iMac Wake on Lan issue

[rsphotocreation]

Hello, I've got troubles to set my network correctly...
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Let me explain the configuration:
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1. The router is connected to the internet, the WiFi is turned off.
2. Time Capsule is connected to the router with an ethernet cable, it's in Bridge Mode, the WiFi is set to 802.11 n only, the 5GHz is set to channel 36 and the 2.4GHz is set to channel 8.
3. Airport Express is connected to the network created from Time Capsule, it extends the network in 2.4GHz (this AirPort Express doesn't support dual bands).
4. Apple TV is connected to the network in 5GHz.
5. iPad 2 is connected to the network in 2.4GHz.
6. iMac is connected to the network in 5GHz.
7. iPhone 4S is connected to the network in 2.4GHz.
8. MacBook Pro is connected to the network in 2.4GHz.
9. The printer is connected to the network in 2.4GHz.
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The trouble is:
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- When the iMac is in sleep mode, after a few hours it dissapear from the network. So I cannot access it while on the go with my iPhone through 3G network, neither from my Macbook Pro on the same network.

Thanks in advance.

 

[meme1255]

And if you connect iMac @ 2,4GHz to Airport Express?

 

[rsphotocreation]

I didn't try that, because iMac backs up faster on Time Capsule over the 5GHz. Its transfer is about 270, and only 130 in 2,4GHz.

I have this configuration since the beggining and it worked. The problem came with an update. I don't know if it's Lion, but the problem is here too with Mountain Lion. Or the Time Capsule update.

But the MacBook Pro works fine, whether its connected on Time Capsule or AirPort Express.

 

[richard13]

I'm in the same boat as you. I could be wrong but I believe that my iMac used to Wake On LAN while using wireless in the past. I'm not sure when this became problematic for me, could have been Snow Leopard or Lion.

I had originally remedied this during Lion time frame by just not letting my iMac sleep. I also had an issue where occasionally my iMac would crash when waking. This worked and considering the small amount of power my iMac draws when idle I figured it was no big deal.

But I hate it when things don't work the way they are supposed to so I'm trying another approach. I have connected my iMac via ethernet and turned off wireless. This is less than ideal as I don't like having an extra cord coming out of my computer, but then again, I don't travel with my iMac. So far my iMac sleeps when its idle and wakes when I expect it to. For instance, when my MacBook Pro wants to access it. So, it would seem that Wake On LAN works for iMacs using ethernet, just not (or not as well) with wireless.

 

[resipsa17]

I'm having WoL issues too. Spent several hours with tech support. Only thing left to try is clean install.

If you are still having trouble, send a bug report: http://www.apple.com/feedback/macosx.html

We need to get Apple's attention on this.