Configuration of the Airport Extreme problem and Vigor 120

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• The airPort Extreme (2007) and Time Machine

  Hi all

  I read the info "how to ask a good question" and apparently you need details. I'll try and be concise but informative with my problem. It has been a long journey to get to where I am, but hopefully, with a little help from this amazing community, I can get to my destination.

  Task

  To produce a backup solution Time Machine for the family spending as little money as possible and using the BRIC and broc, I already have.

  Equipment available

  I have a House with some ethernet cables for most rooms that through switches to allow a variety of, most entertainment devices to communicate. It is:

  1 x NAS/Media (ReadyNAS Duo v2) server,

  2 x TV (Samsung),

  2 x TEU (Beyonwiz),

  2 x Apple TV (a 2 nd generation the other is the latest version)

  2 x DVD players,

  1 x iMac.

  2 x 8-port switches,

  1 x 16 switch ports,

  1 x AirPort Extreme (2007).

  1 x Airport Express (age unknown but older than the extreme)

  1 x Fritz! Box 7490 Modem/Router

  Courses in place

  All the associated TV stuff are connected in 2 rooms through ethernet via switch 2 x 8 ports switch 16 central port and then to the Fritz! modem/router box.

  There are also all the usual WiFi going on with mobile phones, iPads and laptops.

  Remarkably, it seems just to work!

  However, I want to add some backup data on our computers. I tried to do by using the ReadyNAS as it is supposed to support Time Machine, but I can't it to appear as a backup destination. So, I thought, as I have AirPort Extreme, I add it to the network and attach a USB HDD for Time Machine since it is supposed to be easy. However, I've been home for hours and cannot make the HARD disk appear in system preferences/Time Machine.

  I plugged the Airport Extreme in one of the switches 8 port said to create a wireless network with the same details as the Fritz! The box according to another article of the support (Airport Extreme wired AND expand network - need of entry). Airport utility shows me Wi-wired connections and seems to work.

  I look at the AirPort Extreme disks tab and can see the attached USB drive here. However, it does not appear as a choice of drives available for backup in Time Machine preferences. I tried 2 different discs with the same result.

  The Question (finally)

  How can I get Time Machine preferences to show the USB disk attached to AirPort Extreme as a valid choice for backups? If anyone can give me a little help in the right direction, I would be very grateful.

  Thank you for reading this,

  Grant

  Unfortunately, the key here is that the version of AirPort Extreme you have does not officially support Time Machine backups on a drive to the USB port of the device.

  The only version of the AirPort Extreme, which will officially support Time Machine backups on a drive in the USB port on the airport is the 802.11ac current version that looks like a "tower". Older versions of 'flat and square' of the AirPort Extreme don't support Time machine with a USB drive attached.

  To check, please see "Time Machine in charge of USB drives" in this Apple support document... AirPort base stations: discs on USB - Support Apple

  Support for time Machine to USB drives

  OS X Time Machine supports compatible USB drives encrypted, related to the time Capsule (802.11n and 802.11ac) AirPort and AirPort Extreme (802.11ac).

  Given that the average life of most wireless routers lasts about 5 years, and your AirPort Extreme seems to be about 9, your AirPort Extreme did very well for you... much better than the average. It might be time to start thinking about a replacement who will be responsible for backups Time Machine... either a time Capsule (i.e. an AirPort Extreme with a built-in hard drive) or another AirPort Extreme.

• The Airport Extreme has download slow unless its an apple product

  I need help.  I have an Airport Extreme router.  I run a HP all in one office, two smart TV, Wii and two boxes on my router.  Not all work at the same time, nor do two pass at the same time.

  I check my router on Mac speed: 100 Mbit/s easy.  I check my iphone: 100 Mbps.  I checked the HP desktop computer: 30-50 Mbps.  I haven't checked the Wii, Smart TVs do not open always Netflix, my boxes go slow and buffer for long periods of time.

  There must be a setting that does not allow non-Apple products to run more slowly.  I pay 100 Mbps and expect to receive 100 Mbps on the Airport Extreme for all products, not just Apple products.

  What I could try or have I missed that should be done so all non-Apple products get the speed of download and Apple products?

  I called support and they had me change the channels in the configuration of the Airport Extreme wireless.  That did not help.  I changed them back and now the iPhone runs slower, below 50 Mbps upload when you fill out a speed test on www.speedtest.com.  I'm sitting in the same place.  It makes no sense at all.

