Ethernet port sometimes fails

I have a new router from O2, my new ISP, and while I can connect my Powerbook (15" G4) wirelessly, I cannot connect through the ethernet port. Network Diagnostics says that the ethernet cable is not connected to the Powerbook, which is incorrect as it is properly connected. The router shows no ethernet connection, which is consistent with the problem.
But, if I connect the router by ethernet to my Time Capsule and then connect the Powerbook to the Time Capsule with the ethernet cable, it works fine.
Also, if I connect the Powerbook by ethernet through my Devolo network from the router, it works fine again.
So there is clearly an incompatibility between the Powerbook and the new router which is somehow fixed by being washed through the Time Capsule or Devolo.
I have also while traveling had a problem connecting to the internet through the ethernet while my son's Windows laptop has worked fine.
All my ethernet connections are set to automatic.
I do not know the router manufacturer as it is only branded O2.
O2 are unable to suggest an answer. Has anyone here any ideas?
Thanks.

Yes, it is yellow - how did you guess?
Crossover cables are supposed to be yellow, though I've seen a few that weren't.
See the bottom of this page to see how they are wired differently inside...
http://www.incentre.net/incentre/frame/ethernet.html
At one time, to connect two Ethernet computers, you had to have a crossover cable, so the in & out signals wouldn't be butting heads, then Ethernet Ports got intelligent and could automatically switch the lines internally, yet the modern ones can get confused by it already being crossed when it's trying to cross them internally.

Similar Messages

Dead Ethernet port ATV, will Apple USB connector work?

My ethernet port on my ATV died. I have made sure the cable and switch are okay (by connecting to another device). I have done a factory restore since this port worked until a couple of weeks ago.
Will the Apple USB ethernet adapter and plug this into the ATV to get a wired connection (is the driver in the ATV 2.0 driver library)?
Trying to connect to wireless isn't working on a secure network (tried WPA-PSK, WPA2-PSK and WEP (hex and ascii). ATV sees the network but cannot connect. Using Buffalo Airstation WZR-HP-G300NH. Wireless worked prior to factory restore using WPA2-PSK (was at latest ATV version).

Sorry but no. The USB port (without hacking the OS) serves no user-accessible purpose. If the Ethernet port has failed and your Apple TV is out of warranty, you'll have to try and get wireless working. Perhaps if you start a new topic with that issue, someone here can help you get that sorted.
Regards.

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

How can I get on the internet with my newly purchased used G5 Power Mac if my ethernet port failed?

We just bought our son a used G5 Power Mac, but when we got it home and tried to hook it up to the internet, no luck. We changed ethernet calbes, tried plugging directly into wall cable (by-passing router), even tried to do manual config, but no luck. I took it to the Genius Bar today and they said the ethernet plug was broken, and they did not have anything for a "vintage" machine like this.
The Genius Bar tech told me to buy a USB Network Adaptor, however no one (Best Buy, Radio Shack, even searched the internet) seems to have them for Mac. What can I do to get this puppy connected to the internet and how much would it cost? Did we get screwed?
Here is the seriel # + info that the seller gave us:
Seriel # G8******QPM
Mac OS X 10.5.8 (9L31a)
< S/N Edited By Host >
The Powermac G5 Dual Core 2.3 is powered by a "dual core" 2 GHz PowerPC 970MP (G5) processor with dual optimized AltiVec "Velocity Engine" vector processing units (one per core), four double-precision FPUs (two per core) and a 1 GHz frontside system bus. It 's configured with 4 GB of DDR SDRAM, a 160 GB (7200 RPM) Serial ATA hard drive, a 16X dual-layer "SuperDrive"
Connectivity includes USB 2.0, FireWire "400" and "800", Two DVI port, optical digital audio in/out, two independent Gigabit Ethernet ports. All of the "multiple core" equipped Power Macintosh G5 models have three open PCI-Express (PCIe) expansion slots. The Power Macintosh G5 Dual Core 2ghs uses an easy-to-upgrade "anodized aluminum alloy" case with a removable side panel for easy access to internal components. Likewise, it is divided into four different thermal zones with nine computer-controlled fans for optimum cooling.

