Is there an "On Ethernet Connection" Command?

Hey there.
We have network drives that are mounted as part of our login scripts. When those who have laptops disconnect from our network by unpluging from ethernet, they lose those connections. Unfortunately, when coming back and reconnecting to the network via ethernet, those network shares are not remounted.
Is it at all possible to run any kind of process (AppleScript, Automator, shell, etc.) when the Mac reconnects via ethernet?
Thanks in advance.
Aam

ControlPlane - Context-sensitive system reconfiguration utility (change your network location based on where you are, mount/umount device, change default printers, start/stop applications, run scripts, etc...)
<http://www.macupdate.com/app/mac/39644/controlplane>

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2 x ethernet connections

I have just installed another ethernet card into our G5 PowerMac server which is running OSX Server 10.4 (all software updates have been installed) ... The current setup essentially boils down to:
en0 - has an external IP address that has been statically assigned by our router
en1 - has an internal IP address that has been statically assigned by our router
The problem is however, when there are two ethernet connections, our server freezes (the only way to get it out of it, is to hard restart it)...
Does anyone have any ideas of how to resolve this issue?
Thanks,
Elliot

Does anyone have any ideas of how to resolve this issue?
Not without more information.
Every single one of my servers runs with multiple (usually 3) interfaces, so it's not a fault of Mac OS X Server, per se.
Therefore the problem has to lie in the configuration.
When you say the server freezes, do you mean it no longer accepts network connections? or are you on the console (e.g. using a monitor and keyboard) and it freezes there, too?
What do the logs say? especially /var/log/system.log
If I had to hazard a guess I'd say your internal network has a higher priority and it has a router address defined (typical if you're using DHCP). Your internal network should not have any router address set (you're not routing over your local network) so the proper solution would be to change that to a static address (servers, generally, should be statically assigned, not using DHCP, although there are exceptions).
In the mean time you can reorder the network interfaces in System Preferences -> Network so that the external interface is listed first.

Dropped commands via ethernet connection

Hello,
I seem to have commands dropped whenever I use ethernet connections as opposed to GPIB or RS232. I do not know if it is due to timing but depending on the instrument the more frequent the dropped commands occur. If I highlight the execution, I see the data flow as expected and commands. I have tried placing timeouts before and after/delays in between commands, even *OPC, to make sure the operation is complete before moving on to the next command.
This question is very general for very specific pieces of instruments but I am convinced it is due to the ethernet connection and my understanding of the timing of commands.
Thanks,
Christian

Some instruments just need time to process commands before they can accept any more. The Ethernet tends to send data faster, but also has a higher latency. You could be running into this latency issue. In general, you should have waits between commands just for allowing the instrument to process it, regardless of the communication bus.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions

Is there a way to turn the wireless capabilities off on an AirPort Express? I have an AirPort Extreme as my main router and use the express to just extend it. I only really want to you use the express for hard ethernet connections

Is there a way to turn the wireless capabilities off on an AirPort Express? I have an AirPort Extreme as my main router and use the express to just extend it. I only really want to you use the express for hard ethernet connections. For whatever reason when I have my express extend my wifi at home the download speed from just the express is absolutely terrible, drops to about 1.5 mb compared to when it's on the extremes part of the network the speed goes up to 50-75mb. These terrible download speed really only affects the iPhones as my MacBook Pro usually gets the good speed no matter where it is. I don't believe there is anything wrong with my phone because if I am in the part of the house that uses just the extreme the download speeds on the iphone goes up to 50-75mb. As a note I have an AirPort Extreme on the top floor of my house (second floor) that's where my modem is located. On the first floor that's where one airport express is located. I also have another airport express in the basement that is accessed by my landlord. Any thoughts on how to fix this would be helpful.

Is there a way to turn the wireless capabilities off on an AirPort Express? I have an AirPort Extreme as my main router and use the express to just extend it. I only really want to you use the express for hard ethernet connections.
It appears that your networking goals with the AirPort Express is to use it as a wireless Ethernet bridge instead of using it to extend the wireless range of your AirPort Extreme. The latter requires that the Express Wi-Fi radios be enabled.
If you intended to use the Express as a wireless bridge, you just need to reconfigure it to "Join a wireless" network instead of "Extend a wireless network."
For whatever reason when I have my express extend my wifi at home the download speed from just the express is absolutely terrible, drops to about 1.5 mb compared to when it's on the extremes part of the network the speed goes up to 50-75mb.
In an extended network, the placement of the extending base station is critical as it can only extend the wireless network at the bandwidth at which it receives it.
Please check out the following AirPort User Tip for details on optimal base station placement.

