Ethernet Connection (port?) Dead

After using my ethernet (DSL) connection for three years, it suddenly died. I can connect via aiport, but not via ethernet. I installed a clean OS, corrected permissions, performed a hardware test, checked, rechecked, rechecked, etc. etc. etc. my ISP connection, TCP/IP and all the usual suspects. Anyone have a suggestion on how to proceed? Is an ethernet card a useful substitute? Thanks much!
iMac G5 Mac OS X (10.4.6)
Powerbook G4 Mac OS X (10.3.9)

There are still innumerable possibilities.
Is your Location (Apple menu/Location) on Automatic?
In Network Preferences, what is your Network Port Configurations priority order? Which are checked?
You are absolutely sure your DSL ethernet is working?
The ethernet cable is good?
Is there an "activity light" that should blink when an active ethenet cable is plugged in?
Is the Airport that works YOUR Airport station? In other words, your do you have a router, Airport or otherwise, on your DSL and have both ethernet and WiFi of your own? Or do you only have ethernet and find Airport works elsewhere?
Sorry for the grilling, but we don't know your setup.

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Does the newest macbook pro with retina display have an ethernet connection port?

I am looking at getting a computer for college and am trying to decide between the newest version of the macbook pro and the one with the cd/dvd drive in it and the way i get internet connection in my dorm room is going to be by an ethernet cable so i am trying to cover everything. Thanks for all of the help!

does the newest macbook pro with retina display have an ethernet connection port?
No.
-> http://www.apple.com/macbook-pro/specs-retina/
But you can get a Thunderbolt to Ethernet connector.
-> http://store.apple.com/us/product/MD463ZM/A/thunderbolt-to-gigabit-ethernet-adap ter?aid=www-k2-macbook%C2%A0pro+retina+-…

1 Ethernet Wan port dead other 2 work

I have a Airport Extreme 802.11n 2 of the Ethernet ports work fine the 3rd one went dead I switched to an open one and it works the green light dose not lit on the dead port I tried rebooting it but no go. I would rather not set set it but if that would fix it I would give it a try it seems like a hard part issue to me.

It would be extremely unlikely that a reset would solve the problem that you have.
If the AirPort Extreme will function with the bad port, then you can set it up that way and not use the bad port. If you need more ports, you can add a Gigabit Ethernet switch to one of the good ports on the AirPort Extreme.
Apple does not offer repairs on the AirPort Extreme. They will exchange the product if it is in warranty or you have AppleCare in effect.
If the device is out of warranty....it is possible that a shop might be able to repair the product. But, the cost of repairs might be more than buying a new AirPort Extreme.

EFI firmware update 1.4 killed my ethernet connection

Trying to set up my sister's new 20" iMac.
It came preinstalled with 10.5.6. We hooked it up to her cable modem with an ethernet cable, it got a DHCP'd IP address, I immediately ran software update and it downloaded a slew of stuff. After the initial update and restart, it went into the firmware update procedure for EFI Firmware Update 1.4. After the update we got the expected loud beep and restart, but now the ethernet connection is dead.
The computer claims the ethernet cable is not plugged in - network diagnostics says it can't do anything - to contact our network admin.
I tried another cable, I tried recreating the "Ethernet" connection in Sys Prefs->Network and also tried creating a new connection with ethernet but ethernet remains stone dead.
Anyone see this before?
Jeez, this thing only worked for like an hour :-/

Solved:
Tried 2 ethernet cables and all ports on the router with no luck.
Reset the PRAM with no luck.
Tried another router port - success!
Some experimenting reveals that the router port the computer was plugged into at the time of the EFI 1.4 update is now dead. It was working fine up til the firmware update but now won't work with any combination of cables or computers.
The iMac connects fine over ethernet to all of the other router ports with all 3 cables we have here.
Weird. I cant imagine that the firmware update somehow killed the ethernet port on the router. Timing sure is strange tho.

Cisco 3750x no ethernet connection

Hi,
I seems to have a weird problem whereby clients are unable to get an ethernet connection (Port no LED lit/not connected) when using mac. Sometimes there is connection after multiple insert/disconnect using the same cable to the Mac client. This has also be tested with a direct connection between the client and switch (without going thru the backbone cabling). If I was to try using Windows client, there does not seems to have such issue.
Further observation; from the switch; if a shut and no shut was performed on the port connected to the client, it would cause the connection to be "UP". Not too sure if anyone may have seen similar issues of unable to get connection "UP"? The firmware on the switch is running 15.2(1)E2.
Any suggestion is appreciated.