Sorry, the 2ndlink should be...
http://eshop.macsales.com/item/NewerTech/MXP2802NU2C/
Fully Mac OS X supported with with on-screen
menu set-up and full user manual.
http://eshop.macsales.com/item/Asus/USBN10/
OS Support Mac 10.4/10.5/10.6
I don't have those exact models, but have seen others here use them.

Bad Ethernet Ports on T61 Laptops

We have 175 T61p laptops and have had multiple problems from bad drivers corrupting hard drives, bad drivers causing lockups, bad video drivers causing issues with dual screens and bad bios causing lockup of PC's on Docking stations. All of which Lenovo support said they never had any reports of but then months later they have a fix ready for general release. Oh, what ever happened to honesty! So here is the latest issue.
Have you experienced a bad ethernet port on your T61 laptop. We have found that around 20 laptops (11.4% failure rate) that within a year the physical ethernet port on the laptop stops working. Many times it will work for a while but if you so much as touch the cable it looses the connection. It seems that the problem is that the second pin from the right fails and no longer "pops" back up to the correct position. Sometimes the port will work if you push the cable firmly into the port but if you move the laptop or touch the cable it will become disconnected. The same cables work fine in other laptops and switches.
Of course (as with all the other cases) Lenovo has told us that no one else has ever reported the problems and our users who get new laptops every two years have suddently started putting phone cables into their laptops (when was the last time anyone used a phone cable, our phones don't even use them anymore!)
Have you had to have your ethernet port replaced? Do you have a bad ethernet port?
Grab a flashlight and look at your ethernet port. Is one of the pins lower then the others?
If so please contact me on this post. I am trying to work through this problem with Lenovo but they will not honor their substandard machines!
Thank you!

I don't the machine type matters. The drivers and the ports are the same.
We use nVidia Discrete Graphics and we have had a couple of those get corrupted - fixed by an uninstall and reinstall - but not at a higher rate than the Dell PCs we're waiting to come off lease.
We also have about 30 R61i's which are almost the same with Intel graphics and they have been pretty stable, too.
The biggest issue so far was the ThinkPad wireless card driver on the T400s cause blue screens when trying to change your Windows password but that is a known issue and going back to an earlier wireless card driver solved that.
The pins look fine, too.
What are they doing there to bend those up?
ThinkPad T61 15 Widescreen with nVidia Quadro graphics 6459CTO
Windows 7 Enterprise and Windows XP Pro

I had a failure of a dsl modem which inturn destroyed my ethernet port of non isight imac G5. In attempt to solve the problem I did a clean install of leopard 10.5.4. I am unable to upate to 10.6,.7 or .8 without freezing system network preferences

Dsl modem failure caused malfunction of ethernet port. In attempt to solve problem I did a clean instillation of Leopard 10.5.4 and then update to 10.5.5 with access to internet through apple usb to ethernet adapter. If I attempt to update software to 10.5.6, .7 or .8 it freezes my network system preferences and computer will no longer shut down. The network connection assistant also no longer sees a connection to the internet throught the usb/ethernet adapter. I have checked they systerm Tech tool deluxe which shows no problems and also used hard drive utility on instillation disk which found no problems. Permissions were also checked as well and no problems noted. Any thoughts as I really like my imac G5.

Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
If all the above fails, then it appears to be time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
http://docs.info.apple.com/article.html?artnum=107120
Just be sure to select Preserve Users & Settings.

