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Old 11-27-2005, 12:12 AM   #1
Registered: Sep 2005
Location: So. Calif. USA
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Question Tweek-Test Reports Incorrect MTU

I'm attempting to fine tune my i-net connection so I tested my settings using the Tweek Test on The test reported that my MTU=1428 & Rwin=130712. I have the MTU set to 1500 for the router and system, yet for some reason it defaults to 1428[??]. If anything, I would think the lowest MTU would be 1492 when running ADSL.
The speed test revealed nominal thoughput and 0 dropped packets, so I don't believe it's a connection issue.

Any ideas...?
Old 11-27-2005, 10:22 AM   #2
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There is an overhead for pppoa connections that use some bits for their protocol, reducing your 1500 to something lower.

If you're having a fragmentation problem, reduce your network MTU to match.


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