You've got a 3750X? Good. This means you can test the cable run using TDR.

Failed while creating virtual Ethernet switch. Failed to connect Ethernet switch port

Hello Folks
I am completely stuck with the configuration of my virtual networks. I have one logical switch left to add to one of my Hyper-V 2012 R2 hosts when I started getting the error below when I try to add logical switches to either Hyper-V Host. I have been using
the document. 'Hybrid Cloud with NVGRE (Cloud OS)' to implement the virtual networking. Basically using the exact configuration that is in the document. I have added the PA Logical Network and the Network adapters and added the logical switch for it to my
hyper-v 2012 R2 host and everything was fine. I am now trying to add my ISCSI Logical Switch to the host and this is the error I get. My other Hyper-V host I get this error for any logical switch I am trying to add. Can someone help me with this error. I haven't
been able to find any information about it.
Also a some quick info on tracing an error like this so I can figure out what is causing it.
Thsi is my configuration so far
So as far as I know everything is peachy untill the error below. Dead stop now
Error (12700)
VMM cannot complete the host operation on the 08-NY-VHOST01.accounts.ccac-ont.ca server because of the error: Failed while creating virtual Ethernet switch.
Failed to connect Ethernet switch port (switch name = '******', port name = '88C16766-ED02-4AC0-8CD7-660AC9D424DD', adapter GUID = '{FAF431D8-0124-4E40-BB3B-9234BAA02973}'): The system cannot find the file specified. (0x80070002).
Unknown error (0x800b)
Thank you for your time
Christopher
Christopher Scannell

notice your GUID? you may want to consider ensuring that is the same GUID associated in your database. Sometimes during data corruption theres a smidge of a chance your sql database kind of either pulls old guids esp if this was reverted to snapshot
without it being powered off etc.
I would try that first. then i would consider if you get to configure that with your current liscense associated with the host. I would need way more info to help any further

Dead Ethernet Connection?

I can no longer access the internet. I tried different cable modems, cables & went through the utilities on the Mac Disc & still it doesn't work.
Ea. time I tried to log on, the computer (which still works) would say Network failed, Server failed, etc., etc.
I didn't have internet access after a severe lightning & thinderstorm went through our area a few weeks ago.
If the Ethernet is dead, what can I do to get internet access or networking capability again? Also, if I went the wireless route, would I not still need to have an operable Ethernet connection? Thanks for any and all input. I hope I won't need to get another computer.

I have a similar problem. I went out of town, and came back to a dead modem. I ran out of room on my serge protector, and didn't have the modem plugged into a serge protector. I now bought a new modem, and a serge protector that protects phone lines and cable lines as well.
I can get internet access now. via the USB cable, but not via the ethernet cable. By plugging into an ibook, I discovered that the ethernet cables are still working. But I have vonage phone service, which still isn't working. I think the serge came through the cable, to the modem, which is totally fried, no lights or anything. Then to the vonagae phone device via the ethernet cable, then to the mac mini via the ethernet cable. The phone device still has some lights, but it's not fully working.
I think I need a new phone device. My question is this: is there some sort of ethernet card inside the mac mini that can be replaced? Or should I just buy new phone device, and connect the modem via USB port?
Mac Mini Mac OS X (10.3.9)

Nothing is connected to the ethernet WAN port

I have a 5th generation AEBS and FTTH. When I plug it into the wall, it reports that nothing is connected to the ethernet WAN port, but if I plug my MBP into the wall I get an IP address and can hit the Internet just fine.
I called tech support and they said that everything looks great from their end, and that there is nothing that they can do.
What I have found is that if I plug the cable from the wall into a gigabit switch, and then plug the AEBS into the switch, everything works fine!
Any idea what can be going on? TIA!