HT3728 My Time Capsule is working fine with ethernet connection, but it is no longer working with wifi, probably because of my wrong setting; is there a way to reset wifi setting without losing backuped data? Thanks you all

y Time Capsule is working fine with ethernet connection, but it is no longer working with wifi, probably because of my wrong setting; is there a way to reset wifi setting without losing backuped data? Thanks you all

Giancarlo Messalli wrote:
1) are you sure a reset holding the reset button will not delete my data?
Absolutely sure.. There is no connection at all.. reset is only the router side of the TC.
For the hard disk to be erased you need to access the airport utility disk page.. request erase and confirm the operation.
2) I can access to time capsule by ethernet but I am not able to input the corret setting by myself
Thank you again
I am uncertain why if you have access you cannot change settings.. but that is why you reset things so any of those problems should be fixed.
Here is the Apple info on reset.
http://support.apple.com/kb/ht3728
And here is the quote from the horse's mouth so to speak.
Factory default reset: Perform this reset if you wish to repurpose the AirPort Base Station or Time Capsule and want to remove all personal profiles and settings first. This reset resets the device to its state when you first purchased it. Data stored on internal or external hard drives connected to the device will not be erased. If you choose, you may manually erase the hard drive using AirPort Utility.

HT201343 I have a Mac pro with osx ml in a Ethernet connection and a apple tv with a wireless, there is no way I can see the airplay in my Mac pro

I have a Mac pro with osx ml in a Ethernet connection and a apple tv with a wireless, there is no way I can see the airplay in my Mac pro

Mac Pros don't support Airplay. Only some post 2011 Macs do, MAc Pros aren't amongst them.
http://www.apple.com/uk/osx/specs/
You could try Airparrot software as a workaround.
AC

In the garage I have a Netgear Router. it is connected by a ethernet cable, I have a 1tb drive that I want to use there. On the drive there is only a USB port. on the Netgear there is only ethernet ports. is there an adapter that will work for that?

In the garage I have a Netgear Router. it is connected by a ethernet cable, I have a 1tb drive that I want to use there. On the drive there is only a USB port. on the Netgear there is only ethernet ports. is there an adapter that will work for that?

It's not that simple. You need a "smart" device to connect a hard drive to, like a Time Capsule, or another computer, or an Airport Extreme/Express that was made to share a drive, or some other brand router that has a USB port for sharing a drive, etc.

Is there any way to connect an ipad to a ethernet cord or connection with out using wi fi

Is there any way to connect an ipad to a ethernet cord or connect with out using wi fi? Thank you

The closest you can come, without having a 3G iPad is to have a cellular mobile hotspot like the Mifi or such device, use that to get to wifi, or to tether it to a cell phone.

I want to connect a Windows PC to an existing Airport Extreme router via ethernet connection. Is there any utility required or can I just plug into the router?

I want to connect a Windows PC to an existing Airport Extreme router via ethernet connection. Is there any utility required or can I just plug into the router? The router is already set up and working with existing iMacs.

thanks for the info. I found apple utilty software on this windows 7 PC but I guess it is not required for sharing internet on exisiting apple extreme. Am I correct that I can remove this apple software?

How do I use my iBook with a hotel's ethernet connection?

When a hotel just has an ethernet connection, I can never come up with the right configuration to access it. Does anyone have the procedure?

Plug in the ethernet.
(Turn on/log in your iBook)
Open browser
Go to a website.
It should now load.
If for some reason the obvious is not working, do this.
Open System preferences.
Click Network
Now at the top pull down the menu and select network status.
There should now be a line that says ethernet.
In that line it should say "connected, your IP address is x." If it does not say that it is connected, what does the error say?

I am trying to connect IMAC OSx 10.9.4 to Suddenlink thru ethernet connection in New Bern NC. No luck. Any hints?

I am trying to connect IMAC OSx 10.9.4 to Suddenlink thru ethernet connection in New Bern NC. No luck. Any hints?