• Several Airport Apple ID devices disappear shared devices and Software Configuration of the airport

  We have three Airport extreme and two Airport Express devices in two offices in the city.  Some time in the last two days, they all stopped appearing in the sidebar of Finder 'Shared' category (if they had attached disk storage) and they stopped from appearing in the Configuration software of the airport on any of the Mac on these networks. (They always seem to be correct, routing traffic, however).

  For a while, we left a desktop completely alone as a control group and did all our testing and troubleshooting in the other office.

  We-hard reset (to the factory configuration) all devices from the airport to an office. They began to appear again. Then we started to re - configure them again.  At the time wherever we had updated the devices they had disappeared again.

  So, another factory discount based configutations for each device to this facility. Then we added slowly in pieces of their configuration.  When airports have received Apple ID and associated passwords for associating with iCloud/BackToMyMac/WideAreaBonjour (depending on what you want to call it), the airport devices disappeared from the airport Setup.

  If we tried to configure another device from the airport to extend a network of 'invisible' airports, the new airports were "unable to find" one of these networks to expand.

  If we reset all devices without providing them with Apple ID and passwords, they worked mainly as you would expect. The main difference being now do not appear as having been recorded as BackToMyMac/WideAreaBonjour devices.

  One side for people dealing with this note: If your router are invisible, but they are configured to be configured from the EXTENSIVE worldwide network, you can use "File-> configure the other" and specify the address WAN of the missing aircraft and get this screen access as one would generally. From here, remove all the Apple ID associated with these devices, press "Refresh" to save the settings and they seem to reappear magically in the Configuration of the airport software.

  In that State, storage seems to be available, but only for devices in Domain Local (direct connection). Airports without AppleIDs will not appear in the field to iCloud/BackToMyMac/WideAreaBonjour, and it's as expected, given that these IDS is the means for the identification of their field.

  If someone else has noted these behaviors and if so, have an idea about specifically when they first appeared? Is there by any chance someone who knows of any change in registration or the MWAC of multiplication?

  Did you approach the problem exactly as I did in the past, and having encountered problems of the CCMM literally every version of OS X. They were all distinct problems with individual characteristics, and in some cases the solutions exist. Having said that the CCMM has been completely reliable recently - which means running the most recent El Capitan release on all my Macs. The initial versions (i.e. OS X 10.11 to 10.11.3 maybe) didn't work at all. I don't know which version fixed whatever the problem was, I am sure he has not worked for someone else.

  The same real place with Yosemite and previous versions as well. CCMM did not reliable until the exit "point three or four."

  Through these experiments, I believe it should be a pretty fast connection. If the connection between a Mac and all the others does not meet this requirement (whatever that is) all you will be able to determine, it's that the CCMM fails.

  Apple is characteristically silent about the technical aspects of the CCMM, probably because of security concerns. Nobody outside Apple knows how it works. If you're still having problems, I encourage you to contact them. After mentioning predictable you corrective raw materials (the two following links) you will be put in touch with someone who will look to what is false, providing diagnostic assistance and send your information to engineering. If it's something they should fix, you'll know not to the point of an OS X update is published.

  Set up and use Back to My Mac - Apple Support

  Get help using Back to My Mac - Apple Support

  With all the conversations I had with Apple on this topic (which were many, involving a large amount of tests) not once they disclose any causal factors individual, other than to reiterate the need to run the last OS X, versions and the latest versions of firmware for their routers. In your case, that means probably that your Mac update to El Capitan. It is after all the very first recommendation in their document of support above, until you do this you will still not get in step 1.

• Connectivity with AT & T-Motorola 3360 and Airport Extreme problems

  Bought a new extreme-Airport (7.7.3) to replace my old AE after 9 years of service.  The installation procedure, but could not get the airport to connect with my modem (Motorola 3360).  Called at & T and they crossed put me the modem in Bridge mode and which seemed to work.  But only temporarily (about 5 hours).  Restart the modem and the airport was not working.  Troubleshooting I tried to plug my MacBook directly into the modem, but even the computer couldn't get an internet connection.  Another call to AT & T and they reconfigure the modem to their end.  After 90 minutes and try everything they could, they have finally admitted defeat and told me that they could not solve the problem.

