Setting up DHCP on home network

I have a home network that has Mac Server running on a Mac mini. I have two Apple Extreme routers. In Server app in the Settings tab of the DHCP section I carelessly deleted all Networks and in the Clients tab I deleted all clients. Now I’m trying to correctly set up DHCP but have been unsuccessful.
If I try to add an entry in the Networks section I get the error message “Another DHCP server might be running”. In the Clients section I see two identical entries.
I’ve tried to understand the tutorials and other help sources but all of them devolve (for me) into technical gobbledygook that is way beyond my current understanding.
Can anyone provide a recipe for setting up DHCP for my network configuration?

Thanks, Linc. It turns out I did do just that after I concluded that the DNS service on Server is unnecessary when there's a router between the home network and the internet. The error message is probably referring to the router when it mentions "another DHCP server". I've just disabled the DNS service in Server and removed everything in the two tabs for DNS service.
I really don't know what's wrong about using one of the routers as the DHCP server.

Similar Messages

Help setting up HP6500A for home network

I bought a 6500A all in one with wireless capability to support three computers at my home. I have a desktop running Windows XP, a laptop running XP and a laptop running windows 7. My ISP is Verizon FIOS. I set up the 6500 with a wired connection to the desktop and that works fine. I sent a test print from the laptop running windows 7 and that worked fine. When I tried to see the printer from the laptop running XP, I can't see it. I have loaded the latest drivers from the HP website and there are no firewall issues preventing the laptop from seeing the printer.
Any suggestions on what to try next? Upgrading to Windows 7 on this laptop is not an option.

There is a better way to set up this printer. You are trying to share one PC's USB connection which is difficult, buggy and will only share the printing function, not scanning or faxing.
Let's connect your printer to your FIOS router (disconnect from the desktop):
- Unplug the FIOS line from the router
- Turn the power off on the router, wait 30 seconds, then turn the power back on.
- On the front of the printer: Setup > Network > WIreless Setup Wizard - follow the directions
- Now find the IP address of the printer (it should be listed in the Network menu of the printer or on the Wireless Network Test in the Network menu)
- Type the printer's IP into the address bar of an web browser.
- On that screen you will find a Networking Tab, then on the left Wireless, then the IPv4 Tab.
- On this screen you want to set a Manual IP. You need to set an IP address outside the range that the router automatically sets (called the DHCP range). If you know what that is, set an IP outside that range but no higher than 254 (the last number in the address). If you do not know, use the current IP address.
- Use 255.255.255.0 for the subnet (unless you know it is different, if so, use that)
- Enter the same IP as the printer except '.1' for the last number, in the gateway and first DNS. Leave the second DNS blank.
- Plug in the FIOS line, reboot the router.
- Now on each PC, go to Start > All Programs > Hewlett-Packard and run "Add a Device". Add the printer as a Network device. Delete the old USB instance of the printer in Control Panel > Printers.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

Can I set up a small home network on mt BThub3

Hi,
I have two standard PCs one running on Vista and the other on XP also a laptop. They all successfully access the internet via a BT Hub 3. One computer connects via a LAN cable the laptop and the other computer connect via a wirless connection
If possible I would like to network these three computers via the BT hub for data transfer and also for the computers to use the single printer I have.
I have read various items about setting up the computers to share a printer but as I have no experience of networks and how to intergrate the computers through the hub.
Any advice would be greatly appreciated.
David

This is quite straighforward, but I would recommend that you look at one of the many help pages on the web, that describe in detail what you need to do.
The home hub does not really play any part in this, its just an interconnection point.
Here is a page to get you started with Windows XP.
http://compnetworking.about.com/od/windowsxpnetworking/ht/sharewinxpfiles.htm
and Vista
http://windows.about.com/od/networkconnect/ss/sharing_files_printers_all.htm
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

How do I set up a second home network that bypasses Open DNS?

I have been having trouble downloading and streaming itunes content because I use Open DNS on my network.
There have been many posts about disabling Open DNS to solve the problem but if I do that, my internet filter goes away.
I would rather set up a second network that bypasses Open DNS and use it only for my Apple TV.
Is this possible and if so, how do I do it?
I have airport extreme base station with a second airport to extend the range, mac desktop, mac laptop, ATV, several iphones and ipads.
I'm running OS X 10.7.5.
Thanks in advance!

