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What am I doing wrong? (wireless questions)

I have a cable modem. It comes in through the wall, is provided by UPC and handles phone, TV and internet connectivity. It works.

I plug a phone in, it works. I plug a laptop in it works. I haven't tried plugging a TV in yet, but I'm optimistic.

Then I plug a wireless access point in. My laptop finds the access point, and I can reach it at it's default IP address of 10.0.0.1 and even change it's config options. Indeed I can change it's config options from the third floor, which suggests that once the thing works connectivity will be rather good. (Note to self, changing it's IP address results in having to reset it to factory defaults, stop doing this)

The one thing I can't do is access the internet through my wireless access point, which as far as I recall should just be mimicing an ethernet cable, at least until I turn on the security. Any suggestions as to what I'm doing wrong? It's a cisco aeronet wireless access point that I was given about 4 years ago by Cisco. My laptop has no trouble connecting direct to the modem, and is dynamically determining it's network settings.

Suggestions?

Comments

Most Access points/routers have a built in DHCP server, so do most cable modems. If both are switched on at the same time it will create the problem you describe.

The solution is to turn off the DHCP server in the Access point, BUT you first need to give it a fixed IP address outside the range of address handed out by the DHCP server in the modem otherwise you will be unable to easily communicate with the access point.

So in steps

1. Determine the Range of IP address handed out by the Modem, to do this you will need to log in to it, hopefully you have instructions on how to do this, everything I can find on the web is Double Dutch to me (GROAN). If you have no instructions, try plugging the laptop in to the modem direct and running an IPCONFIG from the CMD prompt and then try logging to the default gateway IP address.

2. Log in to access point and Fix its IP address to something just outside the range found above i.e. my range runs from 192.168.1.1 through to 192.168.1.98, so my Access point is fixed at 192.168.1.99.

3. Turn off the DHCP server in the Access point.

4. Power everything off

5. If your Access point has a built in Ethernet hub, make sure you connect the Ethernet lead to one of the standard router ports NOT the WAN port.

6. Power up the Modem, wait until it is all up and running.

7. Power up the Access Point.

8. Power up the laptop.

9. Keep fingers crossed....

I can’t remember your tech knowledge in this area but I imagine this all makes sense, apologies if I am teaching you suck eggs or if I have lost you. If the later is the case please feel free to ask for more detailed instructions.
Cheers Andy, these are exactly the kind of instructions I can follow. Just need to crack that identifying the range of IP addresses thing and I'll give it all a go.
Suggestions?

Stop putting apostrophes into instances of possessive "its".

Off-thread topic: In case you didn't get it

I sent you a 'Happy Anniversary' text yesterday.
hope you both had a good one.

Off thread

Hmm, since I'm now typing this wirelessly it seems the problem was as follows.

The modem really was just that, a modem, with no routing capabilities. Likewise the access point really was an access point also with no routing capabilities.

Once this had been confirmed by my brother in law - who knows more of these things than I - we popped out and spent 30 euros on a router with built in wireless access point - and it works!

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