  However, after a fairly exhaustive search of this forum, seems to be two issues that many people is with Airport extreme.  One is that the modem (in this case a Motorola 3360) is perhaps not fully compatible with the airport.  The AT & T support person was not aware of this until I asked about it, so she did a quick search and was rather surprised to see that there is a lot of people having problems with the Motorola Modem.  She told me that they use no more Motorola modems but ship the 6200 of Netgear.  "All know issues?", I asked.  She sought and, to his surprise, even once, there was.

  So, first question.  Does anyone know a modem that is compatible with the airport or use one that they had to limit problems with?

  The second question prevailing seems to be with the IPv6 protocol.  Anyone know if there are problems with the AT & T IPv6 protocol and the most extreme airport?  I did not disable IPv6 yet to see if that helps.  I thought I'd ask here first.  Couldn't find anything on the AT & T site.

  When I return from the road (great place to go to get away from technology) I will make a new round of full power of all the components and try Setup again from scratch.

  Any ideas or suggestions would be greatly appreciated.  Miss all know profanity.

  Thank you.

  Any other relevant information: 6.3.1 the utility Airport, Airport Extreme 7.7.3, MacBook Pro running 10.8.4, modem Motorola 3360, AT & T high speed DSL, shoe size 11-1/2 wide.

  When you have configured the 3360 as a 'bridge', this would mean that the AirPort Extreme should then be put in place to provide the PPPoE connection service. The airports are not known for their reliability in this type of installation... no matter the type of modem that you can select, so I drop this method as a connection option.

  If you want to keep the 3360... and you have time to experiment... then you can set the 3360 to its original default settings and configure the router from the airport most convenient to connect using DHCP in router Mode of DHCP and NAT.  That will produce what is called a message Double NAT, but maybe it's not of concern on a simple home network, and Apple provides you with the option 'Ignore' the Double NAT, so the airport will display a green light instead a light orange blinking slow.

  You need to try this configuration for a few days to see if the Double NAT will be a problem or not, because it is not possible to predict the effect of a Double NAT on a network... you have to test a few days see how things behave.  If this configuration works well, for you, then you can leave it as what.

  Please note that I do not recommend this type of installation, just suggesting it as an option this work could , if you want to keep the 3360.

  How Double NAT affect IPv6, I can't tell, since I did not use att for several years, and I'm not familiar with their implementation. On wired, IPv6 works fine on the airport with Comcast and Time Warner.  We can provide these parameters for you if want, but have no idea how well... (or if)... they will work with ATT.

  If the installation of Double NAT does not work, your best option would be to go there and get a modem/router or gateway to ATT device and then set up the most convenient airport in Bridge Mode works correctly with the modem/router ATT.  You will turn on the routing of ATT function in this type of installation, but the airport can also produce a signal from the wireless network that you can use.  The modem/router ATT will also provide a wireless signal that you could use for guests, or disable the feature, if you do not need two wireless networks.

  This may also be the best option if you want to configure IPv6 as IPv6 of ATT service must be compatible with the modems/routers and gateways.

• Network with Airport Extreme problems connected to the Linksys switch

  I have a wired network in my house.  It has the following configuration: Modem base station Airport Extreme for Linksys switch and then all wired connections.  It is in a wiring closet in a room upstairs.  I have 2 other extremes from the airport, to spread out of the range, but they are currently disabled and disconnected from the network until I have found why I get auto ip address on several of my wired connections.  I have reset the modem, EI and switch.  More wired connections seem to be working very well, but there are 4 or 5 who say that the ethernet cable is connected, but it can not connect to the internet because of a self assigned ip address.  I thought maybe it was a problem with the port of the switch, but when I plugged a cable work in, everything worked again.  Thus, for example, on my iMac, in a study downstairs, I had plugged on the ethernet port in the wall.  He let me only to connect to wireless internet.  He says the ethernet connection had a self assigned ip.  I went upstairs and took the cable from the switch and directly connected to the Airport Extreme, and then connect to this iMac worked fine via ethernet.  So I'm really confused as to why it does not work when it is connected to the switch.  Why are only a few connections ethernet works and others not?

  Any help would be greatly appreciated.

  Why are only a few connections ethernet works and others not?

  Because either you have a bad port on the switch (unlikely, but possible) or a wired Ethernet connection bad, or maybe both ends of several of the Ethernet cables (99% of the time, the problem is in the wiring or connectors Ethernet... not the switch).

  But, we must test the switch first and then work from there.  It might be much easier to call a guy from wire or the custom installation specialist to do all this for you, but if you want to give it a try... Here's how.  It is not difficult at this stage, just take some time.

