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====== Virtual AP ====== Even on one single physical wireless chip, it is possible to broadcast multiple wireless SSID's. In that case we are talking about //'__V__irtual __A__ccess-__P__oints'// or //'VAP's'//. A VAP is basically a logical //'wifi-interface'// which points to an existing //'wifi-device'// (physical interface). Therefore it can be treated as any other interface as well. It can apply own encryption-settings, filter- and firewall-rules, can be put into a bridge and so on. These instructions show how to add a new virtual wireless interface to the routers configuration. ===== Overview ===== ==== Level of difficulty === Medium ==== Related topics ==== * [[documentation:configuration:uci|UCI]] * [[documentation:configuration:config_files:config_wireless|/etc/config/wireless]] ===== Instructions ===== ==== GUI ==== In this tutorial we will create a virtual access point. At first you must log in to your router. Go to the __Network Settings__ tab and then to __Wireless__. {{ :howto:general:wireless:dd-wrt_nxt_-_chromium_003.png?nolink&800 |}} In the under right corner you noticed a button which creates a new access point. After creating the access point a name is required to apply the changes. Make sure to encrypt your AP! ==== UCI Config System ==== * **Define virtual wireless interface** __Note:__ the device 'wl0' must be replaced by the device listed in your 'wifi-device' section! ((details see 'UCI config files' section)) <code> uci add wireless wifi-iface uci set wireless.@wifi-iface[-1].device=wl0 uci set wireless.@wifi-iface[-1].mode=ap uci set wireless.@wifi-iface[-1].network=guest uci set wireless.@wifi-iface[-1].ssid=guest-wlan uci set wireless.@wifi-iface[-1].encryption=mixed-psk uci set wireless.@wifi-iface[-1].key=guest-access </code> * **Store changes** <code> uci commit wireless </code> * **Apply changes** <code> wifi </code> ==== UCI config files (native) ==== Configuration file: [[documentation:configuration:config_files:config_wireless|/etc/config/config_wireless]] As stated before, a vap consists of a new 'wifi-interface' section in the wireless configuration file, which points to an existing //'wifi-device'//. So the first step is to look for the wireless-device which should broadcast the new SSID. In our example, the device we are looking for is '**wl0**': <code> config wifi-device 'wl0' option device 'wl0' option type 'brcm' option country 'CH' option hwmode '11g' option htmode 'HT20' option channel '0' option disabled '0' </code> * **Add wireless-interface** Now we can add the new wireless-interface with the //'device'//-option set to our physical device. <code> config wifi-iface option device 'wl0' option mode 'ap' option network 'guest' option ssid 'guest-wlan' option encryption 'mixed-psk' option key 'guest-access' </code> * **Apply changes** To get the new setup working, the config needs to be reloaded: <code> wifi </code> As mentioned, the VAP results in an independent interface to the routers operating system. Generally the new interface name is the physical device, followed by a continuos number (wl0, wl0-1, wl0-2, ...) ((the section order in /etc/config/wireless is significant)). <code> wl0-1 Link encap:Ethernet HWaddr CE:E1:D5:9F:12:DF UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:3 overruns:0 frame:144036 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) </code> ===== Troubleshooting ===== Not available, yet
