Arp table modified by time capsule?!?!?

Hi,
I have the following strange behaviour on my network and no idea what could be wrong:
First the description of my network:
     Class C 192.168.2.0 with several machines connected to LAN and WLAN. I run a DNS and DHCP server.
     One of the devices is an Apple TV wih IP 192.168.2.4 (static address, connection via WLAN). The device which makes the trouble
     is a time capsule - which also has an static address (192.168.2.7 via LAN, WLAN is disabled).
     As long as the time capsule is offline, the route to the apple tv is fine. So sending pings to the apple tv behave as expected. After switching
      the time capsule on, the arp entry for the apple tv is changed to the mac address of the time capsule.
     This also happens when I switch on my second time capsule. In this case the second time capsule is giving its MAC address to the
    apple tv.
     I solved the problem by entering a permanent arp entry for the apple tv.
     But still I have no clue what is going on. Any ideas?

Yes, I have made several router restarts. What I found out today was, that if the apple tv is in sleep mode, its
IP address is bound to the MAC address of the time capsule. After a wakeup the own MAC address is
restored. Attached I have the result of a
ping atv
I think it is nomal, that a device is offline, but why does a different device "hijack" it's IP address?

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Time Capsule and Netgear Powerline

I have a 2TB Time capsule and need to extend my network (wired) through HomePlugs. I have had the Netgear Powerline recommended but have noted in the blurb that they are 'not Mac compatible'.
Will they work with my TC and is it simply just a case of plugging them in and they work or is there anything else I need to do settings wise on the TC?
If these will not work can anyone recommend otheres that do and also walk me through the settings I will need to change 9in very simple steps as I am a bit thick ).
Thanks in advance for any help.

Everything works. Follow directions for extending your wireless network at:
http://support.apple.com/kb/HT4259
Notes:
I first connected the Time Capsule directly to the AirPort Exteme to avoid any powerline networking issues. This allowed both the time capsule and airport extreme to show up in the AirPort Utility program.
Ensure that in the AirPort Extreme's wireless settings, "Allow this network to be extended" is enabled/checked before you modify the Time Capsule's settings; the "allow... extended" checkbox might not be visible if you are not directly connected as a client to the AirPort Extreme (it is not visible after setup when you are a client of the time capsule extender).
The Time Capsule network setup is easiest if you follow the dialogs instead of doing it manually.
I now have cable modem->ABEX->Netgear HomePlug-> Netgear XAV1004 switch-> Time Capsule->extended wireless network->laptop. The powerline adapter signal is running from a new house addition built in 1999 through a sub-panel circuit breaker to a main circuit breaker out through 1940s-era wiring, and everything works perfectly, including Time Machine backups from machines on both sides of the powerline adapters.
@LaPastenague: I haven't detected any ports blocked by my Netgear powerline adapter, nor could I find any port blocking topics via an internet search. I have never installed any of the Netgear management software, so my powerline adapters are not running any encryption... maybe encryption comms cause the issue you raised? I really doubt the Netgear PowerLine adapters block any host-specific ports because the adapters are working at the physical and data-link layers which are below the port assignments in the transport layer of the OSI model.

The item can't be moved because AirPort Time Capsule can't be modified

have just set up my new airport time capsule done a time machine back up but can not add any files to it to share when i try i get the following message
"The item can’t be moved because AirPort Time Capsule can’t be modified"
how do i change this
many thanks

pooldoc58 wrote:
have just set up my new airport time capsule done a time machine back up but can not add any files to it to share when i try i get the following message
"The item can’t be moved because AirPort Time Capsule can’t be modified"
how do i change this
many thanks
How are you trying to add files??
You cannot add them to the TM backup?
TM owns the sparsebundle and you should not add files to any sparsebundle.. do not even attempt to.
You can create a new directory in the Time Capsule and copy files to that.. as long as you have turned on file sharing and give correct access permissions.
Mixing data and backups does have consequences though.
See Q3 here.
http://pondini.org/TM/Time_Capsule.html

Time Capsule Can't Be Modified

I recently decided to stop using Time Machine to do all my backups because there didn't seem to be a way to see everything a folder has ever had (if I wanted to see all my music at once, for instance).
So, I decided to stop Time Machine and start to manually copy folders over to my TC but I am getting the error message that it "can't be modified." I have changed my share settings to no one being able to access the disk, and at the top of the screen I am clearly logged in as myself and not a guest so I should have full access. Anyone know what I could be missing? Thanks!