This is increasingly a problem.. the AEBS is not actually negoiating the speed correctly with the ONT supplied by the ISP.. it happens a lot with cable modems as well.
Using the switch allows the two devices to negoiate speed correctly.
You can do the same thing with old utility..
Install 5.6 utility on your computer. Here is a method.. there are others.
How to load 5.6 into ML.
1. Download 5.6 for Lion.
http://support.apple.com/kb/DL1482
Click to open the dmg but do not attempt to install the pkg.. it won't work anyway.
Leave the package open on the desktop so you can see the file. AirportUtility56.pkg
2. Download and install unpkg.
http://www.timdoug.com/unpkg/
Run unpkg on the desktop.. If your Mac refuses to run the software, because it wasn’t downloaded from the Apple store, go to security in preferences and allow other software to work.. this is limitation of trade methinks. You can set back later if you like.
Now drag the AirPortUtility56.pkg file over to unpkg.. and it will create a new directory of the same name on the desktop.. in finder, open the new directory, drill down.. applications, utilities .. there lo and behold is Airport utility 5.6 .. drag it to your main utilities directory or just run it from current location.
You cannot uninstall version 6 (now 6.3 if you updated) so don't try.. and you cannot or should not run them both at the same time.. although I have had no problems when doing so.
Now with a real utility instead of the toyland edition you can do something about the WAN speed.
Set to either 100mbit full duplex .. that would be my first option.. and second is 100mbit half duplex.
Another alternative just popped up.. buy a crossover ethernet cable.
https://discussions.apple.com/message/23236139?ac_cid=tw123456#23236139
These cables are no longer required with modern equipment but you will find stores still stock them. For some strange reason.. in the one case reported that worked.. this indicates that the TC has some fundamental port issues.. and the mdix is not working correctly which is why the switch or manually setting port speed does.

Ethernet port dead on Powerbook firewire

ethernet port dead on my Powerbook Firewire 400MHZ G3 1GB RAM 40GB HARD DRIVE DVD-ROM
I tried Open Firmware Reset and PRAM RESET AND WOULD I NEED TO GET A NEW LOGIC BOARD.
Joshua Lich
The port stopped working for 2 months and i have no AHT DISKS OR PROPER IMAGES TO DO SO

Hi, and Welcome to the Forums..
Ok, since you already did a PRAM reset and that didn't resolve the problem.. there is ONE LAST step before we can say it is or could be the logic board.. Do a PMU reset. This is a hard reset where you would have to do the following:
A full (PMU) reset of the Pismo (Apple calls it a 'PowerBook (FireWire)') follows: If the computer is on, turn it off. Press and release the reset button located on the rear panel of the computer between the external video and modem ports. Wait 5 seconds. Press the Power button to restart the computer.
If and only if you do this and the problem is not resolved, either you will need the Apple Hardware Test which came packaged with the Pismo or you will need MacTest Pro also called: Apple Service Diagnostic to do further diagnostic checking on the Pismo's ethernet port.
Try the PMU reset above and report back.. Try to then plug in an ethernet cable and see if u can get any response from it. If not, I would suggest getting the AHT or MTP from someone.. Actually, if you email me I might be able to further assist as I DO have the tools to make your Pismo work again, hopefullly assuming its not a logic board issue.
Romko

Ethernet port dead !!??

Hello
I get a router with ethernet connection and ADSL network
After a storm my router crashed but my computer was closed before
When I connect Ethernet cable to the new router : no signal, nada, rien!!!
The cable is good, apparently the router is ok
System profiler says OK for infos
Techtool Pro says OK for test
In the Network Utility infos, I see 2 ethernet interfaces which have both speed=0 and for the link :
ethernet (fw0)= inactive
ethernet (en0)= no signal
Can you explain me the problem and eventually repairing process
Thanks very much
Michel

Hi, Michael -
Welcome to Apple's Discussions.
Some thoughts -
The cable is good...
How do you know? Since you have a new router, it would appear the old one got fried during the storm. If that was the case, any cable connected to the router should be suspect. A visual examination of a cable is often insufficient.
Your G4, like many Mac models, has a peculiarity - if the Mac does not detect the presence of a live device attached to the ethernet port during startup, it will disable the ethernet bus.
The solution - make sure the router is on, warmed up, and connected to the Mac before booting the Mac.
Your G4 400MHz model, unless it is a Gigabit Ethernet model, does not have an auto-sensing ethernet port. If it is not a GE model, that means that the ethernet cable between the Mac and the router should be a Patch type cable, and not a Crossover type.

