Inconsisted largest MTU value reports issue.

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Achab
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Posts: 1
Joined: Fri Oct 19, 2018 9:39 am

Inconsisted largest MTU value reports issue.

Post by Achab »

Hello,
I keep getting inconsistent MTU value reports.

SG TCP/IP Analyzer on this pages gives me:

MTU = 1460
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput. If you are using a router, it could be limiting your MTU regardless of Registry settings.

While both ping and TCP Optimizer's MTU/Latency tool report MTU 1500.

What could be the cause/should I be worried?

Thank's for your insights,
A.
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Philip
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Joined: Sat May 08, 1999 5:00 am
Location: Jacksonville, Florida

Post by Philip »

Even though it may be set to 1500 on your computer, it is possible that some other software, or your NAT router/modem is changing it? The Analyzer shows the largest packet size that your IP advertises. I would check your router/modem and make sure that MTU/Packet size is set to 1500 and not 1460. It is not that big of a deal, in fact, many DSL connections use 1480 or 1492 MTU, but, 1500 will give you a bit less headers overhead, it is slightly better.
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