Readynas interrupting internet connection on VDSL

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NemoNL wrote:

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StephenB wrote:

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NemoNL wrote:

 

Does anyone know what could be causing this and how to resolve this?

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If the ReadyNAS MTU is set to 1500, try lowering it to 1492.

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That seemed to have helped a lot, thanks StephenB!. The connection is more stable, but still is disconnected every so often. I'm seeing a few series of disconnections last night and some now this morning. But at least it is coming back by itself.

Major improvement, but still something is not 100% ok. But at least this would be workable.

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1492 is the usual value for PPPoE, but it might need to be a bit lower still.

You can determine the value using ping - in a Windows PC you run CMD (command prompt) and then enter

ping -l 1464 -f 8.8.8.8

 If you see a message that says

Packet needs to be fragmented but DF set.

then lower the 1464 value until you find the largest value that doesn't give that error. Then add 28 to the final value, and set the MTU to that size.

Another possibility is that something else on your network might be using the default 1500.  It is possible to set the MTU on PCs (both MacOS and Windows).  But unfortunately I don't think you can manually set the MTU for Android (without rooting the phone) or iOS.  The MTU can be signaled via DHCP, so if your devices are using DHCP it might not need to be manually set.