  Unplug the switch except the Ethernet cable that connects the AirPort Extreme to each cable Ethernet switch.  Label each Ethernet cable with a number or a letter you can install the wires in their original position on the switch.

  Use of a laptop computer with an Ethernet port and a short, spare Ethernet cable... virtually no matter what length will make... and turn off the WiFi on the laptop so it should use Ethernet to connect to Internet.

  Test an Ethernet port on the switch with the laptop and the Ethernet cable to make sure that you have get a good Internet connection. If you do so, test the next port of the switch. Continue until all ports of the switch has been tested.  With luck, they will all work.

  If this is the case... which is likely... then you know that the Ethernet switch is working properly.

  Now things get a little more complicated. Ideally, you have documentation that tells you what Ethernet cable goes to what area of the House. If you don't, just connect the Ethernet cable to the switch... then go to the other end of the Ethernet cable to the wall outlet and connect the computer laptop and short Ethernet cable to the wall socket.

  If you have no documentation to indicate where each cable goes, so go ahead and connect all the Ethernet cables to the switch.

  Still, make sure that the wireless is disabled on the laptop so that it can only connect to the Internet via an Ethernet connection. Check if you can get a good connection Internet in this way. If you can, then you know that the individual Ethernet cable and the Ethernet port on the wall are working properly...

  Test other areas one at a time the same way.  You are very likely going to find Ethernet cables or a wall of ports that do not work properly. The hardest part here is that you... or a wire guy... will have to check the Ethernet cable at both ends to ensure that the Ethernet Sockets have been installed correctly.  It is not easy. The wires are tiny and its easy to get involved.  Installation of new Ethernet cards, it's really a job for an experienced guy who will provide hopefully a cable Tester well when it comes.

  Some Ethernet will certainly be replaced.  In rare cases, the cable itself has a break somewhere... and it's not easy to fix something like this, without pulling new cable... that would not be possible according to the House provision.

  When you know that all ports on the switch are working and all ports Ethernet wall around the House work... so... we can get the network set in place and working properly.

• I just installed an airport extreme router and WiFi works, but the status light still flashes.

  I just installed an airport extreme router and WiFi works, but the status light still flashes.

  Open airport utility... Click EI... and see what the cause of the problem. It will give the list of questions on the summary page. Click on each of them and he will offer you even solutions.

  for example the firmware needs to be updated... nothing major... or DNS is wrong or double NAT...

  Without our crystal ball, we do not know what is the issue.

• Problems of ' 09 Time Capsule to the Airport Extreme upgrade

  I with success the setup a new Airport Extreme (AE) and I want to continue to use my Time Capsule (TC) 2009 as a backup drive. However, I have questions. What is the right way to implement these devices to play nice?

  I have currently the modem ethernet fall on the AE WAN ethernet. Then I have another ethernet cable connecting the AE LAN ethernet in the TC WAN.

  In addition, I have the TC Network Mode as 'OFF' and his router Mode as 'Off (Bridge Mode).

  Is everything is OK?

  All correct so far.  Also check the Internet tab to ensure that the TC is to connect using DHCP = AirPort Utility.

  

  At this point, what other problems are live you?

• provider changed vague Qwest and now one device connects to the net.  Seems to not be recognizing the airport extreme.  Patches?

  Decided to change providers.  Network domestic fine fixed by extreme airport which has been consulted by 9 apple devices and windows device.  After the wave was installed yesterday, the only device able to connect is the cell that was active at the time of installation.  Is this a problem with my airport extreme or vague does not not with mac?  All the patches would be appreciated.

  After the wave was installed yesterday, the only device able to connect is the cell that was active at the time of installation.

  Sounds like Installer connected your laptop directly to a modem to put in place the new connection.  If that's what happened, then the modem will recognize your laptop, but it will not recognize the AirPort Extreme, then it will appear as if only your laptop can get a connection.

  The modem and AirPort Extreme should probably be reset and then set it up again. We'll know more soon.

  Can you provide the number of brand and model of the modem that was shipped with your service?

  What operating system uses the laptop?

• Xfinity X 1 modem/router is compatible with the Airport Extreme? How it should be configured to maintain my wireless network?

  I got a modem Comcast/Xfinity upgrade. Xfinity X 1 modem/router is compatible with the Airport Extreme? How it should be configured to maintain my wireless network?

  Whenever you change the modem or modem/router on a network, AirPort Extreme will be reset to the default settings and then set it up again to work properly with the new modem. For this he would be...

