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mtu setting

SOLVED
Posted by
Regular Visitor
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Message 1 of 5
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Could anyone please tell me what modem mtu setting is, for docsis 3.0? And Router, 1500 or 1492 or must i do ping tests to find out so i can match computers to same and stop fragmentation or reduce it? Asked CSR tech. they didn't know what mtu was.

4 REPLIES
Posted by
Connection Expert

Message 2 of 5
38,220 Views
Solution

The correct MTU parameter for the Comcast network is 1500.




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Posted by
Contributor

Message 3 of 5
35,258 Views

 


EG wrote:

The correct MTU parameter for the Comcast network is 1500.


Using the method on this web page, I find the largest packet I can send is 1472 bytes.

 

 

Should I not set my router's MTU to 1472?

Posted by
Contributor

Message 4 of 5
35,254 Views

Never mind, I forgot about ping's 28 header bytes. So 1500 looks exactly correct.

Posted by
Connection Expert

Message 5 of 5
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