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easiest way to increase eth0 MTU size for jumbo frames?

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RussellInCincinnati

Senior Member
Have enabled Jumbo Frames on the LAN/Switch Control page of my RT-AC68u. NAT acceleration is auto, with CTF enabled. Spanning Tree protocol is enabled.

When I do an ifconfig at the Merlin router linux prompt, the eth0 eth1 eth2 eth3 MTU sizes still show as
"MTU:1500"

Any suggestions as the easiest way to get jumbo frames working the rest of the way for the 4 router LAN client ethernet ports? Have enabled Jumbo Frames on my Windows 7 Intel fancy ethernet adapter driver of a Dell Optiplex 760, trying 4000 and 9000 MTU size settings.

When I do a ping -f -l 1600 router.asus.com nothing comes back, of course. Ping -f -l 1504 router.asus.com responds fine.
 

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