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[UPDATES] As I use this a lot, I have learned a few things.

One, do not configure DHCP/Basic Settings first. Configure one NIC as a repeater and save and then go to Basic Settings, you will notice DHCP is gone and WAN is set to Disabled (if not apply settings before configuring further). It takes care of this for you and correctly configures it. This is better/preferred then manually configuring the basic settings page yourself. This is a GUI glitch IMO, but I love the GUI.

Another, If you reset router, (or do what I do, which is configure the two routers close to each other), and then say unplug it and move it to the location it will be running. I found it would fail, to fix this, go to wireless security and manually type in the security passwords and hit save/apply.

Or/ Turn off WiFi Encryption on Primary AP/Repeater config to confirm that that is not the issue. I found that after a reboot the WiFi Repeater Bridge Wireless Encryption needed to be re-implemented.

If your WiFi AP is not the Gateway/DHCP router, you may set DHCP server to disabled on the Primary AP.

Gateway router = Router plugged into cable modem

Primary AP = Broadcast's the WiFi you want to extend

Repeater NIC = The DD-WRT Second Router that will bridge the WiFi from Primary AP

[END UPDATES]

#. (Optional) Get MAC Address for any Static IPs to be configured.

#. Gather or Set PRIMARY AP information (Use WPA2 AES, not Mixed and all settings should be configured, not AUTO, like Channel etc etc)

Note you only need to use ONE channel as the AP for the Repeater, If you have it, I reccomend using the 5 Ghz in N only mode. (5 Ghz is less "busy" and N has the best distance, AC actually sucks for distance and pushing through walls etc)

2.4 Ghz SSID - CHANNEL - Channel Width - ENCRYPTION METHOD - PASSWORD

or

5 Ghz SSID - CHANNEL - Channel Width - ENCRYPTION METHOD - PASSWORD

#. Make Offline Copy of guide and disconnect router from internet.

#. Hard wire in VIA 1 of LAN ports, NOT WAN.

#. Reset to Factory Defaults via Administration >> Factory Defaults >> Yes >> Apply Settings

#. Set your Computer to Static IP (Use .CMDs for easy switching)

#. Browse to DD-WRT WebUI @ 192.168.1.1

#. Go to Wireless >> Basic Settings.

NOTE:
I will only configure the Repeater Bridge NIC in this Guide, as you can do whatever you please with the other NIC/AP. Just note the Big difference between my guide and the Official Guide is that they have you create a Virtual NIC inside the same NIC. (I also leave DNSMasq ON, this stops me from having to go to PRIMARY AP and back when accessing devices connected to my Wireless Repeater like my server) I am going to assume your router has 2 NIC's and that their Guide is outdated *A lot of DD-WRT stuff is*. Because they talk about "halving" your bandwidth, but this is due to the Virtual NIC taking half as the AP. What you WANT to do is have the one NIC (In this guide the 5 Ghz) be the Repeater Bridge and the other NIC be the AP. This way you get full bandwidth potential. (I have never gotten above 7/8 MBps but this is over 100-200 FT across an outdoor yard setup. You may get better or worse, but for web-surfing and small file transfers, it worked great.) -- And its free, well just the one ISP!

Anyway configure the Repeater Bridge to match the AP settings. (Note change dd-wrt SSID to your settings!)

 

SAVE -- Don't Apply YET!

#. Go to Wireless >> Wireless Security and configure to match AP EXACTLY. (It may be beneficial to skip this step and have the router's have open SSID's, connect to each other, then configure encryption simultaneously on both routers after you have working repeater over open SSID's)

 

SAVE -- Don't Apply YET!

#. Go to Setup >> Basic Setup

This assumes your GATEWAY router is 192.168.1.1 -- if not, change to your needs.

Disable DHCP server. 

SAVE -- Don't Apply YET! *IF This takes effect right away,  browse to 192.168.1.2)

#. Go to Setup >> Advanced Routing >> Set Operating Mode to "Router"

 

SAVE -- Don't Apply YET!

#. Go to Security >> Firewall >> Uncheck all Except "Filter Multicast" then tick Disable SPI Firewall (You have a firewall on 192.168.1.1 right?)

APPLY SETTINGS!!!

While I did't cover configuring the AP NIC, you should configure it before Applying Settings. You may configure it however you like, it will use Repeater Bridge as long as that is configured correctly)

#. Go to Administration and scroll to bottom and click "Reboot Router"

This can take a while, your Wi-Fi signal will show up before the Repeater negotiates the bridge between NIC's and what ever else it does, give it at least 10 Minutes!

If you use this set-up I HIGHLY recommend getting a second DD-WRT router, preferably the same one, for the Primary AP and then use this to Increase Wireless Signal on both ends. It works wonders @ TX 100!

 

 

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