Hello, I was looking for some more information about the minimum MTU setting of 552 for path MTU discovery, but couldn't find anything why it is exactly 552, and not, like one would expect, 576. So, why 552? And is there a standard? Regards, Uwe - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html