rhutchie wrote:
Hi, and welcome to the forums.
I recently decided to stop using Time Machine to do all my backups because there didn't seem to be a way to see everything a folder has ever had (if I wanted to see all my music at once, for instance).
I'm not sure what you mean by that. The "Star Wars" display shows a "snapshot" of the way your entire Mac looked at the time of any backup.
So, I decided to stop Time Machine and start to manually copy folders over to my TC but I am getting the error message that it "can't be modified." I have changed my share settings to no one being able to access the disk, and at the top of the screen I am clearly logged in as myself and not a guest so I should have full access. Anyone know what I could be missing? Thanks!
It sounds like you're trying to copy data into your backups (ie, into the +sparse bundle+ they're in); and no, you can't do that. They have a very intricate structure that can only be modified by Time Machine.
If you want to discontinue Time Machine entirely, and erase all your backups, use +*Airport Utility.+* Select your Time Capsule, then +*Manual Set-Up,+* then Disks in the tool Bar, then the Disks tab below it, then Erase. The "Quick Erase" option will only take a moment. Then you can drag whatever you want onto it.
If you want to put other things on the TC's internal HD, in addition to your backups, see #Q3 in [Using Time Machine with a Time Capsule|http://web.me.com/pondini/TimeMachine/TimeCapsule.html] (or use the link in *User Tips* at the top of the +Time Capsule+ forum).

I just purchased Time Capsule today. I ONLY want to use it as an external drive. I do not need it for Time Machine. I can see the TC in my finder, but when I click on a file or video to drag and drop, I get message that TC can't be modified. Help please

I just purchased Time Capsule today. I ONLY want to use it as an external drive. I do not need it for Time Machine. I need to free up room on my computer. As of now, I can't even load updates. I can see the TC in my finder, but when I click on a file or video to drag and drop, I get message that TC can't be modified. Help please!

I agree with Kappy.. passing files and especially via wireless is slow as slow.
Just need to be sure your TC is the new AC model??
And the OS on the computer is Lion?
Have you completed the setup of the TC via the utility? You do still need to get internet via the TC so it has to be plugged into the main router..
Give us the full picture of the network.
Then we can help you get into it.. whether you should put your files on it is another question.

I am trying to update my time machine backup on time capsule, but time machine keeps trying to create an entirely new backup (evidenced by the 200GB backup size). How can I get time machine to modify my old backup rather than create a new one?

I am trying to update my time machine backup on time capsule, but time machine keeps trying to create an entirely new backup (evidenced by the 200GB backup size). How can I get time machine to modify my old backup rather than create a new one?

It must have found the old backup corrupt.. so you will more than likely have little choice. You can archive off the old backup if it is still useful.
You can also verify it. See A5 http://pondini.org/TM/Troubleshooting.html
He also has some info on this problem. eg C13.

Add Audit Columns to the Dimension and Fact tables (Created & modified date Time)

Hi All,
I am new to SSIS , I have to Add Audit Columns to the Dimension and Fact tables (Created & modified date Time) of the package.
Please let me know the best and easy way through which I can implement the same.
If possible suggest some real time example or link where I can find the same
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Thankx & regards, Vipin jha MCP

You can simply use ALTER TABLE ADD.. syntax to add the columns if the tables already exist.
You can generate a single script for all tables using INFORMATION_SCHEMA.TABLES view
You can make then of NOT NULL type and set the default value to GETDATE()
In addition you can also have a Audit Trail trigger for UPDATE to make sure Modified date gets updated correctly on each update if not passed explicitly.
Please Mark This As Answer if it solved your issue
Please Mark This As Helpful if it helps to solve your issue
Visakh
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Cannot modify Time Capsule

I am trying to copy files from a external usb drive connected to my iMac to my Time Capsule - get an error message that TC cannot be modified - I am connected as the main user so do not believe security an issue - my goal is to use the TC as both backup and NAS server fro my wireless network - am new to Macs so a bit confused - any help would be appreciated

It sounds like you are trying to drag files to the TC icon under the SHARED heading in the Finder. That won't work.
Click on the Time Capsule icon and a folder representing your TC disk will appear to the right
Double click that folder.....named "Data".....unless you have changed it.....and the TC disk will mount on the desktop.
You can drag/drop files to this icon, or to the open window representing the disk.

How to modify Time Capsule wireless clients?

