[EVMC6678L] How to check whether JUMBO PACKET is enabled or not.

Ryuuichi machida

Hi expert,

I try to check JUMBO PACKET by using EVMC6678L and window7 PC.
I'm trying to enable JUMBO PACKET. However I could not communicate w/ EVMC6678L by using JUMBO PACKET

- 1 -
Here is my environment.

* CCS 6.0.1.00040 is used.
* MCSDK 2.1.2.6
* PDK 1.1.2.6
* NDK 2.21.2.43
* Sys/bios 6.33.6.50
* XDC 3.23.4.60

- 2 -
Here is my procedure to check JUMBO Packet

1. Build "helloworld_evmc6678l" according to "Enabling_Jumbo_packet_support_C6678.pdf"
2. I set MTU of windows 7 to 9K by for local area connection.
(I confirmed idx and MTU by using "netsh intetface ipv4 show interface" command and saw MTU was changed from 1500 to 9202.)
3. I loaded gel file (evmc6678l.gel) for core0 and loaded out file.
4. I used ping command to send JUMBO PACKET from PC to EVM and check packet by using WireShark.
   4-1. At first, I tried to send 600 byte
        (ping 192.168.2.100 -l 600)
        Then I could observe transmit worked fine.(I saw "642 echo (ping) request" and "reply" from 192.168.2.101 on wireshark)
   4-2. Second, I tried to send 2000 byte(JUMBO PACKET).
         (ping 192.168.2.100 -l 2000)
         Then I could observe transmit did NOT work fine.(I saw "2042 echo (ping) request" and "no response found" on wireshark)

- 3 -
please advice if I have to do.

(And I want attach my executed file which I used to check JUMBO PACKET. does anyone know how to attach "out" file ?)

Best Regards,
Machida

over 10 years ago

0 Ganapathi Dhandapani95 over 10 years ago

TI__Mastermind 28085 points

Hi,

Pubesh answered JUMBO PACKET related question on below e2e thread, Please take a look this thread
e2e.ti.com/.../1389795

Thanks,

0 Ryuichi Machida over 10 years ago in reply to Ganapathi Dhandapani95

TI__Expert 4555 points

Hi Ganapathi,

Thank you for pointing out site which is related my question.
However, I have already confirmed this site and it seemed that JUMBO Packet enable does NOT work correctly...
I think that there are some source code which is not defined JumboPacket enable and should be change buffer size(1500(1514) to bigger than 1500 to apply jumbo packet.).
Anyway, I will try to check code step by step...
If you have any comment about my procedure/environment, please send it me.

Thanks in advance,
Machida

0 Ryuuichi machida over 10 years ago in reply to Ryuichi Machida

Guru 12650 points

Hi Ganapathi,

As a result of confirming several site and codes, I think that besides setting of "Enabling_Jumbo_packet_support_C6678.pdf", I have to set ether driver to receive JUMBO Packet as well.
However, I'm not sure which code set receieve max in NDK/PDK. Can you point out which variable should be changed to receive Jumbo Packet in ether driver code ?

Best Regards,
machida

0 Ganapathi Dhandapani95 over 10 years ago in reply to Ryuuichi machida

TI__Mastermind 28085 points

Hi,

I'm not sure the maximum value. I will check with peripheral experts and try to answer your question.

Thanks,

0 Ryuuichi machida over 10 years ago in reply to Ganapathi Dhandapani95

Guru 12650 points

Hi Ganapathi,

Thank you for your reply. If you get information, please let me know.

On the other hands, I tried to check PDK code (I believe that ether driver(this means for Platform, it does not mean general network driver) is included this package) today.
According to my check, MTU depends on "ETH_MAX_PAYLOAD" which is defined "etherif.h" and it seems that receive buffer size is determined by using this value.
In other words, it seems when JumboPacket is enabled(defined "_INCLUDE_JUMBOFRAME_SUPPORT"), receive buffer of ether driver is set over 1500bytes...

By the way, do you know when you check whether jumboPacket is enabled by using "Enabling_Jumbo_packet_support_C6678.pdf", user should change "timeout" parameter and "MRU" parameter on Ubuntu/windows ?

Best Regards,

Machida

0 Ganapathi Dhandapani95 over 10 years ago in reply to Ryuuichi machida

TI__Mastermind 28085 points

Hi,

Keystone device Supports 9Kb jumbo packets, you can set maximum value as 9100. For more information refer below wiki link
processors.wiki.ti.com/.../KeyStone_Overview.pdf

Thanks,

0 Raja over 10 years ago in reply to Ganapathi Dhandapani95

TI__Guru* 81335 points

Hi Ryuuichi machida ,
Please help us to close this thread. Thank you.

0 Ryuuichi machida over 10 years ago in reply to Raja

Guru 12650 points

Raja,

Thank you for sending your reminder. I will close this thread.

BR,
Machida

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[EVMC6678L] How to check whether JUMBO PACKET is enabled or not.