If you bring up Safari browser, and go to www.google.com, does it give you an error?
It is possible that you are not getting DNS. From the OSX terminal can you run the following two commands
1. dig www.google.com
2. ifconfig en0
3. ifconfig en1
4. ping -c 3 www.google.com
1. Example output...
; <<>> DiG 9.8.3-P1 <<>> www.google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44161
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.google.com. IN A
;; ANSWER SECTION:
www.google.com. 92 IN A 173.194.121.18
www.google.com. 92 IN A 173.194.121.20
www.google.com. 92 IN A 173.194.121.16
www.google.com. 92 IN A 173.194.121.17
www.google.com. 92 IN A 173.194.121.19
;; Query time: 43 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Sat Sep 6 17:19:56 2014
;; MSG SIZE rcvd: 112
Example output for commands 2 and 3
ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether b8:e8:56:35:bf:e2
inet6 fe80::bae8:56ff:fe35:bfe2%en0 prefixlen 64 scopeid 0x4
inet 192.168.1.9 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=1<PERFORMNUD>
media: autoselect
status: active
ifconfig en1
en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=60<TSO4,TSO6>
ether 72:00:00:79:ee:b0
media: autoselect <full-duplex>
status: inactive
Example output of 4.
ping -c 3 www.google.com
PING www.google.com (173.194.121.18): 56 data bytes
64 bytes from 173.194.121.18: icmp_seq=0 ttl=250 time=9.049 ms
64 bytes from 173.194.121.18: icmp_seq=1 ttl=250 time=10.568 ms
64 bytes from 173.194.121.18: icmp_seq=2 ttl=250 time=9.393 ms
--- www.google.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 9.049/9.670/10.568/0.650 ms

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.

I have an older Power Mac and it does not have the ability/hardware to connect to my wireless network.It is on 2nd floor which has no ethernet connections available. How can I get connected wirelessly?

I have an older Power Mac desktop computer. I do not believe it has the hardware to connect wirelessly to my wireless network. The computer is located on the 2nd floor of my house where there are no ethernet network connections so I would have to use wireless to connect to the internet. I have a wireless LinkSys router downstairs that I use to create my wireless network. I also have a Time Capsule upstairs but without the ability to plug an ethernet network cable into it, I cannot use it to get internet access t the computer.
What hardware can I add to give me the abiity to connect the Power Mac to my wireless network?
Is there a way perhaps to link routers? IE. Can I somehow have my existing wireless router downstairs connect wirelessly with the Time Capsule upstairs that i could then plug the Power Mac into for connectivity?
Not sure what version of OS this computer is currently using but do know it does not have the newer dual Intel processors. As such I am unable to update to newer OS versions.

While uselessSABOTAGE's advice is great, in case of future issues, it would helps us in the future if you would post accurate tech specs of your model iMac.
You info states you have an older IMac PowerMac, but is also says your OS X version is OS X 10.7.2.
This is not possible. OS X 10.7.2 Lion only runs on Intel CPU Macs.
Please, go up to the Apple symbol in the upper top left of OS X main menu bar. Click the symbol. Then click About this Mac. A popup window appears that gives some basic info. Then, click the More Info button and both post your iMacs complete specs by selecting/highlighting all of the info and copy paste this into a reply to this post, editing out your iMac's serial number. Then update the info you posted in your user profile with some of this new found data for future postings.

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.

How do I reduce the MTU on my Airport Extreme Ethernet connection?

Hi there,
Is it possible to reduce the MTU on the Ethernet connection inside the Airport Extreme Base station. I was having trouble accessing some websites, but was able to fix it on a direct ethernet connection by reducting the MTU setting to below 1500. However, when I connect wirelessly ( I have a DSL modem connected to the WAN port of an Airport Extreme Base station), I still have the same problem, but there seems to be nowhere in the Admin utility where I can reduce the MTU for the connection.
Anyone know a work around for this?
Thanks
Martin
iMac G5 Mac OS X (10.4.3) Airport Extreme

Don't know if this will help, but if you use cocktail there is a place under "Network" where you can change the mtu setting for the machine you are using. I also remember seeing some info on this in the unix support group here in the forums.
PowerMac G4 MDD 2GB Ram, 1Ghz TiBook 1GB Ram Mac OS X (10.3.9)

Is there an "On Ethernet Connection" Command?

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