I have a Time Capsule that I use as the router for the house. We've had a lot of computers connected to it over the years. What I am wanting to know if it is possible to remove wireless clients that are connected or previously connected. Under Finder there is an HP computer that is connected but to my knowledge there is no Windows based computer using the network. At one point there was an old HP laptop connected to it. But for the life of me I can not find anything or figure out how to remove this computer from showing up under the Finder. I am confident that the problem resides at the router because I can see that same device connected.
http://i.imgur.com/PXdR9XJ.png

Under Finder there is an HP computer that is connected but to my knowledge there is no Windows based computer using the network.
Maybe you have an HP printer that is connected either by wireless or Ethernet?
Does the HP device show up in the list of current wireless clients? If not, then the HP device is connected via Ethernet to your network.
What I am wanting to know if it is possible to remove wireless clients that are connected or previously connected.
If a wireless device is already connected to the network, the only way that you can remove it is to change the wireless network password, or set up Timed Access on that device..
Chaging the password will disconnect all connected devices, then you will have to log on again from each device that you want to connect.

Modify/delete a wifi network created in Time Capsule.

Hello, I created some wifi networks with Time Capsule. Now I want to eliminate some of them in order to keep only 2 or 3 "on air"; how can I do it? My Airport Utility is updated; v. 6.3.2

You cannot create multiple wifi networks.. you can create 2.. one for 2.4ghz and one for 5ghz. (Guest network I guess is also possible).. once you change the name of the network the previous ones no longer exist.
If you have a long list of wireless names in your computer.. delete them from your computer. They are simply history and no longer current.
Tesserax has info for deleting all the old names that are stored on your computer to fix connection after wake from sleep issues.
https://discussions.apple.com/docs/DOC-3411

I have a time capsule that has worked flawlessly for several years. I recently upgraded my iMac OS to 10.8.4 and coincidently (or not) have started having some issues with backups. When I go into time machine, it struggles to find the time capsule disk

I have to unplug my time capsule and reboot it. Is there a diagnostic routine I can run or any error detection I can look for?

You are absolutely right.. when apple changed significant features in Lion and Mountain Lion .. they introduced a bunch of issues into networking which are bugs to this day..unacknowledged.. and without much that will fix them.. other than your reboot strategy.. which is like.. well that other OS.. where continual reboots are considered normal.
Old TC may also just suffer from age.. we continually tell people they have a lifespan.. 3years is the reliable span.. after that expect anything.. sudden death.. slow decline.. continual hassles and problems. If the backups are important to you.. then it is telling you in a very clear way.. replace me.. I am no longer happily providing services promised.
Now to specifics.. we don't know what the problem is.. if we knew we could give some work around.
The problem is odd in that it doesn't affect everyone.. if it starts .. people find it starts several months in to ownership.. it is never cured.. or even curable.. something like DNS or ARP table is being lost.. but it is not either of those things.
Is there a diagnostic routine I can run or any error detection I can look for?
Nothing much shows up anywhere. Including the TC log or local logs. It simply has lost the TC disk but not internet.
So.
Some things do help.
I don't know if you have pondini's resources.. TM is a complex piece of software.. it has multiple issues.
http://pondini.org/TM/Troubleshooting.html
Look at A1 .. load the widget.
A5 .. verify the backup.
A4 .. reset TM.
All of those things can help.. look at some of the typical problems.. C12 and C17 being the most common since Lion.. and exacerbated in Mountain Lion.. not fixed.
Some suggestions.
1. Keep names short, no spaces and pure alphanumeric. See C9 http://pondini.org/TM/Troubleshooting.html
2. Do not use 7.6.3 firmware... go back to 7.6.1 or even better 7.5.2 on an old one.
Firmware downgrade is easy in new utility. Hold down the option key whilst selecting version.
3. I recommend a very short dhcp lease time.. 20min for example. In whatever device is the router .. that can help keep things up to date.. and use dhcp reservation again to see if the address info helps to keep things updated.
4. Do turn on ipv6 local link.. which you need to anyway with 6.3 utility.
http://support.apple.com/kb/TS4597
5. If you are using a desktop.. an external drive is faster.. more reliable and easier than TC for Time Machine backups..
6. Consider using CCC or another backup software.. if you want to continue to use network drive.
7. Although using 6.3 airport utility has some advantages.. it is also devoid of a lot of tools that are in v5.6 airport utility.. well worth loading into at least one computer on the network.. if you only have Mountain Lion now here is one method.
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.
For screen shots see this post.
https://discussions.apple.com/thread/4668746?tstart=0

Time capsule works as wireless router, but intermittently stops backing up because it is not recognized

