====== Multiple Repeaters with same SSID ======

[[https://www.gargoyle-router.com/phpbb/viewtopic.php?f=5&t=9267&hilit=Bssid]]

===== Introduction =====

In a situation were the AP and more than one bridge/repeaters have the same SSID we need to force the bridge/repeater to lock on to the AP. To do this we use the MAC address of the WLAN AP. 

When selecting the SSID to join we need to manually edit /etc/config/wireless to ensuring it uses the correct AP.

first you'll need to know the BSSID of the one you want to connect to.
if you're on 2.4ghz, at the command line type
"iw wlan0 scan"


===== Prerequisite =====

The bridge/repeater routers needs to be configured correctly.

The bridge/repeater IP address is found on the main Access point.









===== Command line =====

SSH into your client router with putty

<shell>
iw wlan0 scan
</shell>

Find the MAC address. In this case "BSS aa:aa:aa:aa:aa:aa"

<shell>
BSS aa:aa:aa:aa:aa:aa(on wlan0) -- associated
        TSF: 164972434397 usec (1d, 21:49:32)
        freq: 2462
        beacon interval: 100 TUs
        capability: ESS (0x0421)
        signal: -32.00 dBm
        last seen: 0 ms ago
        Information elements from Probe Response frame:
        SSID: Gargoyle
        HT capabilities:
                Capabilities: 0x11ed
                        RX LDPC
                        HT20
                        SM Power Save disabled
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 3839 bytes
                        DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 8 usec (0x06)
                HT TX/RX MCS rate indexes supported: 0-23
        HT operation:
                 * primary channel: 11
                 * secondary channel offset: no secondary
                 * STA channel width: 20 MHz
</shell>

In this case we install nano to edit "/etc/config/wireless". We could use other methods like vi or WinSCP.

<shell>
opkg update
opkg install nano
nano /etc/config/wireless
</shell>

Add the line "option bssid 'aa:aa:aa:aa:aa:aa'"

<shell>
config wifi-device 'radio0'
        option type 'mac80211'
        option channel '11'
        option hwmode '11g'
        option path 'platform/qca955x_wmac'
        option htmode 'HT20'

config wifi-iface 'cfg2'
        option device 'radio0'
        option network 'wwan'
        option mode 'sta'
        option client_bridge '1'
        option ssid 'Gargoyle'
        option bssid 'aa:aa:aa:aa:aa:aa'
        option encryption 'none'

config wifi-iface 'cfg3'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'Gargoyle'
        option encryption 'none'
</shell>