No internet access via ethernet port

Hi, have been using my emac via ethernet cable to router, for many months with NO problem accessing internet and others cabled to same router also having no problem and I have used my Pwr Mac wtih no problem and have never had to make any specific settings to either to access the net via the router which gets its wifi signal from elsewhere. With system preferences > network > ethernet open I can see the the router is being recognized cause it appears or dissappears as soon as I plug or unlug the ethernet cable. I open "Activity Monitor" and occasionally, very briefly, there will be data incoming( green spikes ) or outgoing( red spikes ). HD verified OK, ran disk permnissions and scripts. Have not yet run Apple or other( Micro-mat ) hardware testing programs tho I will later. Does anyone know if there is a PLIST file that can get corrupted that would affect ethernet port functioning properly? My guess it is hardware but since I can see the router is recognized makes me wonder about corrupt file ergo a system error or possibly inloaded some file that caused conflict. I also booted from my external drive and tried accessing from the cloned OS system and still did not work. The cloned system is the original has never been updated, nor has any of the applications in clone, so, if it was "system" problem the clone should have worked. However, I had cloned user ergo newest documents, library etc, so that would be the only possible source of conflicts when booted from clone system....Thx Ran

Ping test should be interesting.
Start by pinging router address. Should be able to ping building router if you can figure out it's address.
Could you go wireless to building net? You might buy a usb dongle.
USB dongle
Introducting RokIt, a new wireless USB adapter that is compatible with Mac OS 10.3, 10.4, and 10.5 Leopard.
http://rokland.com/store/productinfo.php?productsid=319
Newer Technology MAXPower 802.11n/g/b USB Adapter. The easiest way to add Wireless Connectivity to ANY computer! 2 Year Warranty.
http://eshop.macsales.com/item/Newer%20Technology/MXP802NU2C/
There are usb to ethernet cable.
You could try another browser.
*MAC Address*
Every ethernet port has a unique MAC Address. A router can block on a MAC Address. That is why I suggest you check out your router.
Note MAC is not Mac. MAC is all upper case.
definition: http://en.wikipedia.org/wiki/Mac_address
*Ethernet port hardware*
I'd say this was some kind of strange hardware problem.
*Dns problem?*
It has symptoms of a DNS problem. The little traffic is a symptom of the problem. You said all the numbers were the same, however.
Verify DNS
apple > system preferences > network
Double click on network connection you are using.
Pick the TCP/IP tab.
Verify that you have a DNS Server. If you do not, look on your windows machine and see what the net address is. You can also pick using DHCF and still enter you DNS server address.
You can use
harddrive > applications > utilities > network utility
to diagnose the situation.
You can ping google.com. Result:
Ping has started ...
PING google.com (64.233.167.99): 56 data bytes
64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=215.362 ms
64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=279.597 ms
64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=189.747 ms
64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=250.657 ms
64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=183.232 ms
64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=243.753 ms
64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=173.108 ms
64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=230.239 ms
64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=180.639 ms
64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=232.177 ms
--- google.com ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max/stddev = 173.108/217.851/279.597/33.615 ms
If that does work, try pinging 64.233.167.99 Result:
Ping has started ...
PING 64.233.167.99 (64.233.167.99): 56 data bytes
64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=189.655 ms
64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=213.471 ms
64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=257.873 ms
64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=172.745 ms
64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=226.723 ms
64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=171.883 ms
64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=260.308 ms
64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=172.963 ms
64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=198.840 ms
64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=181.215 ms
--- 64.233.167.99 ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max/stddev = 171.883/204.568/260.308/32.247 ms
If pinging 17.254.3.183 works but pinging Google.com doesn't. You have a bad DNS Server address.
BDAqua suggests in a post.
You can use OpenDNS for looking up web addresses.
Put these numbers in Network>TCP/IP>DNS Servers for a try...
208.67.222.222
208.67.220.220
I think they now pretend you need to join to use, but you don't.
https://www.opendns.com/homenetwork/start/device/apple-osx-tiger
(Please note that you do not need to a joint Open DNS to use it.)
http://discussions.apple.com/message.jspa?messageID=5908432#5908432
Google provides free dns lookup too. There numbers are:
8.8.8.8
8.8.4.4
Robert
=======================================================
I suggest that you try pinging Google.com.
Macintosh-HD -> Applications -> Utilities -> Terminal
mac $ ping -c4 google.com
PING google.com (64.233.187.99): 56 data bytes
64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=177.617 ms
64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=251.899 ms
64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=169.291 ms
64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=250.119 ms
--- google.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 169.291/212.232/251.899/38.894 ms
mac $ ping -c4 64.233.187.99
PING 64.233.187.99 (64.233.187.99): 56 data bytes
64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=176.723 ms
64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=247.889 ms
64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=176.890 ms
64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=244.623 ms
--- 64.233.187.99 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 176.723/211.531/247.889/34.744 ms
mac $
Analysis: If you cannot ping Goolge.com but you can ping 64.233.187.99, then you need to enter you dns address. For some reason Mac OS X sometimes doesn't set the dns. You can set it manually.
apple > system preferences > network
tcp/ip tab and enter address of dns servers
example 162.33.160.100
You will need to use a different number.
PS.
You are a little short on stating results. You state what you did, but I have to guess the result.
Did: X
Result: Y
Did:
1) Power Book's ethernet cable plugged into router port 5. Working to yahoo.com.
2) Unplugged power book's ethernet cable from router
3) Plugged eMac's ethernet cable into port 5.
Result: eMac using Firefox was not able to access yahoo.com
Robert

