Airport Extreme only connects to one computer at a time

We just got a new modem and now we can no longer go online with more than one wireless computer at a time, although we have set up a network and it has always worked just fine with the previous modem.
The error message we are getting on a Mac trying to connect while another Mac is online is: (orange light) "Airport is connected to the network...does not have an IP address, cannot connect to the internet".
Another message says that the IP address is already in use by the other computer, so no access.
How do we get more than one Mac to go online at the same time, when there is this IP address problem?

The modem is a Zyxell/Zyzell/Zycell (spelling subject to change!) P600R-D1, our provider is Earthlink (formerly Mindspring). I honestly have no idea if it's a combination router/modem, I don't recall if I was the one who set it up or not as it's been several years.
Also, something I forgot to mention (as this problem has been intermittent for some time) is that occasionally our AirPort Base Station will "overload" for lack of a better word and simply drop all connections to one, several, or all of the computers. During these times the number of bars shown (if the computer was previously connected) drops to one below full, whereas computers who were not corrected cannot see the station at all. AirPort Admin Utility is unable to see them as well, the station simply seems to not exist anymore! Unplugging the power cord always fixes the issue, but this problem usually occurs when I'm intentionally using a lot of bandwidth (downloading large files from torrents, playing intensive multiplayer games on the internet) which is why I mention it here, as it might be important.
I'll try poking around the modem configuration page and see what I can find out about it, and I appreciate your help thus far! Hopefully I can get this resolved and cure this headache!

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AP Extreme only letting on one computer at a time

My wife recently got a MacBook instead of her old HP laptop, and we got the AP Extreme base station so we could share our laser printer. However, I have yet to be able to have both computers on the network at once. If one is online, the other one can't load any sites. I'm assuming it's got something to do with me cocking up the DHCP settings.
Cable modem: RCA DCM425
Macbook 1 is 4 years old, running 10.4.7. (Currently online).
Macbook 2 is 4 weeks old, running 10.6.4. (Currently not online, though that's the one that's got the Airport utility to control the base station; ethernet cable is plugged into the base station).
Also connected to the network is a TiVo - it's recognizing the network but not getting online successfully.
When I set up the base station, if I try to have it get ipv4 info via DHCP, nothing works. If I put in an IP address, subnet mask, and router address manually, I get the current fiasco. I strongly suspect this is the source of my problems, but am in wAAAAy above my paygrade on these things. Any suggestions?
This morning, I unplugged everything and let it sit for a half-hour, then plugged everything back in. This had the salutary effect of making my computer, rather than my wife's, be the one that's got the live connection.
P.S. Less likely cause of problems that I'll mention for full disclosure - I named the new wireless network the same thing as my old network was called. Old Linksys router is currently sitting on the floor, not plugged in (power or network), so I don't think that's it.
Thank you in advance to anyone who takes the time to write back!

When only one computer can gain Internet access is typically a symptom that the router is either not "recognized" by the modem or that it is not properly configured to share the Public IP address provided it by your ISP.
At this point, I would recommend a "factory default" reset on the AEBSn to get it back to its "out-of-the-box" configuration to see if this will get the communications working properly again. If it does, we can go over the set up steps to meet any of your networking requirements. Once reset, the AEBSn will be providing basic Internet routing capability and provide an unsecured wireless network with a name like: Apple Network NNNNNN.

Can the AirPort Extreme support more than one printer at a time?

can the AirPort Extreme support more than one USB printer at a time if it is connected to a USB Hub?

can the AirPort Extreme support more than one USB printer at a time if it is connected to a USB Hub?
Yes.....IF.....you use a powered USB hub.
I have had 3 printers connected at the same time in the past and assume that more would work as long you have a powered hub to support the number of ports that you need.

AirPort Extreme USB Connected Disk Drive Not Visible To Time Machine

My AirPort Extreme USB connected disk drive is visible in the Finder and desktop. It is not visible to Time Machine. When I open Time Machine and bring up the "Choose Backup Disk" the AirPort Extreme USB connected disk drive is not visible.
What am I missing here?

Hi Pete Mackie-
Nope. You aren't missing anything.
Mac OS X 10.5: Time Machine doesn't back up to AirPort Disks
Luck-
-DaddyPaycheck

External HD connected to Airport Extreme only seen by one network computer

I've connected a MyBook external HD ("HD") to an Airport Extreme base station and configured it using Airport Utility ("AU") from my new MacBook Pro ("Pro"). The Pro sees the HD but my other two networked computers do not. I've run AU on one of the other computers to again configure the HD and the result is that again only the Pro can see the HD.
Other networked computers are an Intel iMac (Core Duo) and Intel MacBook (Core Duo).
Mac OS X (10.4.10)

Yes, this is as you indicated earlier and all of these settings are so designated. I have been to the Apple Store and the Genius enabled one of the two computers (I did not bring the other to the store). This was done by (1) repairing disk permissions and (2) installing a clean copy of Airport Disk Utility onto the computer directly from CD. Unfortunately, these two steps did not work on the computer that I did not bring to the store. I'm running DiskWarrior to be certain this is not a permissions problem, but it seems highly unlikely that the permissions are the issue. A possible solution is to install Airport Disk Utility only via disk and not via drag and drop.