So here is the scenario. I just purchased a new 2T Time Capsule about a month ago. At some point, about a week ago it stopped working correctly. A few things that I've noticed:
1. The wireless router works just fine.
2. Every once in a while (more often than not) my computer (Mac book pro) will not recognize the time capsule and it will therefore not do it's wireless backup. I can no longer use it to store data.
3. What works? Unplugging the time capsule for about 20 seconds and then reconnecting seems to fix the problem, but will then the same problem will recur spontaneously.
4. Sometimes, I'll restart my computer and that will fix the problem, but again time capsule will drop off from the shared devices.
5. Interestingly, when TC is not recognized by my mac book, the Home Sharing feature of Apple TV also is rendered non-functional.
Any ideas? is it a hardware issue? If so, is it my Mac book or my TC or both?
Thanks for your advice in advance

I have seen a few posts on this one and the issue is very likely to be the way Auto channel changes take place.. for some unknown reason, the wireless can still connect as a router but the arp address is lost in the ARP table on the computer. So open a terminal and type arp -a soon after a TC restart when TM can see it.. you will see the TC MAC address listed. Once the TC is no longer recognised again do arp -a and you will find the TC is no longer listed. It is possible to force a static listing to the ARP table, but it seems to be much easier and better to simply lock the wireless channel.
Using the airport utility go to the TC setup and open the wireless area. Airport on the top menu.. wireless on the tab under that. where it says radio channel selection change to manual.. give it a fixed channel, for 2.4ghz it is best to pick the least used channel and you will need to use some site survey software to do this.. kismet, inssider for pc is superior to most Mac utilities at the moment. There are only 3 non overlapping channels 1, 6, 11 (12,13 outside USA). Pick one. I would also give a separate name to 5ghz wireless so it doesn't switch between the two.. that means you will have to change manually if signal drops out as it does more readily on 5ghz. The locking of channels seems to help the Mac not lose the MAC address in arp..though the actual mechanism is unknown to me.

Cannot see Time Capsule for backup but internet perfect A

I've seen other posts about time capsule problems and most talk about wireless dropout and loss of internet connectivity. My situation is almost the reverse:
Full airport strength in menu bar. Full access to internet sites on at least one computer. Cannot see Time Capsule via Airport Utility or in Finder on any computer. Time Machine backups fail (marked as Delayed in menu bar item).
If I reboot (via unplugging) the Time Capsule, it shows up again in Airport Utility and backups are successful. This has happened three times now. I think the first time was prior to upgrading the firmware. The second two times were after the Time Capsule firmware upgrade. In the second two instances, it looks like the backups run for about 12-13 hours, every hour. No problems. Then, they drop out. Yesterday, it ran from 8:30 AM until 9 PM.
I've got two Macs (a Powerbook G4 and a MacBook Pro), each running latest software updates (security, 10.5.2, etc.).
Unplugging (rebooting) my Time Capsule each day is not an option. That's partly why I moved from an ancient LinkSys router that always needed to be rebooted since we lost local and internet access. Any help is much appreciated!
Cheers,
Drew

Have you set up the TC with user accounts??
Most people just use the TC password..
I have done very little with user accounts on the TC.. it seems fundamentally wrong headed to me.. If you have a domain controller with everyone using accounts to login that is fine.. and the TC would then exist in connection to the domain controller.. but it is a home device and there is no function to all that.
What will happen if you change over to standard security or even turn on the guest account I am too scared to suggest as you may not easily get connection back again.. The TC certainly displays a warning going to accounts.. I am not sure of warnings going away from accounts.
If you didn't setup the TC, do you have admin access to it??
Perhaps I am assuming too much before you tell me everything. But I may suggest things you don't want to try.. unfortunately I cannot say this will work.. the issue is widespread across the Mountain Lion TC combo and I have yet to see Apple suggest a solution or even fess up there is a problem. Daily reboots are just simply now a part of the scene for all windows and Mac users.
Is the TC the main router for the network.. 1 hour is not default lease in the TC and very few people even know how to change it.. standard is 1day. I would consider 1hr adequately short for all arp tables to be kept up to date.. the computer should be seeking new lease at 30min.. ie half lease time.
If the TC is bridged an not controlling the network.. that can contribute to the issue.
Setting a static IP on the TC if it is bridged my help.

Delete ARP table entry

I need to create a program to delete an entry in the ARP table in Windows 7 with LabVIEW or TestStand. The test that I am developing communicates with the DUT over Ethernet. Each DUT has the same IP address to start but different MAC addresses. I am noticing that there can be long delays in the test execution when trying to connect and deleting the previous entry in the ARP table seems to help. But currently I have to do this manually through the command line. The command "arp -d" requires elevated privileges. I have been having a tough time getting LabVIEW to elevate the system exec. Does anybody have an ideas? Is there any .NET access to the ARP table?
Thanks,
Paul
Solved!
Go to Solution.