Are you suggesting that I go into my Airport router settings and just blank out the DNS settings and then reboot it?
Yes, exactly. You can always input those addresses again, if it does not solve the problem.
OpenDNS may offer some advantages over your whatever your ISP uses for DNS but optimizing download speed is not one of them.
Maybe I have jumped to the conclusion that Open DNS is the problem when maybe it isn't.
It is possible. As I understand it, Apple's servers attempt to use a location near you to deliver iTunes content, and OpenDNS may result in pointing it to a less ideal location.
3 hours may or may not be normal for HD movie. The download speed depends on a number of factors that are difficult to surmise without knowing details about your network and your ISP.

Setting up a (small) home network

I have an iBook G4, an old iMac (running OS 9), an inkjet printer, a laser printer, Airport Extreme and an Internet modem. I would like to hook all of this up so that both Macs are connected to both printers, both Macs are connected to the Internet and that I have wireless connection for internet and printing (to both printers) available to the iBook. (The iMac is not Airport compatible.)
Right now, everything works, but we have to unplug the printers from one Mac to the Airport when we want to print. Is there a single piece of hardware we need to hook this all together, or is it going to be more complicated than that?
I know just enough about this stuff to get by and/or to be dangerous, so any advice would be appreciated.

You've got a cable or DSL modem, right? I happen to have DSL, and my DSL modem is actually a combo DSL modem/router/wireless access point. So life is a bit easier for me. But both of my sons are on cable, and I think they both have a single wired port coming out of their cable modem, to which they have to connect a wireless router (like an Airport Extreme Base Station). Are you like that?
If so, while I don't have an AEBS, as far as I know, an AEBS has firewall capability in it, and can configure for DHCP IP address assignment or static IP address assignment or a mix of both (i.e., it routes).
If my presupposition is true, there are a couple of things I would do to configure your network. First would be to put your DSL/cable modem in bridge mode (so the IP address assigned by your ISP is passed through to the external IP address side of your AEBS) and then configure the AEBS for NAT (i.e., it doles out 10.0.x.x addresses to everything in your residential LAN). Why? Because if both devices are doing NAT, then the modem is giving your BS a 192.168.x.x address, and then your BS is giving your computers a 10.0.x.x address. Some applications (most notably iChat) do not like double-NATting traffic through two firewalls/routers.
I'm not sure whether a device in bridge mode can have an active firewall or not. Never tried it. If it can, enable your firewall on the modem. If it can't, enable the firewall in the AEBS.
Now, check whether your printers can support accepting DHCP address assignments from a router. They may need to have static IP addresses (i.e., you may need to manually assign IP addresses to the devices). I don't know enough about AEBSs to know whether they can support a mix of static and dynamic IP addresses on the local LAN side, or whether it is all of one or all of the other. So you may need to disable DHCP in the AEBS and give it (on the residential LAN side) and your computers and printers a manually assigned IP address. If it supports a mix of static and DHCP, just give them IP addresses in the static address range, and your computers can still be configured to accept DHCP assignments from the AEBS. If the printers support DHCP, never mind all this drivel.
If you don't have enough wired ports for the iMac and one or more of the printers are not wireless-capable, connect a printer or two to your iMac via USB, and enable printer sharing in System Preferences > Sharing on the iMac. Other computers on your residential LAN should be able to find the printers so long as the iMac is powered up and printer sharing has been enabled on it.
Now have that other martini!
(If you find that my post solves your problem, or is actually helpful towards arriving at a solution to your problem, please consider clicking on either the "helpful" or "solved" buttons in the header of my post. Thank you.)

I want to set up a basic home network

I currently use a windows laptop with 500GB and an external hard drive for backup, we use almost all the available storage on photos, movies and music. We are light computer users, primarily it is for internet use, iTunes syncing, uploading digital photos and eventually basic schoolwork for the kids. We desperately need to replace our laptop and I don't want to always have to buy one with 500GB or more of storage as it is costly and probably not the best solution.
I want to switch to Apple hardware that allows me to have two things:
- The ability to store all our heavy data files in a central location that I can access wirelessly on my network from other apple devices
- A good automatic backup system
Eventually as my kids get a bit older they too will have laptops, currently we all use iPads and my wife and I have iPhones.
I spoke to the rep at the apple store yesterday and was advised that within my budget a good solution was an Macbook Air with 128GB and a 2TB Airport Time Capsule - which I duly bought. They advised that I could "split" the storage on the ATC using it to backup whats on the laptop and use it as an external hard drive for all the photos etc. I did ask if this left me exposed by now only having this data on the ATC but it was implied that this is pretty safe given the fail rate of ATC being very low.
That being said I am reading online that using the ATC as both backup and external hard drive is perhaps not a good solution. If someone in the know was to tackle my problem how would you do it? Would you do this completely differently or add another piece of hardware to what I have?
We do not want to buy a desktop as we would never use it and there is approx $500 left in the budget if I had to add another piece of hardware to make this work.
Thanks
D

