Wifi Constantly Dropping in Lion

Is LION an OS X 10.5.8 or later variant, as this is deemed the minimum alongside iTunes 10.6 and a USB2.0 for iOS5 system ipads

Pleasse ignore last and excuse my ignorance on last post. i dont use a Mac (pretty obvious now).

Can some one tell me what the default Time to Live TTL is set to for the lion 10.7 OS X, please? Many Thanks in advance.

http://osxdaily.com/2011/11/06/lion-wi-fi-problems-solution-mac/

to comment on the original post (WiFi constantly dropping in Lion) I would like to report that after talking with Apple 2 days ago and doing as they suggested I have not lost connection once. I was guided to simply name a location as "wireless" in my Network pref. (I am on a 2011 iMac purchased in October and using a modem from Time Warner that is probably 3 years old, I cannot describe further as I am a very "general consumer" computer person although not an idiot) Apple was very friendly and helpful and did grant me a one time exception phone call as I do not have Apple Care. I have yet to call Time Warner and request they change the router channel to 9 as Apple suggested saying I will get a more robust signal and less interference, which they believe is a part of the problem causing the connection to drop randomly. I am taking it one step at a time to better isoalte the issue.

Joseph Kriz wrote:

sgt_harris,

I agree...

We all know there is some problem with Lion and some wireless routers...

I certianly am not suggesting everyone run out and buy a new router...

Apple apparently made some changes..

Are they using newer technology now in this system that is causing problems with older wireless technology that some routers may have?

I don't know, I don't work for Apple and they aren't telling....

Maybe some of the older routers need a firmware update and those companies may be working on just that?

Something like Firewire 400 cables that won't plug into the new computers with a Firewire 800 connection...

You would either need an adapter, a new cable, or a new device that has Firewire 800...

Some people still refuse to list what wireless router they are using...

As you mention, people in the UK or other places around the world are using different devices...

As I mentioned before, I am using a 4th Generation Airport Extreme.

I have never owned any other brand of wireless router.

There are other good brands out there but it seems that Lion may not like some of them at this time.

Perhpas the question should also include what type of computer are people using? take a look at a video that shows a person having wifi problems and is not using an apple computer. This could also be a possiblity.

Carlo TD wrote:

Perhpas the question should also include what type of computer are people using? take a look at a video that shows a person having wifi problems and is not using an apple computer. This could also be a possiblity.

You're saying that tongue in cheek aren't you?.... You know that people do hack to make OSX work on non Apple, but it's very rare and *of course* things like Wi Fi don't work very well...... The people raising it here are about zero point zero percent chance of being on a non Apple.

I am not an Apple expert but since I bought a new dual band router more than two weeks ago, I haven't experienced a single WI-Fi drop. My Imac is now connected to the 5Ghz band of the router. Before my old router supported only the 2,4Ghz band, which is known to interfere with bluetooth, cordless phones and so on. So I think that the Mac is more sensitive to this kind of interferences. Now using the new band, internet speed is constant and fast.

I've been using a dual band Apple Time Capsule all along. Using 5 GHz provides no improvement. I did roll back the TC firmware to pre-Lion release and saw only a minor improvement. The TC was recently replaced by Apple under warrantee because of a bad hard drive.

Absolutely no issues with any computer or operating system other than Lion on a brand new Mac.

The only thing that has changed is Lion. Can't blame the weather.

I changed the channel. It was 'auto' and i changed it and stabiled in router's interface setup settings. It worked for me now my internet is working greatly. I hope it works for you too.

(assuming update to 10.7.2)

Delete your network connections on your mac (if you have a Firewall such as Kasp, Norton, etc also check under their Network Settings that the previous connections listed are deleted too, this ensures fresh connection information is written to protected OS File system space by your Firewall/Antivirus software and it too does not attempt to cache previously held information).

Power everything off and disconnect. Wait two minutes and reconnect. In order. Cable Access Point. (2 minutes up) then Dual Channel TC (2 minutes up) then finally Mac. Do not attempt a connection. Go into Mac service centre help and look for how to flush both the DNS (Domain Name system) and ARP (Address Resolution protocol) (used to map DNS to MAC addresses) caches. When done. Reboot. Re-establicsh your network connections from TC to Mac.

I have a theory, though I do not have a Mac system to try it on. I am interested to see the result of the flushes.

Ok. That's strange. I use a Netgear N600 dualband modem router and I have no more drops since a couple of weeks. Before I experienced drops every 20 to 30 minutes! So something has definetely changed.

I even experience now a much better performance of my Apple Tv since it is connected to the 5Ghz band of the router.

Well I am happy to report that after three days of testing I have had no disconnects, This is using saltatempo'ssuggestion found here http://rys.pixeltards.com/2011/09/04/osx-lion-wifi.html. However, I no longer automatically connect to the wireless WIFI after booting or waking up from sleep, but this is much better than being disconnected continuously - sometimes as often as 3 or 4 times a minute. Ironically, I ran Apple's "fix" for the no WIFI on wake problem before, when I had no problem connecting after waking up from sleep. Now that I have already installed that "fix" I have the problem.

Yes, your experience exactly mirrors mine. No more drops whilst using the mac but invariably no connection after waking or rebooting.

B

Sorry guys, I know this seems to be more a Mac thread than anything else but a thought occured to me. This has (on checking) also (my thought) been picked up Windows 7 machines, but is an old rogue from Vista as well. Someone in the thread mentioned about Polling - so I checked back through my notes.

In the registry of a windows machine under HKLM\SYSTEM\CurrentcontrolSet\Services\Tcpip\Parameters\Interfaces\[hex id] of your ISP connected interface, there is a DWORD value called DhcpConnForceBroadcastFlag setting.

Default is 0 or off.

However in this state any broadcasts on the regular network that are routed through switches that do not make use of the normal UNcast reply to a client, then any publically configured firewalls (most are for the internet) will not see the DHCP ACK reply. Turning this on in widows under this setting allows for the ACK to be recognised as a multicast response and since his is publically accepted the Dhcp IP issue response is seen.

Some routers will however have a setting to block multicast, though if you receive rss feeds it is a good idea to disable the Block Multicast feature.

This issue was resolved on windows back in about late 2010. I am wondering if their is a similar situation for a similar setting on the Mac. Can anyone tell me if this is so, and if so what the default is

Did anything work for you. I've tried everything I can. Tech support says to go to the store.... Thanks