modified on 3 March 2009 at 14:16 ••• 4,768 views

Croatian/Bezicno prosirenje postojeceg WLAN-a

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Uvod

Ovaj primjer pokazuje kako konfigurirati wireless repeater. Wireless repeater proširuje područje pokrivenosti postojećeg WLAN-a umjesto da se dodaje još access pointova. Zamislimo ovako složenu mrežu:

Repeater123.jpg

Koristit ćemo dvije wireless antene na repeater riteru. WDS linkovi ce biti uspostavljeni između 'Main getaway' i 'Repeater', 'Repeater' i 'AP1', 'AP2' (krajnji korisnici su povezani na AP1 i AP2).

Napomena, klijentska wireless sučelja (station, ad-hoc, infrastructure) ne podržavaju premošćivanje zbog limitacija 802.11 standarda.


Brzi start

Konfiguriranje glavnog gateway-a (na slici - 'Main Gateway'): 

/ ip address add address=192.168.0.1/24 interface=wlan1
/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5180 ssid=Main_gw wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X2  master-interface=wlan1
/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1

Konfiguriranje repeater-a (na slici - 'Repeater'): 

/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5180 ssid=Main_gw wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X1  master-interface=wlan1
/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1

/ interface wireless set wlan2 disabled=no mode=ap-bridge band=5ghz frequency=5805 ssid=To_clients wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X4  master-interface=wlan2
/ interface bridge port add interface=wlan2 bridge=bridge1
/ interface bridge port add interface=wds2 bridge=bridge1
/ ip address add address=192.168.0.2/24 interface=bridge1

Konfiguriranje AP1 i AP2: 

/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5805 ssid=To_clients wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X3  master-interface=wlan1
/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1
/ ip adress add address=192.168.0.3/24 interface=wlan1

Objašnjenje

Glavni gateway

/ ip address add address=192.168.0.1/24 interface=wlan1

Wireless sučelje ima 'wlan1' i IP adresu 192.178.0.1/24. To će nam biti glavni gateway za ostale nodove u mreži. 

/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5180 ssid=Main_gw wds-mode=static

Ovo pravilo omogućava wireless sučelje i postavlja određene postavke:band, frekvencija (WDS peers moraju biti na istim frekvencijama), SSID, wds-mode (static - WDS sučelje kreirano je ručno u statičnom modu). 

/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X2  master-interface=wlan1

Ovo pravilo kreira WDS sučelje na određenom glavnom sučelju('master-interface'), gdje je 'wds-address' MAC adresa udaljenog WDS peer-a. 

/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1

Najprije napravimo most(bridge) između sučelja na ruteru, zatim dodamo 'wlan1' i 'wds1' sučelja u taj naš most(bridge).

Repeater

Sada ćemo razmotriti konfiguriranje repeatera. Najprije moramo uspostaviti vezu sa glavnim gateway-om('Main Gateway'). 

/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5180 ssid=Main_gw wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X1  master-interface=wlan1
/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1

Ova pravila su veoma slična k onima za 'Main Gateway'. Prvo moramo omogućiti wireless sučelje, zatim moramo postaviti odgovarajuće postavke za wireless i WDS i na kraju dodati ta sučelja u kreirani most(bridge). 

/ interface wireless set wlan2 disabled=no mode=ap-bridge band=5ghz frequency=5805 ssid=To_clients wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X4  master-interface=wlan2
/ interface bridge port add interface=wlan2 bridge=bridge1
/ interface bridge port add interface=wds2 bridge=bridge1
/ ip address add address=192.168.0.2/24 interface=bridge1

Zatim moramo konfigurirati i drugi wireless sučelje. Prvaila su veoma slična prethodnima. Konfiguriranje IP adrese je potrebno za otklanjanje mogućih problema. Repetear će raditi dobro i bez konfigurirane IP adrese.

Konfiguracija AP1, AP2

/ interface wireless set wlan1 disabled=no mode=ap-bridge band=5ghz frequency=5805 ssid=To_clients wds-mode=static
/ interface wireless wds add disabled=no wds-address=XX:XX:XX:XX:XX:X3  master-interface=wlan1
/ interface bridge add
/ interface bridge port add interface=wlan1 bridge=bridge1
/ interface bridge port add interface=wds1 bridge=bridge1
/ ip adress add address=192.168.0.3/24 interface=wlan1

Za kraj još moramo konfigurirati AP1 i AP2 koji su klijentski ruteri. Oni će omogućiti pristup internetu krajnjim korisnicima. Dodajte klijentska sučelja u most(bridge) (Ethernet, Wireless). Klijenti koji se spajaju na AP1 i AP2 će koristiti 192.168.0.0./24 subnet, oni će komunicirati kao da su spojeni na običan switch.

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