My Cable Company says my Ethernet Card is Dead

Hi, after a lightning storm my High Speed Internet connection stopped working. The Cable company says my Ethernet Card is dead. But my understanding of my G4 Power Mac architecture is that it has built in 10BaseT support and there is no separate card. If true, might I still have a burned out driver for the Ethernet plug on the back of the computer? Alternately, might lack of Ethernet be caused by corrupted software which could be fixed by re-intalling?
Power Mac G4 Mac OS 9.2.x

Hi, after a lightning storm my High Speed Internet
connection stopped working. The Cable company says my
Ethernet Card is dead. But my understanding of my G4
Power Mac architecture is that it has built in
10BaseT support and there is no separate card. If
true, might I still have a burned out driver for the
Ethernet plug on the back of the computer?
Alternately, might lack of Ethernet be caused by
corrupted software which could be fixed by
re-intalling?
Power Mac
G4 Mac OS 9.2.x
If you dont already have one, get a utility like macTCPing.
Are you also using a router, or are you direct connected to the cable modem?
Are your modem lights flashing slow (1/sec) or fast?
at 1 per second or less, then the modem is not talking to the cable company.
Are you getting a connection light on the modem indicating a valid signal from the Mac?
Reset your modem. (Remove from power, wait a few minutes, reconnect) There may also be a reset button on it.
ping 127.0.0.1
If that succeeds
you have passed local loopback.
check your IP configuration.
ping your own IP address.
if it works, then your ethernet port is probably OK.
if it fails, release and renew your ip address, and try again.
if that works,
ping the modem or your gateway address
if this fails, then reset the modem and try again.
if it fails, the modem is likely the problem
If it works
ping any web site.
if it works, you are set.
if it fails, then ping the name servers for your ISP.
if those fail, then there is an issue with the ISP and its NS, which is beyond your control.
They are hard to find, but there were a couple of companys that made PCI ethernet cards for Mac.

2 ethernet connection error

I am installing a new WRT54G on my computer. Followed all the instructions on disk for the connections for computer to my Surfboard cable modem to the router. When it tries to read the router, it doesn't read it. What happens is I lose my internet connection. The error pops up that I have 2 ethernet connections open. This is my first and only ethernet that i know of. What's the problem?

Your router should work when set to its factory default settings.
To reset your router to factory defaults, use the following procedure:
1) Power down all computers, the router, and the modem, and unplug them from the wall.
2) Disconnect all wires from the router.
3) Power up the router and allow it to fully boot (1-2 minutes).
4) Press and hold the reset button for 30 seconds, then release it, then let the router reset and reboot (2-3 minutes).
5) Power down the router.
6) Connect one computer by wire to port 1 on the router (NOT to the internet port).
7) Power up the router and allow it to fully boot (1-2 minutes).
8) Power up the computer (if the computer has a wireless card, make sure it is off).
9) Try to ping the router. To do this, click the "Start" button > All Programs > Accessories > Command Prompt. A black DOS box will appear. Enter the following: "ping 192.168.1.1" (no quotes), and hit the Enter key. You will see 3 or 4 lines that start either with "Reply from ... " or "Request timed out." If you see "Reply from ...", your computer has found your router.
10) Open your browser and point it to 192.168.1.1. This will take you to your router's login page. Leave the user name blank, and in the password field, enter "admin" (with no quotes). This will take you to your router setup page. Note the version number of your firmware (usually listed near upper right corner of screen). Exit your browser.
If you get this far without problems, power down the computer and router. Using an ethernet cable, wire the ethernet port on the modem to the Internet port on the router. Leave the computer wired to LAN port 1 on the router. Power up the modem and allow it to fully boot (1-5 minutes). Power up the router and allow it to fully boot (1-2 minutes). Power up your computer. Test your Internet connection. It should work.
If you cannot get "Reply from ..." in step 9 above, your router is dead.
If you get a reply in step 9, but cannot complete step 10, then either your router is dead or the firmware is corrupt. In this case, use the Linksys tftp.exe program to try to reload your router with the latest firmware. After reloading the firmware, repeat the above procedure starting with step 1.
If you need additional help, please state your ISP, the make and model of your modem, your router's firmware version, and the results of steps 9 and 10. Also, if you get any error messages, copy them exactly and report back.
Please let me know how things turn out for you.
Message Edited by toomanydonuts on 12-29-2007 03:25 AM

