Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I've been following the page on the DD-WRT web page for linking routers as WAP's (wireless access points, both connected through a wired connection) [1], and I'm finding the following issues:

  • I can't communicate with my second router reliably
    • Web admin/pinging doesn't always respond (timeouts)
    • The two routers flash activity like crazy after being plugged into each other (storming?)
    • WiFi clients have strong signal but terrible speeds (exhibits as starting/stopping downloads/etc)

Here's my setup:

  • At present setting up 2 ASUS RT-N13UB1 DD-WRT flashed routers
  • Gateway ASUS is 10.0.0.1, set up as AP as well as Gateway

    • Common settings:
      • WAN is active, set up as DHCP to my provider
      • DHCP server is enabled, clients served at 10.0.0.100-150
      • DNSMasq is used for DHCP/DNS
      • Set up in "Gateway" mode under Advanced Routing, no static routes
    • WiFi settings

      • Wireless Mode; AP
      • Wireless Network Mode: Mixed
      • Wireless SSID: Same as Secondary ASUS
      • Wireless Channel: 11
      • Wireless SSID Broadcast: Enable
      • Network Configuration: Bridged
      • Wireless Security Mode: WPA2 Personal, AES and same key
    • Secondary ASUS is 10.0.0.2, set up as AP, in router mode.

      • WAN & STP are disabled
      • Gateway is set to 10.0.0.1, as is local DNS
      • Assign WAN port to switch is checked
      • Advanced routing is set to "Router"
      • Dynamic Routing is set to "Disable", no static routes.
    • WiFi settings:
      • Wireless Mode: AP
      • Wireless Network Mode: Mixed
      • Wireless SSID: Same as primary ASUS
      • Wireless Channel: 6
      • Wireless SSID Broadcast: Enable
      • Network Configuration: Bridged
      • Wireless Security Mode: WPA2 Personal, AES and same key
    • Services:
      • DNSMasq is disabled, traff is disabled

Any help would be appreciated. I'd love to extend WiFi coverage throughout our house.

[1] http://www.dd-wrt.com/wiki/index.php/Wireless_Access_Point#Long_Version

share|improve this question

1 Answer 1

up vote 1 down vote accepted

I may have solved this. Here's the step-by-step in case anyone else has the same issue.

I enabled ssh and logging in dd-wrt, and remoted into the primary router (10.0.0.1). Running tail -f /var/log/messages while trying to ping/access 10.0.0.2, I got a slow flood of messages looking like this:

Jan 30 07:47:38 pipes user.warn kernel: vlan1: received packet with  own address as source address

That looked suspicious - I looked at my LAN client tables and saw that no-one had the same IP address, but in closer detail, I saw that my router at 10.0.0.2 had the same MAC Address as my 10.0.0.1 device!

I fixed this by logging into my 10.0.0.2 device and enabled "MAC Address Cloning". I chose a non-existent (made-up) MAC Address, and now I can ping/remote into it, and the routers aren't blinking like some 90's rave.

Hopefully that saves someone else. I still have to verify that WiFi works, but I think this is on the right track.

share|improve this answer
1  
If you ever find two networking devices that were both factory-programmed with the same MAC address, then you found a massive screwup on the part of that company. –  Spiff Jan 30 at 18:41
    
Needless to say I won't be buying another ASUS router for a while. :) –  Eddie Parker Feb 12 at 4:28

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.