So if I have the external hard drive connected to the ATC can I wirelessly access it easily any time I am in wifi range?
I think you may have missed the part where I said above......
Connect a USB hard drive to the MacBook Air and put all your photos and media on that drive.
I did not suggest that you connect the drive to the Time Capsule......since access to the media would be very very slow this way...and even more importantly...Time Machine would not be able to back up the hard drive to the Time Capsule. Time Machine can only back up the external hard drive if it is connected directly to the MacBook Air.
What about for Apple TV? Can it access the drive or for that to work do the files have to be on a mac of some sorts?
Basically, you will be moving the iTunes Media Folder that contains all of your media from the Mac to the external hard drive that is connected to the MacBook Air....and probably the iPhoto Library (or your image library) as well.
Then, you will have to "point" iTunes at the new location of the library so that it will know where to find the files. More details on how to do that in the link below. The title talks about changing the location of the media folder on your Mac, but you would use the same into to change the location to the external hard drive.
iTunes for Mac: Moving your iTunes Media folder - Apple Support
If you move the iPhoto Library over to the external drive, you will have to "point" iPhoto at the new location of the library so that it will know where to find it in the future. To do that, you would hold down the option key on the Mac while you open iPhoto and use the Finder interface to navigate to the new location of the iPhoto Library.

What do I need to set up a mac home network - complete Apple newbie

Okay. I've been using iPods and my iPhone for years, and I'm thinking about going full Mac. I plan to get a refurbished Macbook Pro from Amazon (haven't decided which one.) I currently have a Westell combo modem/router and am considering getting a wireless-capable external hard drive to hold more files. Ideally, then, my iTunes content would be available on any iDevice I may own. Can all these items connect or do i need more Apple-specific hardware?

I've seen, but never used, a combination modem/router - I've only ever used Cisco/Lynksys and Airport Extremes with separate 'stand-alone' cable/DSL modems. So I'm not sure that your setup will do what you're trying to do.
If you had an Airport Extreme, or another router with a USB plug, you could likely attach a drive to your router that could be shared by all users. Does your modem/router have a USB port?
Clinton

I cannot printany web pages or emails over a wireless home network. My OS is windows 7 and am using an Epson printer. I know I have the home network set up correctly as i can print files over the network.

I cannot print any email or web pages over a wireless home network. I know that I can print my files over this network, just not anything from the web or emails using Firefox. I am using Windows 7 and printing to an Epson.
== This happened ==
Every time Firefox opened
== when I set up the wireless home network.

The most likely reason for this is that the wrong printer is chosen in the File->Print window.
In Firefox, go to File->Print and click the dropdown box with printer names. Ensure that the correct network printer is selected, then try printing again.

Simple Home networking with Mac OS X Server

Hi all,
Can anybody give me a quick guide to setting up a basic home network with the use of Mac OS X Server for central administration?
I have 2 desktop macs, 1 mac laptop and 2 PC laptops and occasionally I have a number of friends bringing around their laptops.
I would like to set up all the basic services so that guests and registered users can access share points and home folders . I would also like to be able to use the DHCP service for this and be able to use basic services like DNS and AFP.
Does anybody know how to quickly set this up on a private home network?
I am new to Mac OS X Server so be gentle
Thanks.

John Detroye works for Apple education in Colorado, USA. He has written what i consider the best practical guide to setting up a Server system for use in a School, which is essentially what you want to do. Although he wrote it initially for 10.3 Panther Server, almost all of it still applies.
http://homepage.mac.com/johnd
Then:
Downloads - T & T etc. > Latest_Tips >Panther_Tips > mini-basic-0205a.pdf
a zipped 2.5 MB .pdf file is downloaded (about 25 pages) I strongly recommend you Print it out. I marked up my paper copy as I worked with it.

Small home network using a mini

Hello i'd like to set up a small home network. The component i have are:
A broadband connection via a cable modem
A mac mini which can act as a server (i'd like to provide access to shared photos and music, and connect an external HD for backup and storage)
2 airport wireless routers
2 macbook pro laptops and 1 mini all with wireless
Any suggestions as to the most effective way to link this all together?
Thanks
Tim

Hi Tim,
You've accidentally posted this on the iPod Mini forum, not the Mac Mini!
Mark

How to setup once an Airport home network and keep it alive?