How to specify one ethernet port for network home directories (other for normal filesharing)?

So I'm trying to get Home Directories up and running on a 10.6.8 Xserve (waiting until I get my NFS sharepoints migrated to a Linux server [for other reasons] before moving up to 10.7 Server). But posting here since that will be happening in the next few weeks, and it might be applicable now (so I can at least get that resolved ahead of time).
I have a different DNS entry for each ethernet port: server.office.domain.com at 192.168.0.11 for the first, and homes.services.internal at 192.168.0.10 for the second. DNS lookups for both resolve correctly (as does the reverse lookup).
If I use the Server Admin to pick a sharepoint as an automount for Home Directories, everything is fine, but it picks the server.office.domain.com hostname. Picking that works just fine, but that is also the connection that feeds the filesharing. I'd prefer to split that home directory traffic out onto the second ethernet port. So I tried just duplicating the initial connection (since it can't be edited directly in Workgroup Manager) and changing the hostname to the internal one, but I get an error when attempting to log in (the client login screen gives a very helpful "Couldn't login because of an error" error message) and don't see anything in the server logs.
The client machine shows the following line:
Code:
10/20/12 5:27:42.688 PM authorizationhost: ERROR | -[HomeDirMounter mountNetworkHomeWithURL:attributes:dirPath:username:] |
PremountHomeDirectoryWithAuthentication( url=afp://homes.services.internal/Users,
homedir=/Network/Servers/homes.services.internal/Volumes/HomeDirectories/Users/ user123, name=user123 ) returned 45
(added line breaks so it didn't extend off the page)
So it looks like this is failing because the automount isn't in place, but I'm not sure how to work that out either (i.e. how do I add that making sure it uses the internal hostname?).
Any suggestions on getting this to work?
I realize one solution is just to LACP the two ports, but that is a different ball of wax (I may do that later if I get a 4 port ethernet card and performance limitations demand it).

A possible solution might be this.
On ADSLBOX and CABLEBOX configure different subnets for the LAN, e.g.
ADSLBOX: 192.168.1.0/24
CABLEBOX: 192.168.2.0/24
The MEDIABOX gets these static IPs:
ADSL-LAN: 192.168.1.2
CABLE-LAN: 192.168.2.2
On the MEDIABOX, configure the two network interfaces using two routing tables.
The ADSL-LAN routing table
ip route add 192.168.1.0/24 dev eth0 src 192.168.1.2 table 1
ip route add default via 192.168.1.1 table 1
The CABLE-LAN routing table
ip route add 192.168.2.0/24 dev eth1 src 192.168.2.2 table 2
ip route add default via 192.168.2.1 table 2
The main routing table
ip route add 192.168.1.0/24 dev eth0 src 192.168.1.2
ip route add 192.168.2.0/24 dev eth1 src 192.168.2.2
# use the CABLE-LAN gateway as default, so general internet traffic from MEDIABOX runs over CABLEBOX
ip route add default via 192.168.2.1
define the lookup rules
ip rule add from 192.168.1.2 table 1
ip rule add from 192.168.2.2 table 2
To test the setup:
ip route show
ip route show table 1
ip route show table 2
I don't know how to persist something like this in ArchLinux using netctl. Might require to write a special systemd unit for it. Above is a working example from a RedHat box at my company.
Last edited by teekay (2013-12-04 07:42:22)

We traded our home internet service for a Sprint Hot Spot. The hot spot does not have an ethernet port to connect through. Can we connect our time capsule to the wireless hot spot?

