Jumbo Frames not working unsure if bug.

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What steps will reproduce the problem?
1. Set Intel Gigabit CT Adapter to Jumbo Frames, size 9014.
2. Plug nic directly into RT-56u using Cat 6 cable.
3. Try pinging router from desktop using command ping 192.168.1.1 -l 9014 -f 

What is the expected output? What do you see instead?

Expect to see successful ping.   Instead get Packet needs to be fragmented but 
DF set.

IF I drop packet size down to 1472 in ping, ping 192.168.1.1 -l 1472 -f works.

What version of the product are you using? On what operating system?

Using Windows 7, Dos Prompt, Firmware 1.0.1.8d-p2

Please provide any additional information below.

Unsure if this is a bug or did I configure something wrong? Trying 4088 Jumbo 
Frames config in nic does not work either.

Original issue reported on code.google.com by richar...@yahoo.com on 2 Mar 2012 at 3:33

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Could find no setting for MTU.

Original comment by richar...@yahoo.com on 2 Mar 2012 at 4:24

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Switch RTL8367M support Jumbo Frames up to 16000 bytes. All Jumbo Frames will 
be relayed perfectly between LAN hosts. But router SoC RT3662 support Jumbo 
Frames up to 4K and Jumbo Frames disabled in RT3662 GMAC driver. Ping Jumbo to 
router host always failed.  

Original comment by andy.pad...@gmail.com on 2 Mar 2012 at 6:38

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Hi Andy,

Thank you for the response.   I am not that technical so please help me 
understand what you put in comment 2.

The RTL8367M supports 16K Jumbo Frames - I assume the RTL8367M is the built in 
hub for the router.    I think you are telling me that the 16K is already on?   
So I do not need to do anything?

For the RT 3662 router you are telling me it supports 4K jumbo frames - is this 
between the Router and the Internet Connection (DSL/Cable Modem) and the built 
in hub?   

Since the RT3662 4K Jumbo Frame is disabled does this mean that Jumbo frames 
will always fail or just that the ping using jumbo frame data size(s) always 
fails?

Thank you for the reply,

Best regards - Richard

Original comment by rsomazze...@gtempaccount.com on 2 Mar 2012 at 8:39

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> I assume the RTL8367M is the built in hub for the router
Yes, but this is not hub, this is switch. 16K already ON. All packets up to 16K 
will be success RX/TX between any LAN hosts, except host 192.168.1.1 - this is 
SoC RT3662 - Router with CPU/GMAC/WiFi/PCIe/USB.

Original comment by andy.pad...@gmail.com on 2 Mar 2012 at 11:56

[GoogleCodeExporter]

Original comment by andy.pad...@gmail.com on 10 Dec 2012 at 1:09

• Changed state: WontFix