  Turn on AirPort Extreme for a few minutes... If it is not already turned on

  Hold in the reset button on the back of the AirPort Extreme for 7-8 seconds, then release it.

  Allow a minute for the AirPort Extreme restart to a slow, flashing amber light status

  Make sure that an Ethernet cable connects to one of the four LAN <-->Ethernet ports on the modem/router on port WAN "O" on AirPort Extreme

  To start the Setup program, click the WiFi icon at the top of the screen on your Mac and are looking for a list of the new AirPort base station

  Just below that, click directly on the AirPort Extreme and then follow the prompts for configuration "Wizard".

  When you configure AirPort Extreme once again, you can use the same wireless network name and the same password that you used with AirPort Extreme with the 'old' modem, if you wish, or use a new wireless network name and password

• Failure of the Airport Extreme and Airport Express

  Airport Extreme not to talk to the device POE from the antenna of radio after a thunderstorm (lightning).  Plug the POE ethernet cable directly into Mac works.  Airport Express lights.  Airport Extreme appears, but there is no internet connection.  A port can be fried on the Airport Extreme?

  Yes, but unfortunately the port that will blow is that ethernet is plugged.

  If it's WAN then you do not have a way to use the airport as a router... only a bridge device.

• Airport utility: green points on the AirPort Extreme &amp; Internet; Mini Mac does not connect to the internet.

  Airport utility shows green points on the AirPort Extreme and the Internet, but my my Mac mini does not connect to the internet. IPhones and 2 portable Windows connect very well, and see all the devices on the home network. The problem occurred after that PSI has swapped an ancient for a Comtrend CT5072T DSL modem. I tried to stop and things start back up as if the installation of the internet for the first time. No joy.

  The airport connects using DHCP in Bridge Mode

  The router address is 192.168.80.1

  Address IPv4 is 192.168.80.2

  DNS server is the same as the router, but grayed out

  Mac Mini IPv4 Address is 192.168.80.3

  IPv6 automatically configures

  Also updated the firmware of the airport; no change.

  ISP guy was friendly but puzzled. He started at the top floor level Tech, so I do not know when I hear back.

  Any ideas to fix?

  Thank you.

  Post edited by: en maschera

  but my my Mac mini does not connect to the internet.

  The problem occurred after that PSI has swapped an ancient for a Comtrend CT5072T DSL modem.

  Hello

  Network preferences may be damaged.

  Open the Finder. In the Finder menu bar, click go > go to folder

  Type or copy paste the following text:

  / Library/Preferences/SystemConfiguration

  Click OK, and then move all files in the SystemConfiguration folder to the trash.

  Restart your Mac. See if that makes a difference.

  Your Mac will generate a new SystemConfiguration folder for you.

  Then open AirPort Utility located in HD > Applications > Utilitiies

  Make sure that both Internet and Extreme are green.

  

• Add a second macbook air, now the airport extreme has stopped working

  I got a new (for me) 2012 macbook air to replace my MBA 2010 last night. I had another macbook air on the network to download some files in iCloud. As soon as I started the MBA new upward across the network crashed. (Features were always connection ac Airport Extreme router, green light, but no internets).

  Restart the router helped briefly before the problem comes back. When I connect with the new MBA, I had seen an error there are two Macbook Air on the network and it was changing the name of one of them.

  I read somewheres that download great traffic and a lot of features sometimes overwhelms the airport extreme (huh? not very extreme), so I made the turn power off the wireless on iPad, apple tv and the old MBA. This, most reboot the router and the modem seemed to do the trick for a while, until that there no more.

  I read around DiscoveryD and the problems with Hello. Will try this angle when I go home.

  I see here that maybe I need to reset (rather than just reboot) my router now that there's a new kid on the block - the new MBA.

  Any other ideas?

  Where did you got your 'new' MacBook Air? Apple or an evening private? If the latter, it can be configured as such not "play well" with your existing home network. If you have received this by a private party, I strongly suggest you reload a clean version of the feature of MacOS X. In this way you will start with a Mac "out-of-the-box" and should have an easier time getting connected to your network without problem.

• The Airport Extreme WiFi intermittent 2nd generation

  I'm having a weird problem with loss of WiFi on my Apple Airport Extreme.