Hello!
I have the following hardware setup:
1 - A Macmini 2009, Ethernet wired to my router which allows the connection to the internet;
2 - An HP Deskjet printer, USB connected to the Macmini;
3 - My wife's laptop PC, WiFi connected to my Mac.
My Macmini handles the internet connection the traditionnal way (Ethernet and PPoE) and has a static IP on it.
(Why a Static IP? Because I run my own Webserver.)
I set up a WiFi Home Network in order to allow my wife sharing both my Internet Connection and the Printer Connection.
Everything run well: fast and smooth. The PC has Internet and Printer access.
Problem is:
After each restart, I must re-create the Airport home network.
System Preferences-->Airport doesn't memorize the name, parameters and credentials of this network.
How can I fix this?
Many thanks in advance for your replies!
Best regards
Gerry

If your router is wireless, you should probably use the laptop to configure it to take care of the network (i.e. have the router distribute the IP addresses). Then you can connect your computer to it via the LAN port on the router. Otherwise, you would have to set up your computer to "share its Internet connection" (via Preferences/Sharing or Preferences/Network not sure). I don't think you need to create a network for this.

My iPad suddenly stopped connecting to my home network. It shows the network to. Choose from but there is no IP address or other information on the network page. It is set on DHCP and proxy is set at auto. Do I have another setting wrong?

My iPad suddenly stopped working with my home network. It shows the network to choose from but will not connect. When I look at details in that network it does not show IP address or any other info for the network. Setting is on DHCP and http proxy is set on auto. Network is active and can connect on wife's iPad and other home computers. Do I have another setting wrong?

Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Set up a Foscam wireless webcam through BaseStation 7.71 inside and outside of my home network.

I bought a X10 wireless Security Camera last year and it took me months to figure out how to set it up to access the video both inside my home and through my iPhone remotely, even on my Mac at my office. I thought I would provide my process of getting this done to help those trying something similar. Yes the X10 camera works as a Foscam Camera. I am very happy with the result. The biggest challenge was Port Forwarding the Apple Basestation but now that I figured it out, it is easy.
"How I set up a Foscam wireless webcam through Apple Hardware and software to work inside and outside of my home network seemlessly."
What you need:
-Foscam or compatible camera, (iPad or iPhone or Mac or better all three)!
-Service Provider Router.
-Apple Base Station, Extreme or Express. 7.71
-'ip scanner' (software for Mac, app for iPad/iPhone.
-CCTV Camera pros port scanner app for iPhone.
First REMOTE ACCESS
Go to www.dyndns.org and set up an account. For about $20/yr you can have 30 host websites. Write down the user name and password as you will need it later.
You need this service to have a stable website to see your camera outside your network later as 'ip' addresses can change but this site will remain stable.
Then after you log back in, create a 'host website' from the menu. When you are creating the host site, dyndns will give you lots of web address choices or you can create your own. Just pick one. Also, you will need the 'ip' of the server where the camera will be. Luckily the dyndns website tells you this, just select it. Write down the web address, click create and you are done this part.
Next you need to set up the camera.
CAMERA SET UP
Using an Ethernet cable, connect your Apple Base Station to your web cam.
You will need to run 'ip scanner' to see the 'ip' address for the web cam. Write down the 'ip'. Select it, then select "open device in". Pick browser.
A web page will be launched and you are given 3 choices. I picked the middle, 'push browser'. You are then asked for the user name and password for the camera. By default the user is 'administrator' and there is no password. Just click log in. You now will see a menu along the left, at the bottom it should say 'device management'. Select that. Another page will show and there are several important things to do here.
1. Alias - give a name to the camera.
2. Set the time from a server.
3. Users - set a user and password. Write this down as you will need it.
4. Basic network. Either check to 'Obtain IP from DHCP Server' or specify an IP you want to stay the same. You need the subnet and main DNS server and the Gateway (same thing like 192.168.0.?or 10.0.0.? or 172.16.0.?)
Decide on a port you want use. Write this down. The camera will reboot, you will need to log in. In the browser enter IP then : the port#. Like 192.168.0.?:80 you will need the camera user name and password.
5. Wireless-scan for the nearby network list. Pick your network, enter your password, click submit. It will reboot.
6. UPnP-check to use.
7. DDNS Service (this allows remote viewing) pick DynDns.org
Enter your DynDns user name and password.
Enter the long DynDns Host website you wrote down. Click Submit. It will reboot.
APPLE Basestation set up
Run Airport Utility on Mac or iPad or iPhone.
Tap basestation, tap edit, tap advanced, tap Port Settings, tap 'new entry', in description enter a name, enter HTTP port number you picked when setting up the camera in all 4 spots: public and private UDP and TCP. Enter the IP address you picked in the camera setup. Click done and again until the Basestation updates.
Run the CCTV app, pick 'tools', pick 'Port forwarding Checker'. Enter the port you selected to see if it shows open then you are good. If not go back through the steps.
Set up Foscam App on the iPad and iPhone.
Run App, tap Add Camera,
Label- enter a name
User- Camera user name
Password- Camera
Local camera address-the IP address eg 192.168.0.?
Port- the one you specified.
If it connects you will see the chain turn green.
Remote address- the long one from DynDns.
Port- the one you specified.
If it connects you will see the chain turn green.
Tap done.
If everything is entered correctly it will all work.
Trouble shooting, make sure the IP address for the camera is listed correctly in the Apple Router. If it changes on the network, just go into the Airport Utility and update that. Also make sure the dyndns address is correctly listed in the Camera set up.
If questions, just let me know.