I would try looking into tuning the ARP timing parameters in Windows.
We suffered from various TCP performance/connection problems some years ago and our solution was to modify the the default number of TCP sockets and timeouts (we were experiencing port exhaustion). The tweeks eliminated most of our problems, no LV/TS code changes required.
I tried to find info on ARP settings for Windows 7, but it seems that there is much less info available than ther is for XP.
The registry keywords most common for older versions of Windows were "ArpCacheLife" and "ArpCacheMinReferencedLife"
EDIT:
These settings were apparently removed in Vista. I found this on the M$ site; they may apply to later versions as well since M$ is following an RFC for ARP management...
http://support.microsoft.com/kb/949589
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Time Capsule DHCP (with Netgear DGN3500)

Hi
I have tried, inconsistently for months, to figure out the best setup for my home network.
1. I'll try to describe what I have at the moment:
i. A Netgear DGN3500 which acts as a modem (connects to adsl phone socket in wall), and a wire/less router. The netgear broadcasts a wireless network (SSID: "712 2.4GHz") and is also connected to my Time Capsule via ethernet cable. The netgear acts as a DHCP server, providing address from 192.168.3.3 - 192.168.3.9. The netgear has a static lan ip address of 192.168.3.1.
ii. My Time Capsule (connected to the internet via netgear modem via ethernet) is currently in "DHCP only" mode. The TC has a static IP address of 192.168.3.2 and provides via DHCP a range of addresses from 192.168.3.10 - 192.168.3.200. The TC also broacasts 2 wireless networks, one in 2.4GHz mode (SSID: "712 2.4GHz") and another in 5GHz mode (SSID: "712 5GHz"). Radio mode and channels are all set to "Automatic".
2. Ok. Let me explain what I've tried to achieve here.
I want to roam around my home without having to worry about wireless signal or ip addresses etc. So the idea is that I can be in my bedroom (closest to the netgear) and surf the web on my iphone/macbook pro using an ip address provided by the netgear's DHCP server, then walk into my living room (closer to the TC) and swicth to an IP address provided by the TC's DHCP server and continue surfing the web on my iphone/macbook pro without losing signal strength.
3. My problem is this:
When swicthing between routers/wlans/ip adrresses/etc. from my living room to my bedroom (ie. when swicthing between the TC and the netgear), the process is almost seamless. However, when I switch the other way around, from the netgear near my bedroom to the TC in my living room, it takes more than a few minutes for the correct IP address to be served to the iphone/macbook pro and I find that I can't connect to the internet (except via 3G on my iphone) until it sorts itself out, after clicking the "Renew DHCP lease" a hundred times, or disabling and enabling wireless on my iphone/macbook pro a hundred times. It's baffling to me why it works (quickly) in one direction but not the other.
4. What I have done, that also didn't work:
Most forum posts have suggested that the TC should simply be left in "bridge mode". I did this too. It worked (or rather didn't) in exactly the same way as I described above. The only difference, unless I'm mistaken, was that the netgear was the exclusive DHCP sever and provided the full range of IP addresses. It did indeed do this via the TC (via ethernet) as well, but also just as slowly.
Help.

I agree with Bob.. the problem is the TC is setup not in bridge not in router.. it is in fairy land.. it has to be bridge or router to work properly.. otherwise the Netgear as the primary router has no idea what IP address the device is that wirelessly connects to the TC.. and the TC cannot route the connection correctly because it isn't a router. (watch the arp table if available in the netgear or list of clients and in the TC from a computer open the advanced, log, wireless clients, in a computer, then as you roam you will see where the iphone is showing up.)
A few points.. again what Bob says about sticking with Apple products is probably true.. Apple wireless provides some details PC world doesn't.. eg country. It is also roaming which will never work as well in mixed product environment.
Are there spaces in the SSID? That is again a no no in the PC world. Even if you don't use PC's the Netgear is not designed primarily for Macs.
I would set SSID, and all the names of devices.. short.. straight alphanumeric.. no spaces.
I would also lock channels on at least one device.. two routers set to auto channel leads to chaos.. but I would lock both.. for 2.4ghz there are only three non-overlapping channels, 1, 6 and 11.
Use as much space as possible.. so 1 on the netgear and 11 on the TC.
Solution might also be to buy a Airport Extreme or Express and plug it into the netgear and turn off its wireless. Stick with Apple on Apple.. it does work better.

Arp table modified by time capsule?!?!?

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