current)
gcooper
@@ Line 1: / Line 1: @@
-====== Wireless (Wifi) Network Roaming ======
+====== Wireless (Wifi) Networking ======
+===== Roaming =====
 http://superuser.com/questions/122441/how-can-i-get-the-same-ssid-for-multiple-access-points
@@ Line 5: / Line 7: @@
 http://support.apple.com/kb/HT4260
-  * Try to use cabled Ethernet to connect the primary wireless access point (WAP) to the secondary WAP units
+In this image, #1 is the primary WAP and the #2's are secondaries:
-  * If you can't use cabled Ethernet, use a separate wireless network for the uplink from the secondaries to the primary
-  * If you use a separate wireless uplink, use a different technology
+{{ :networking:wireless_hw_overview.png |Wireless Hardware Overview}}
+  - Try to use cabled Ethernet to connect the primary wireless access point (WAP) to the secondary WAP units
+  - If you can't use cabled Ethernet, use a separate wireless network for the uplink from the secondaries to the primary
+  - If you use a separate wireless uplink, use a different technology
     * 802.11b/g/n for clients
     * 802.11a for uplink
-  * Enable NAT on the primary WAP/router that connects to the Internet
+  - Enable NAT on the primary WAP/router that connects to the Internet
     * Optionally enable the DHCP Server function as well
       * Only one DHCP server per subnet
-  * Don't use routing or NAT on the secondary WAP units
+  - Don't use routing or NAT on the secondary WAP units
     * Leave the WAN port empty
     * Or use the WAN port and configure it as bridged mode
-  * Use the exact same settings on all wireless access points
+  - Use the exact same settings on all wireless access points
     * SSID
     * Security (WPA2-PSK)
     * Password/Pre-Shared Key
-  * Set each WAP to a different channel
+  - Set each WAP to a different channel
     * Use non-overlapping and (hopefully) unoccupied channels
-In this image, #1 is the primary WAP and the #2's are secondaries:
+===== Performance =====
-{{ :networking:wireless_hw_overview.png |Wireless Hardware Overview}}
+  - Use the latest APs that support simultaneous dual-band 802.11n technology
+    * Supports older 2.4GHz clients
+    * And supports newer 5GHz 802.11n clients
+  - For older 2.4GHz 802.11n radios, you might configure it for 20MHz (HT20) channels
+    * This limits your 802.11n transmission rates in 2.4GHz to ~130mbps instead of 300mbps
+    * But leaves some of the band free for things like Bluetooth
+  - For newer 5GHz 802.11n radios, you might configure it for wider 40MHz (HT40) channels
+    * For maximum throughput
+  - If you don't need to support any older 2.4GHz-only devices, use the 5GHz band
+    * It is generally less busy
+    * And you can use HT40 without starving Bluetooth and other uses
+  - When working with 2.4GHz radios:
+    * If you don't have a lot of interference, **try using channels 1, 6 and 11**
+      * They don't overlap at all
+      * Choose channels in increments of three to the next closest access point or interference

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