New Airport Extreme only connected with N protocol

I just got a brand new Airport Extreme. I disabled wifi on my verizon fios router, plugged in the ethernet, and went through the Airport's setup. I'm connected on all my devices and the range is so much better, but it doesn't seem like my MBP has connected using AC. Below, I have included some information about my computer and the router. Could anyone advise me on how to connect using AC? Do I need to do anything other than the default setup? I noticed in advanced options on the router, that 5ghz is not enabled by default? Also, I'm sitting about 10 feet from the router with no obstructions.
My Computer:
Model Name: MacBook Pro, Late 2013
Processor Name: Intel Core i7
Processor Speed: 2.3 GHz
My Airport Extreme:
Card Type: AirPort Extreme (0x14E4, 0x134)
Firmware Version: Broadcom BCM43xx 1.0 (6.30.223.154.65)
Locale: FCC
Country Code: US
Supported PHY Modes: 802.11 a/b/g/n/ac
My Network:
Network Utility Link Speed: 217 MBit/sec
PHY Mode: 802.11n
Channel: 1
Country Code: US
Network Type: Infrastructure
Security: WPA2 Personal
Signal / Noise: -41 dBm / -92 dBm
Transmit Rate: 156
MCS Index: 21

5ghz wireless is in fact working.. but the Mac is setup to connect to the strongest signal not the fastest.. so you have actually connected to 2.4ghz N wireless..
The way to fix this is simple.. change the wireless name for 5ghz in wireless options of airport utility.. ie.
Make the name short and sweet.. no spaces.. no apostrophe.. just simple.
Mine doesn't show as much because I refuse to buy the AC model..
But you can make sure your country is set correctly.. and all the rest can be left on auto.
Then in the laptop force the connection to AE5ghz or whatever you name it.

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I have a large projection system in our family room where I often show photos so I would like to use Elements 13 for providing the slide show. However, I use my office computer to do my of regular computer work and would like to also have Elements 13 installed on there as I learn how to use it and often organize my photos. Can I install a single purchased copy of the program on both computers?

Thank you

My airport extreme only will connect with computer or ipad not both

my airport extreme only will connect with computer or ipad not both

We need just a bit more information, please before we can begin to accurately troubleshoot this issue.
1) What is the make and model number of your modem?
2) What operating system are you using on the MacBook Pro at this time. Your tagline indicates that you are using OS X (10.4.8), but this is about 6-7 years out of date.
If you are no sure which operating system your Mac is using......click the Apple icon in the upper left corner of the screen, then click About This Mac. Post back with the OS X Version number that you see there.

Can only connect to Internet from one computer at a time on network

I have a 2 computer network in my office networked with an Asante 10/100 hub. The computers are a iMac 24 (Intel) and an old G4 (PCI). The network has worked fine until just recently. Now, I can only connect to the Internet with one computer at a time...(DSL connection). I checked cables, ports, etc, and I'm wondering if this is a 10.4.9 issue. Coincidentally, I noticed that I am not able to access the Internet via Win XP using Parallels which also worked fine up until recently. I checked with the ISP (AT&T) who confirmed that all is OK on their end. Anyone have similar problem? Could OS X 10.4.9 be the culprit? Any help on this will be much appreciated. Thanks.
iMac 24 Mac OS X (10.4.9) 2G RAM; NVIDIA GeForce 7600 GT 256

I'd consider that a 3 computer network, Parallels being a virtual machine would alias the ethernet interface and need its own IP address. That may or may not have anything to do with your problem. Actually, the way you've described things, it sounds like a lot has to do with your contract with ATT. Is there a routing device at your end?
The only way 10.4.9 could be the culprit would be if it were the routing device.
-Phil

Hi..I have an AirPort Extreme base connected to my DSL Modem and has been working fine. But I recently bought another DSL modem along with the latest Airport Express. With this one however I can't get it to connect to the Internet. Any suggestions?

Hi..I have an AirPort Extreme base connected to my DSL Modem and has been working fine. But I recently bought another DSL modem along with the latest Airport Express. With this one however I can't get it to connect to the Internet. The light on the Express is flashing green though. Does it mean I have to re-set the settings on Airport Utility? I.e. the old settings haven't been cleared yet. Any suggestions?

