Summary One of the easy and most accurate ways to test for optimum MTU is to do a simple DO S P ing test. You will simply send out ping requests and progressively lower your packet size until the packet no longer needs to be fragmented. Although this simple test is accurate for testing end points, users may find that a lower MTU may be better for their particular circumstances. Important Note : MTU must be 1492 (or lower) when using PPPoE connectivity. MTU (Maximum Transfer Unit) Network MTU (bytes) ------------------------------------------------- 16 Mbps Token Ring 17914 4 Mbps Token Ring 4464 FDDI 4352 Ethernet 1500 IEEE 802.3/802.2 1492 PPPoE (WAN Miniport) 1480 X.25 576 Proper Value 1404 How do I find the proper MTU size on my router? To find the proper MTU Size, you'll have to do a special ping of the
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