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Cannot ping Buffalo router in bridge mode

Posted on 2007-03-31
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Last Modified: 2012-06-27
I'm trying to set up a Buffalo AirStation WHR-G54S in bridge mode.  The manual says that, when switched to bridge mode, the IP defaults to 192.168.11.100, however this address does not work and cannot be pinged.  What else could I try, please?

Thanks.  
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Question by:Mike London
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12 Comments
 
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Expert Comment

by:Rob Williams
ID: 18830143
That is the default IP, but it also disables DHCP on the router so you have to manually assign your computer a static IP in the same subnet. If not familiar with this, set your computer network adapter (wireless adapter I assume) manually to have an IP of 192.168.11.101 with a subnet mask of 255.255.255.0 and a gateway address of 192.168.11.100.

Give that a try?
Assuming it works you will also have to manually assign your appropriate DNS server to the network adapter as well.
Also make sure you are plugged into one of the LAN ports and not the WAN.
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Author Comment

by:Mike London
ID: 18831633
That worked great, thanks Rob.  However, I am trying to set up the AP so that I can use it to connect my Slingbox to my wireless network. I want to connect it by cable to the Slingbox.  But I cannot configure it to connect to the existing wireless network.  I've been trying all morning without success.  Could you give me some guidance, please?  Thanks again, Micky
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Expert Comment

by:Rob Williams
ID: 18832041
"Slingbox"....the total extent of my knowledge about these units is they are for streaming video and hook to your TV. My audio-visual product knowledge used to be very high, but that was when we still used 16mm projectors back in 19xx. <G>

However I can likely help with the configuration of the two routers.
I assume you have an existing wired router and want to add a wireless access point, the Buffalo, and have all devices able to connect to the Internet and share resources. ? If so:
-the fact that the Buffalo uses 192.168.11.100 now determines the entire network addressing. Everything will have to be changed to conform to that, using 192.168.x (x= 1-254) and subnet mask of 255.255.255.0.
-the LAN IP of your wired router will have to be changed to something in that subnet such as 192.168.11.254
-again on the wired router set the DHCP range to something like 192.168.11.50 to 192.168.11.99 (make sure it doesn’t conflict with anything set with a static IP such as the routers
-connect a cable from one of the LAN ports of the wired router to one of the LAN (not WAN) ports of the wireless. If the lights do not light up indicating a connection you may need a cross-over cable (usually only necessary on older units)
-all devices obtaining an address automatically through DHCP should be rebooted, or if you are familiar with command lines rub ipconfig /release and the ipconfig /renew
-wireless clients can now get a DHCP address from the wired router, rather than the wireless
-now all devices should have Internet access and be able to easily connect to one another to share resources.
-I don’t know hoe the Slingbox obtains an IP. If DHCP you should be all set, if static you will have to assign it a 192.168.11.x IP
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Author Comment

by:Mike London
ID: 18834898
Hi Rob,

Thanks so much for all your most generous help again.  I carried out the steps in your solution although I did not manage to get the new AP to ping the old AP or the router.  I could see at least that the new AP was trying to transmit, which was progress.  So I'm going to have a word with my IT guy today and see if I can get him to come and fix it.

Many thanks again.

Micky
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Expert Comment

by:Rob Williams
ID: 18835975
Very welcome. Let us know how it goes.

For the record, I don't know your particular unit, but the manual implies this bridge mode makes it an access point, but most combined router/modem units cannot be used as access points. Bridged mode actually turns the unit into a basic modem
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Author Comment

by:Mike London
ID: 18836015
Hi Rob,

The manual seems to imply that it should work in bridge mode - but maybe it would be easier to configure a USR AP to work with the existing USR AP?  There are various settings on the Buffalo unit that refer to running in bridge mode but I'm not sure if they are general or if they apply solely if I am bridging to another Buffalo AP?  Is it easier to get 2 AP's from the same manufacturer to interoperate, do you think?

Thanks again.

Micky
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LVL 77

Expert Comment

by:Rob Williams
ID: 18836090
Not suggesting it won't work, but it's just a feature of these units I haven't come across. Bridging on a combined modem/router usually means something a little different than a wireless bridge.
2 units from the same manufacturer is definitely easier in that you can copy the config except the IP's, but not necessary. Some units do use authentication methods that have to match.
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Author Comment

by:Mike London
ID: 18836372
OK.  Thanks.  I'm thinking of getting another USR AP as this must be easier to configure.
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Author Comment

by:Mike London
ID: 18842199
I thought that I would have another bash at configuring the Buffalo AP.  However, this morning, I got it to respond once using its fixed IP address, thereafter the browser interface would not fire up.  It was plugged directly into my laptop.  Grrrr!  Another thing - I'm not sure how I set up MAC filtering on my Sony laptop with integrated WLAN.

The tech support guy at USR, who was unusually helpful, told me that a wireless bridge will only work with the WLAN using WEP (I normally use WPA) but that, if I use WEP and MAC fiiltering at both ends of the bridge, it would be totally secure.  Is this OK and what about the laptop accessing the WLAN?  Does this affect the security?  I'm a bit paranoid about security.  Also, with regard to the (original) AP that is connected to the router, do I leave this running in AP mode or do I set it up too in bridge (or another) mode? I still need to be able to connect from my laptop.  

Thanks again.

Micky
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Accepted Solution

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Rob Williams earned 500 total points
ID: 18842594
To be honest I am not much help with the actual bridge configuration. I have only done one or two. In a previous life I did network cable troubleshooting and performance checking. That combined with my lack of faith in wireless security, have kept me far more in the wired router world, trusting it as having better security and performance. <G>

However....
>>"I'm not sure how I set up MAC filtering on my Sony laptop "
On the Sony ?
MAC filtering is set up on the wireless router. Once enabled no computer can connect (in theory) until the MAC address (that of your Sony) is added to the wireless unit approved list. Easy to configure.

I have seen units where WEP is the only option for bridge connections. That is very possible, especially if the unit is more than a year or two old.
I would recommend when configuring wireless connections, keep security to a bare minimum until working then add additional encryption, MAC filtering , and turn off SSID broadcast if an option.
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Author Comment

by:Mike London
ID: 18843774
Thanks so much, Rob.

Micky
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LVL 77

Expert Comment

by:Rob Williams
ID: 18843954
Very welcome Micky, thank you.

If you post any further questions, and need help with this just send a link to the question, to the e-mail in my profile (click on RobWill)
Cheers !
--Rob
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