Ethernet connections don't work

Ever since a big thunderstorm here the ethernet connection on my Mini has not worked. The wireless works fine. The Ethernet gives the message "No IP Address" in the Network Preferences sidebar, and "Unknown Sate: The status of your network connection cannot be determined" under Status. I've done all the usual fixes: deleted the preference files, reset PRAM, even reinstalled the operating system. I've tried different wires and tried plugging into different ports on the router. Ethernet connections work just fine with a number of other macs plugged into the same router. I was sure it must have been a hardward problem, so I bought the Kensington mini usb hub with ethernet. I installed it, and get the same results with that ethernet adapter.
Anyone have any ideas?
I'm on Snow Leopard 10.6.8.
Thanks!

Is this a new AC model?
How old is the Netgear gigabit switch? Unfortunately gigabit has had a bad bunch of capacitors in their switches and after a couple of years they can also play up.
Sometimes the ports on the TC seem to not negotiate properly.
if a port is dead.. definitely take it back.
I would also buy a new gigabit switch.. as your ethernet problems are a little too continuous after 3 different TC.
I know it might work fine with other devices. But some things just are not compatible.
I would use a crossover cable with modem to TC.. and TC to switch. Just because the TC has some question mark over how well it is handling port swapping from normal to crossover automatically. It is old fashioned but has helped a number of people to get the TC working ethernet wise.

We have an airport extreme wifi in house, but also want to set up a hardwired ethernet connection for gaming and streaming of netflix. The computer only sees one or the other not both at same time.

We have a new iMac 2.9ghz and are running an airport extreme set up in house with several express entenders. The problem is that our son is streaming netflix and doing on line gaming and hogging all the band width. Time Warner tech suggested a hard wired ethernet connection to computer base sattion next to computer so that it can have direct conenction to internet. After much fishing of wire the connection worked great, but the wifi connection for the house is gone. I unplugged the ethernet connection and everything is fine. I read the articles about adjusting network preferences, but the issue seems to be in the extreme not in the computer. the connection goes from cable modem to extreme, from extreme to house and to hard wired conenction to other computer. Do we need a splitter before the extreme?

No. Something else is going on.
Your son may be hogging all the bandwidth but your wireless network should never simply disappear. Moreover, if your son isn't doing anything the available bandwidth for other devices should remain unaffected.
I suspect that something is miswired, and from what you describe I suspect that link is between the Extreme and the "other computer".
The way to accomplish what you propose is
Modem > Ethernet cable to Extreme's WAN port
Extreme's LAN ports > wired Ethernet devices.
There should be nothing but an Ethernet cable linking an Extreme LAN port and any other wired device. If you run out of available LAN ports on the Extreme, you need to by an "Ethernet switch" - they are not expensive, but don't call it a "splitter" or you will only confuse yourself. The switch would be connected to one of the Extreme's LAN ports, and you would connect additional devices to it. You can also use one of your Expresses for that purpose, assuming it is the current generation model with two Ethernet ports.

How do I use my ethernet connection for printing on my LAN and use my Wifi on a different router and ISP to connect to the internet?

I'm in a small office, and I have to use my ethernet connection to connect to the networked copier to be able to print, but connection to which I hooked my Time Capsule is literally 20x faster when connecting to the internet.
How can I tell the computer to use the ethernet connection to print, while everything else should go through wifi?
I have been manually going back and forth changing the order in Network Preferences between ethernet and Wifi, but I'm know there must be an easier way. Thanks for your help!

A packet going to Apple is not local. It is going to 17.149.160.49 -- So it is sent to the topmost working connection to be Routed and sent to the Internet.
A packet going to a local computer or other device that is on the same subnet (has an IP address very close to the topmost IP Address of your computer) gets sent out that port as well, but is sent directly to that computer on the local subnet, since no Routing [changing of Addresses} is needed.
A packet going to a local computer or Printer or Network Attached Storage device that is not on the topmost subnet, but is on a secondary subnet such as the second network connection would be sent directly to that computer, since no Routing is needed.
I do not understand why two Routers have the same IP Address if they are not cross-connected. That makes everything very difficult when it should be simple.

Ethernet Connection (port?) Dead

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