Ok.. you have to work out the way you are going to access the TC..
There are basically three methods..
1. Direct access using AFP.. you need a static public IP and the TC as the main internet router.. then you need to turn on internet access and password the hard disk. The college has to have port 548 open.
If you do not have a static public IP then you can use ddns service but there is no client in the TC.. so you will have to figure out a way to update the service.
2. Use BTMM with icloud. This is the Apple method. It actually uses vpn..(the vpn is locked to apple use only but it is not available to end user).. The requirements are 7.6.1 firmware and lion or ML on a Mac computer. I am not sure of the ports because the link to the Apple cloud is separate from the vpn to your home system.
3. VPN.. that means you need to bridge the TC and use a decent quality vpn modem / router or combo thereof.
VPN are not for the faint of heart.. it can take a lot of work to get running but offers the best security.. you will need to change the network equipment in your house more than likely.. using a pc / mac as a vpn server is possible.. but messy.
There are also easy ways to at least access the home computer.. teamviewer for example. This is likely blocked by the college though.
Double NAT is where you put a router on a private IP behind another router on a private IP.. that makes port forwarding close to impossible.

Home Networking and Multiple Router Set up Problem

Router 1 (Main Access Point)
        X
(Routers 1 and 2 connected via a wireless bridge)
Router 2 (Wired Access Point)
    X
(Router 2 and 3 connected via a wired bridge)
Router 3 (Wired & Wireless Access Point)    Note:broadcasting under a different SSID
         X
Problem:
When I set up a wireless and wired bridge my Internet connection works perfectly and I can connect to the second SSID. If, however, I close out of my browsing session and come back to my laptop several hours later and open a browser, I get the “webpage cannot be displayed” message.
I suspect this has to do with IP addresses changing from the main router after a certain amount of time.
What could be causing this?
What can I do to stop this from happening?
Thanks for any help
EML

Running multiple router behind router can be tricky and may be the cause of your dropouts if you don't have it configured properly.
Cisco recommends using your best router as your primary router and DHCP server.
The best way to setup for home networks, in my opinion, is to use only one router, and put the other router(s) in bridge mode. Also, make sure your modem is not a router too.
http://www6.nohold.net/Cisco2/GetArticle.aspx?docid=28cee6a2fb0d4176a2210942d1d5836c_Setting_up_the_...
http://homecommunity.cisco.com/t5/Wireless-Routers/Guest-access-never-displays-password-prompt-on-EA...

Trouble setting up new router and home network

I used to have a home network. I managed to mess this up real bad, but it was working. Put in 16 port D-Link router. Main computer connects to internet and I can see all the computers. One Mac mini can access internet over the ethernet connection. MacBook Pro can access internet over Airport extreme but when connected over ethernet it won't connect. IMac and an older Mac Pro (G5) both running OS 10.4 won't connect by either airport or wired. Computers are all set to receive "using DHCP" Also on network is a Laserjet HP 4101 which no longer will print. What am I doing wrong here?

Problem partially solved by doing the following.
Modem to ABS. ABS has three ports, two of which connect to computers. Third port goes to a hub with 4 additional hubs. I can't seem to get anything to work through D link 16 port switch. Seems like I have a nice new D link paperweight since I can't get it to work. I am not sure why. Unfortunately with the 4 port hub I have no more room to grow the network and that is why I hope the D link would work.
One last problem one MacBook won't connect to airport. Other computers seem to connect to airport just fine. FYI to get everything to connect up and work required a full reset of the hardware and computers. Basically shut down computers, ABS, routers modem, hubs, including removing batteries for up to 30 minutes and reconnecting and turning them on. These things seem to have a memory and keep looking for connections that used to be there but are no longer. This full reset perhaps could have fixed things a while ago and I could have some of my money still in my wallet. Comments?

Setting up DHCP on home network

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