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by lunarg on May 29th 2013, at 12:36

Important for PPPoE connections on a Dell Sonicwall: with the current firmwares, the MTU is not automatically lowered to 1492 when using PPPoE as your WAN interface type. By default, it remains on 1500, so you need to manually adjust it to 1492.

This can be done by going in to the interface properties → Advanced, where you'll find a field to set the MTU.

 
 
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