MTU Issues

Question

Level 1

0 points

MTU Issues

Hi,
I just got my new iPod touch 4G. I was frustrated with App Store and Facetime timing out on my wi-fi network (both home & office). I saw that apple.com won't open in safari(whereas other sites could). I now know that it is due MTU settings. I cannot find an option to change that in the iPod, b'cause without that I cannot activate Facetime nor download apps directly in my ipod.

Help!

Mac OS X (10.6.4), PC : Windows 7 x64

Posted on Oct 7, 2010 12:34 AM

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Answer 1

Sooner Al

Level 2

275 points

Oct 7, 2010 4:07 AM in response to adityas

Besides your home and work/office wireless networks can you connect to Facebook and/or use Safari on any other networks, ie. like at a public hot spot at a restaurant, library, bar, etc or at a friend or family members home network?

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Answer 2

Sooner Al

Level 2

275 points

Oct 7, 2010 4:30 AM in response to Sooner Al

I forgot to add that if you can connect and use Facebook or Safari on any other networks besides you home and office/work networks then it comes down to an issue with those and not your iPod Touch device.

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Answer 3

lllaass

Level 10

210,411 points

Oct 7, 2010 4:47 AM in response to adityas

You might want to change the DNS server vice the default one that is assigned by your internet provider since some users have reported better connectivity using it. See the following for how to do it:
http://code.google.com/speed/public-dns/

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Answer 4

adityas Author

Level 1

0 points

Oct 7, 2010 5:47 AM in response to Sooner Al

I can connect to FB and other sites properly on my Home & Office Wi-fi. Some sites like apple,techcrunch etc.. don't open. I assume that Facetime and app store connect to an apple web address, hence the relation. I had this problem on my laptop and after changing the MTU to 1430, everything worked fine.

Btw, I forgot to add that I already tried Google DNS and OpenDNS.

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Answer 5

luvlabs

Level 4

3,620 points

Oct 7, 2010 6:08 AM in response to adityas

Messing with the MTU setting is your likely source of your problems. Generally, everything is set to run with the factory default setting on your router. Assuming you have a brand name router, reset your router to factory defaults and see if that corrects your problem.

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Answer 6

adityas Author

Level 1

0 points

Oct 7, 2010 6:23 AM in response to luvlabs

MTU value was changed on the laptop and not the router. In the router settings, the default value is "0" (zero) which takes the best suitable MTU by itself.

I guess there is no way to change MTU on an iPod, in that case.

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Answer 7

Sooner Al

Level 2

275 points

Oct 7, 2010 7:09 AM in response to adityas

Geneally, at least here in the US, the MTU setting for a cable broadband system is 1500 and for a DSL broadband system 1492. I would try manually setting the MTU on your home router to match what your broadband ISP specifies to see if that fixes your issues. Reboot the router after making the change.Contact them for further help...

You should also set the MTU on any of your laptop/desktop clients back to their defaults after doing this. Reboot each after making any changes.

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Answer 8

adityas Author

Level 1

0 points

Oct 7, 2010 8:05 AM in response to Sooner Al

Yes Sir 🙂 That's the exact value that DSL Broadband here suggest. No affect on iPod's browsing though.

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