Let's see if I can get this straight.
You have an Airport Extreme base station that is set to "Create a wireless network" and you have the box checked for "allow this network to be extended"....
Then you have an Airport Express that is set to "Extend a wireless network" which you selected the name of your network in the box...
Correct?
See this Apple document:
http://support.apple.com/kb/HT4259?viewlocale=en_US&locale=en_US
The wireless unit on the right of the diagram can be either of the newer Apple base stations.
Extreme, Express, Time Capsule

I have an Airport Extreme which I'm using for a wireless network. Can I also plug in my iMac to one of the free ethernet ports on the Airport Extreme to connect to the Internet that way? Thank you.

I have an Airport Extreme which I'm using for a wireless network. (The wireless router is connected to a DSL modem.) Can I also plug in my iMac to one of the free ethernet ports on the Airport Extreme to connect to the Internet that way? Thank you.

Yes, you can.

Ibook G4 airport extreme wont connect to WPA2 personal need help

ok so I just reformatted my brother I-book G4 and started with a clean slate, 10.3.9 OSX I am trying to connect the airport extreme that is in the computer to the linksys network I have set up. I have a Imac with an intel processor and a powerbook g4 titainium the Imac is using the internal wireless that it came with and the powerbook is using a linksys wireless card through the slot on the side.
I am using WPA2 personal on the network and both of these computers connect just fine through the password. the I book will not allow me to even bring up WPA2 personal as an option. it recognizes the network and I can click it but will not except the password because the only option is WEP of different types. how do I get around this and get it on the network?
I bought a external USB wireless card for it but it wont even recognize that either.
also the computer will not boot up with the airport card taken out of the computer which I found very odd. what is up with that?

Copied from apple's support:
To set up a WPA2 Personal network:
1. Open AirPort Utility, located in the Utilities folder in the Applications folder on a Mac, and in Start > All Programs > AirPort on a computer using Windows.
2. Select your base station, and then choose Manual Setup from the Base Station menu. Enter the base station password if necessary.
3. Click AirPort in the toolbar, and then click Wireless.
4. Choose WPA/WPA2 Personal from the Wireless Security pop-up menu if you want computers compatible with WPA and WPA2 to join your network. Choose WPA2 Personal if you want only computers compatible with WPA2 to join your network.
5. Enter an ASCII password of 8 to 63 ASCII characters.

Time Capsule which will only let me connect to one device at a time. Anyone else experience this?

I have a Time Capsule which I use with a Macbook Pro and an iMac, as well as my iPhone and an Airport Express. It appears as though it will currently only allow me to connect to one device at a time. I had my MBP and iMac sitting side by side and ran Aiport Utility on both. The Time Capsule would only show up on one or the other but not both. Anyone else experience this? It was working great until a day or so ago.

It sounds as if your Time Capsule is in "Bridge Mode", which would only allow one device to connect to the Internet at a time.
To check......
Open Macintosh HD > Applications > Utilities > AirPort Utility
Click Manual Setup
Click the Internet icon
Check the setting for Connection Sharing
If it is "Off (Bridge Mode)", change it to "Share a public IP address"
Click Update to save your changes

My airport extreme has connected to a Tplink router, i set my AE in Create network, so i get a problem of Double NAT. How can i repair this probleme because i have to use TPlink for my IP TV and i want to use AE to creat my network and the guest NW.

my airport extreme has connected to a Tplink router, i set my AE in Create network, so i get a problem of Double NAT. How can i repair this probleme because i have to use TPlink for my IP TV and i want to use AE to creat my network and the guest NW. If we don't have a solution for this question, can i set my AE to use the IP TV and how??? I'm using a 4th Airport extreme

No, not unless it is simply a network connection.
How is your IPTV being provided.. if it is using a separate vlan or separate vpi/vci in the adsl connection. Who is your ISP?
Is the TP-Link ADSL?
Is the IPTV using a separate voice channel on adsl?
Or a different vlan.
Sorry but it is something where a definite answer is not possible unless you provide all the details.
The setups are unique to each ISP around the world..
Here is one for our local ISP.
http://www.avenard.org/iptv/Setup.html
He has a section on getting this working with apple router over wireless.. look
http://www.avenard.org/iptv/IPTV_and_Wireless.html
Google around and see if other people have had success.. the whole setup is tricky.. and it is hard if nobody has used it who actually understands networking.

How do I tell my iPad to only synchronize with one computer?

How do I tell my iPad to only synchronize with one computer? I can change settings before connecting to another computer, or I can slide the sync bar quickly when I connect to another computer. But I'd like to make a setting and not worry.

HI Howard,
Instructions for syncing more than one computer here.
Carolyn

Airport Extreme only connects to one computer at a time

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