Hello, we switched our home internet service from an ethernet modem to a wireless hot spot.
Do you know if there is a way to connect our time capsule to the hot spot?
Everything I read only suggests connecting through an ethernet cable. I'm hoping there is a way to do this.
Any help would be appreciated!
Thanks!!!

No you can't join a wireless hotspot with a Time Capsule directly via it's 'join' option (tried and failed - well to be exact it kinda works but the Time Capsule's ethernet ports no longer work).
What you can do is buy an airport express and use it's 'join' option to connect to the iPhone's hotspot. Then you connect the airport express via ethernet to the time capsule (in bridge-mode).
You can then connect your computers to the time capsule via ethernet or use it's wireless function to set up wireless network (with a different name to that of the hotspot) that your wifi stuff can connect to.
Thingi

Built-In Ethernet Port Doesn't Show Up In The Network Preference Pane

My ethernet port no longer shows up in the Network preferences pane under Network Status. The status Airport and the Internal Modem are still displayed though. Plugging in an ethernet cable causes my machine to crash; sometimes I get a message that I need to hold down the power button to reboot, and other times command line-like text is displayed on top of whatever was on screen.
The only change I've made to my system since last using a wired connection was installing Security Update 2006-001 on March 1st and OS X Update 10.4.5 on February 14th. After running the 10.4.5 updater, my machine initially refused to reboot. On the first attempt, it played the start up chime, but the screen remained black. The second time, the Apple logo appeared, but the spinning pinwheel never did. The third attempt was successful and my system appeared to be functioning normally.
How do I get my ethernet port to work again?

Does "Built-in Ethernet" show up as a choice in the 'Show:" popup? If so, is it configured as you would expect? For instance, if "TCP/IP" is set to use DHCP, do you have an IP address, subnet mask, etc.? There is an "off" setting for TCP/IP; make sure that hasn't been selected somehow.
There is also an "Assist Me" button that will let you launch the diagnostics app. Does this also crash the Mac? If not, what are the results of its tests?
Also, you may want to do a permissions repair with Disk Utility if you haven't done this since applying the updates.
If you still get crashes, there may be a conflict with a log-in item, particularly if you have any third party ones. (Check that in the "Accounts" pref.) One way to diagnose things like that is by creating a new test account & logging into it. If the problems go away, you can assume a user cache, .plist, or login item is the problem.
If none of this turns up anything, you may need to reinstall the OS. Short of that, you can try downloading the 10.4.5 combo update & running it. It replaces more components than the "delta" update so it just might do the trick. Besides, if you end up having to reinstall the OS, having the combo version handy will save you the time of downloading & installing any incremental updates to get back to 10.4.5.
As always, backup all important files before applying any updates.
Good luck!

Problem with ethernet port

So I have a wierd problem.
Sometimes the ethernet port is working, sometimes not.
I've tested the ethernet cable and it works perfect with other computerS.
I've tested my macbook pro with other ethernet cables and the problem still occurs.
I've tested the ethernet plug (in the wall) and it works pefect with other computerS.
So only last potential problem : the ethernet plug / card IN my macbook pro.
It is a 2.8 Ghz Intel Core i7 with 8 Gb of 1067 Mhz DDR3 RAM, and OS X 10.7.4.
The problem is just random... sometime it works, sometime it doesn't... sometimes it works, and stop working... sometimes it works for days without problems... sometimes it doesn't work for days, with nothing to do.
Can anyone help? I don't think I'm on the warranty anymore... so before I go drop my MBP at an Apple Store, I want to make sure I've tryed everything.
Especially for the price I paid for this MBP, can't believe I'm hustling with such a basic feature......
THANKS FOR THE HELP!!!

