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C6300 Cannot change MTU size

careys
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C6300 Cannot change MTU size

Modem: C6300

Firmware: V2.01.26

ISP: Spectrum

 

Problem: Happens when I go into NetGear Genie (via either IE 11 or MS Edge) > Setup > WAN Setup.  When I modify the MTU Size (in bytes) and click Apply at the top of the WAN Setup screen I get:

 

Failure

------------------------------------------------------------

Invalid DMZ IP address

------------------------------------------------------------

Click OK to go back to previous screen...

 

I click OK. It goes back to WAN Setup screen. MTU Size has not saved, but is still the same value as before. Note that I did not attempt to change the Default DMZ Server... I left the box unchecked.

 

FWIW - NO BOXES on the WAN Setup screen are checked.

 

My question is: What do I have to do to save the MTU change?

 

Thank you  🙂

Model: C6300|AC1750 Cable Modem Router Docsis 3.0
Message 1 of 2

Accepted Solutions
careys
Tutor

Re: C6300 Cannot change MTU size

Solved with workaround:  I checked the box for DMZ server and faked a DMZ server IP address, along with my MTU change. It saved both. Then I unchecked the box for DMZ Server and now just have the new MTU size.

 

Oh well...

View solution in original post

Model: C6300|AC1750 Cable Modem Router Docsis 3.0
Message 2 of 2

All Replies
careys
Tutor

Re: C6300 Cannot change MTU size

Solved with workaround:  I checked the box for DMZ server and faked a DMZ server IP address, along with my MTU change. It saved both. Then I unchecked the box for DMZ Server and now just have the new MTU size.

 

Oh well...

Model: C6300|AC1750 Cable Modem Router Docsis 3.0
Message 2 of 2
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