Cisco Aironet

[splat78423]

My Cisco Aironet has a comcast cable modem plugged into its ethernet port.....I reset the config and the computers can see the access point but can not connect to the internet. When I ran ipconfig on the computers, one computer had no ip address at all while another did.

show ip interface brief on the router shows a dhcp ip address on the DVI

I tried setting the default gateway on the computers to that of the DVI but that didnt work.....

"You are connected to the access point but the internet could not be found." is the error I get from the linksys wireless connection application

 

[splat78423]

and by the way, there are no security settings in place, such as keys, etc, so that couldnt be the case..

 

[splat78423]

and when I reset the config and plug in my T1 line router it works fine....it just not workin for my comcast service (which is what I want to use it for....

 

[voltron1011]

Was the Comcast modem plugged into another device before (IE: Linksys-router or another PC)? I know a lot of Cable companies have mac-reservation on the modems. Sometimes, it requires that you reload the modem, and other times it requires you to actually call them up and tell them that you have a new device plugging in.

 

[splat78423]

No it has never been plugged into another device, the service was just brought in from the poll yesturday afternoon. I didnt get around to hooking it up to my aironet 1200 until today. My aironet doesnt auto detect default gateway or DNS addresses like it does when I plug it into my T1 router.....

I thought that maybe I can use static addressing but that wont work either. I have never used a wireless cisco router befor but I am very comfortable with the CLI. Is there a cable internet mode that can be turned on in the router that will point the system into the right direction?

I tried jumpin into the gui interface but it wont load using the default ip....I have already reset the router config several times....The default config only works for my T1, not my cable internet.

 

[voltron1011]

Make sure that the interface is set up for DHCP when you plug it in. It sounds to me like you are running it in bridge-mode right now, so that's why it only works when you plug it into the router with the t-1 interface. You have to remember that a cable-modem is a layer-1/2 device. You cannot plug in another layer-2 device into and expect to get communications.

 

[splat78423]

I see that multple modes are available but how do I configure between one and another in the CLI, that is my question? I am pretty sure that a cable mode exists, I just dont know how to switch the router into that mode. In other words, I am looking for someone out here who knows the exact CLI commands to do this because I can not seem to figure them out except for possibly through the GUI which I apparently can not seem to access even when I plug the ip address of the device into my browsers url field (and I have verified hat I am using the correct ip by checking the IOS output)....

 

[Supergrrover]

The aironet is just an access point. It won't function as a router. You will need another device to do the routing and DHCP addressing that the aironet will connect to. Think of it as a hub.


Brent
Systems Engineer / Consultant
CCNP, CCSP

 

[splat78423]

Oh ok,I see now, that does make alot of sense. I'll pick a cheap linksys router up and then take it from there.....Now that I think of it I may have one back in storage somewhere......