I've used the reset chache solution with mixed success. I finally tripped over something that actually works every time. The "secret" seems to be getting the apply button active when you are on the "location" where the ethernet connection is configured. Here is what I did.
move the ethernet connection configuration to another "location" within network preferences. I called mine Home Wired.
When the cable disconnected situation occurs, switch to the location that has wireless and enable wireless. Now turn it back off.
Switch to the wired location and highlight the wired configuration and click apply. It goes through the steps of acquiring an IP and then you are connected.
Easy peezy

W500: Dead Ethernet Port

Today my ethernet port stopped working. While Linux can see it (I'm running a brand new install of Linux Mint 14), and it appears to attempt to connect, I cannot acquire an IP address and connect to any network. I've verified that the ethernet cable works just fine, and the ethernet does not work either with a live CD or in Windows (I had beed trying to set up a dual boot, but give up and went Linux-only when I couldn't get Windows 7 to connect to the LAN, erroniously thinking it was a driver issue). What can I do? The wireless on my college campus is absolutely terrible; it's likley going to take three hours just to get my fresh Linux install up to date. I don't have the money for a new computer at this time.

It looks alright. It was going into an infinite loop of trying (and failing) to get an IP address. Ironically it started working again when I got back to my room. I wonder what it is about the network in the applied CS labs that my laptop hates, since the same cable/port on the wall would work fine for other computers.

Looking for an Access Point with 2 Ethernet ports

Hi,
I am looking for an AP with two ethernet ports. Is there any model of Cisco is available with 2 ethernet ports?
Regards,
Noman

pros:
If an access swich/switch port failed then AP still forward traffic through other switch once power restored through other port.
when PoE failed on its connected switch, it may still work via other port.
Having two ethernet port on AP may require to talk to different switches/stack to achieve AP port redundancy through lag or stateful switch over when cable/switch/AP port failure.
if one physical port become bad on AP, it can be still used with other.
(However, AP/physical port failure can be takencare at RF level using self healing.)
cons:
require additional switch and its config maintanece
currently, AP doesn't require 2 physical port for data transfer perspective.
Require x2 PoE ports.
Additional port increases the cost on AP.
it is possible cisco may make it in future.

Ethernet port is erratic

When I try plugging in an ethernet cable to my ethernet port, it generally doesn't work. Sometimes I can move it around a little while simultaneously pressing refresh on my browser, and it will work... but this isn't very often. This was the case a few months ago, but lately I can't get it to work at all.
Is this something AppleCare will cover?

The way you describe the problem, pressing the browser refresh would have nothing to do with fixing it or not, and yes, AppleCare would cover a faulty port.
Resetting your PMU will return your hardware settings to default values, including NVRAM.
http://docs.info.apple.com/article.html?artnum=14449
Good Luck,
Joe

Connect WiFi to one subnet & the Ethernet port to a different subnet? (OJ Pro 8600)

Hello all,
I have an OfficeJet Pro 8600, which has both WiFi and an Ethernet port.
I have two routers at home: one for a fibre boradband line for business use and another for an ADSL line which the family use.
The fibre router has a 172.17.17.x subnet and the family router has a 172.17.18.x subnet. I would like to connect the printer wirless to the family router via WiFi and ALSO to the business router via an Ethernet cable. If I do the above;
Should I be able to print from both networks?
Is there a risk of the printer "Bridging" the two subnets in any way? (I like to keep businenss / family traffic seperate)
Any advice greatly apprecaited.
Al.
PS: I use a NetGear ProSafe Dual WAN router to sit across the fibre line & the ADSL line (it's configured to fail-over to ADSL in the even the fibre fails). Whilst the business & home networks are on seperate subnets; I do have the option to set-up static routing between them (only for the specific protocols & ports that the printer needs to work). Would this be a better idea than connecting the printer to two different networks?

Hi,
There was a discussion on the following link:
http://h30434.www3.hp.com/t5/Printer-Networking-and-Wireless/Printer-Setup-2-Networks-1-Wireless-AIO...
Regards.
BH
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Ethernet port sometimes fails

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