Can my AirPort Extreme work via a Cat5 ethernet port within my network?

[etsseattle]

Can my AirPort Extreme work via a Cat5 ethernet port within my network?

I ask because we've had no luck doing this where as our older Airport Express works just fine this way. Thoughts? We upgraded to the Extreme to extend the signal (and have 2 antennas) and trying to avoid hooking it up to the cable modem box which is even further away than where the Airport Express was located.

Thanks for any help. I'm sure this is a basic and simple problem.

 

[swiftaw]

What are you connecting the other end of the Cat5 to?

 

[etsseattle]

The other end is a comcast modem and a huge rack that splits and creates our network. Sorry, lacking the technical words which is why I've turned to the forum.

 

[tman07]

so, youre connecting the modem to the macbook, and you are hoping to conntect the macbook to the router? that's bass akwards. Connect the modem to the router, the connect to the router wirelessly with your macbook(or an ethernet cable) and you should be good to go.