  My 2nd generation that apple Airport Extreme Base Station began to close its WiFi broad signal several times.  It happens usually after 60 minutes or less works very well.  Power on and the new runs for awhile until it stops again the WiFi.  Green light normally forward either static rest without flickering to indicate data transfer, or it will just dark.  Sometimes it will turn off WiFi and then restart WiFi a few minutes later and appear to be good.  But mostly it just stops and I can, he extinguished/turned on to operate correctly with the WiFi again.

  Airport Extreme is connected by ethernet cable to my modem/router main fiber (which is a different floor home) and it is set to "Bridge" Mode  It worked without any problems and I did no changes to my system.  My ISP did update my modem broadband fiber a few weeks ago to a "Virgin Media Hub 3.0"I understand was made by Compal.»  It seems to work perfectly and I have no problems with speed download or reliability in wireframe.  I was away from home for about a week and was able to access my wireless IP camera remotely via my Airport Extreme with no problems.  The problem started almost immediately on my return, but, as I said, I did no changes to my network.  I have never had this kind of problem before with my Airport Extreme.

  I am running OS X Yosemite on an iMac that is connected by a cable ethernet to the Airport Extreme and seems to work very well even when WiFi is de-energized on the Airport Extreme.  Airport utility reports the airport as current firmware version 7.6.7.

  I used network utility, Fing, and it showed that my Airport Extreme has multiple IP addresses, which seem to conflict with the IP address for my three AppleTV.  I manually changed the IP addresses of the Apple TV to another IP address not conflicting, but Fing always shows that my Airport Extreme has three IP addresses and I still have the problem of WiFi.

  Any other suggestions on a probable cause of this problem or the best way to solve the problem would be much appreciated.

  Thank you!

  The question is the 2nd generation AE is now too old.

  I would say the power supply (external or internal) is dying.

  It service life is approximately 5 years... your must be 8 years old. so the solution is simple... buy a new one... or I'll tell... Newish...

• Why is my slower than wifi ethernet download speed when using the airport extreme?

  Hi all

  This is my first post here, so please bear with me. I currently own stunted 2011 Macbook Pro 13 inch and an extreme A1521 from the airport. My ISP has promised 50Mbps downloading and sending 10 Mbps. When I connect my MPro via ethernet/wi-fi to my modem I get as promised. When I connect my MPro via wi - fi to the extreme I get 48Mbps download download 9Mbps and it's ok. However, when I connect my MPro via ethernet to extreme I get 8-9Mbps download and 9Mbps. Anyone know how to fix this?

  If you check the 'fine print', your ISP has promised "up to" 50 Mbit/s and 'up to' 10Mbps.  The ISP might provide more than that during periods of slow activity, like the days of the week during the day, but much less during evenings when there are many more users on the Internet.

  When I connect my MPro via ethernet/wi-fi to my modem I get as promised

  I assume that you meant to check the Ethernet connection, you disable WiFi on Mac when you do this. And unplug the Ethernet cable when you check the speed of the WiFi, correct?

  If so, this tells you that the Ethernet port to both the modem and the Mac work properly, and WiFi work correctly as well.

  When I connect my MPro via wi - fi to the extreme I get 48Mbps download download 9Mbps and it's ok.

  If this tells you that the Ethernet connection between the modem and the AirPort Extreme works correctly, and wireless works fine on the AirPort Extreme.

  However, when I connect my MPro via ethernet to extreme I get 8-9Mbps download and 9Mbps.

  Well, you know that the Ethernet connection between the modem and AirPort Extreme works because you can register 48 Mbps Wireless.

  Thus, the possibilities are narrowed to two elements at this stage:

  (1) the Ethernet cable is defective or making intermittent contact. Try another Ethernet cable, to ensure.

  (2) If you have turned off AirPort Extreme and rebooted several times, and you know that the cable between the Mac and AirPort Extreme works properly, then you have reduced the question down to the Ethernet on the AirPort Extreme, which is probably defective switch.

  If you have not already done so, try other ports Ethernet on the AirPort Extreme.

  As a last resort, perform a reset material on AirPort Extreme and put up again. To perform the Hard Reset... power on AirPort Extreme for a few minutes, then hold it pushed in the reset button on the back of the unit (near the AC power plug) for 7-8 seconds and release. Allow a minute for the AirPort Extreme restart orange light flashing slow.

  I once went through two consecutive airport extremes with the same question about 8 months ago, so it can happen.

  If you're still having problems, then it is time to take the AirPort Extreme of Apple Store... If you have one near you... or contact the Apple Support directly by clicking on 'Contact the Support' in the upper right area of this web page.

  Good luck!