topic Re: L2 switch problem with LAN in Vybrid Processors

L2 switch problem with LAN

jeremyesquirol — Thu, 11 Jun 2015 11:48:19 GMT

Hi all,

I'm encountering a very strange issue with the L2_swtich on Vybrid, using linux 3.0, and i've the same problem on our custom board, phytec board and freescale twr board.

All my board are in static IP.

My PC is connected to the ETH0 port on board. I connect the ETH1 on a switch in my local network. This switch is connected to a router for internet access.

From my pc, i can ping all members in the local network and i can access to internet.

Here is the problem : I can't acces website ( on other things like ssh or ftp connection) in my LOCAL network.

I've a full acces on WAN, i can ping all member in LAN, but it seems like if the data's are too big (or too much datas) from the local network, the switch don't work.

I've tried with only 2 board and 1 pc connected : The pc on ETH0 and the second board on ETH1, all with static IP. I'm able to ping both board. I can access the first board embedded website, but i can't access the second...

It's like if there is a big set of data in short time, I lost the frames. Does the switch is fast enought?

I've also tried to reduce data speed to 10T (i was using Auto Negociation) but it d'ont change anything.

Any idea?

Re: L2 switch problem with LAN

karina_valencia — Mon, 15 Jun 2015 16:14:20 GMT

timesyssupport can you help here?

Re: L2 switch problem with LAN

timesyssupport — Wed, 17 Jun 2015 17:04:16 GMT

Hello Jemery,

We are investigating this issue, as Phytec has inquired about this as well. Once we have had a chance to reproduce and analyze, we will follow up.

Thank you,

Timesys Support

Re: L2 switch problem with LAN

jeremyesquirol — Thu, 18 Jun 2015 09:11:50 GMT

Hello,

Thank you, i'm waiting for your answer.

regards.

Re: L2 switch problem with LAN

karina_valencia — Mon, 22 Jun 2015 17:04:09 GMT

timesyssupport do you have an update or can let us know an estimated due date?

Re: L2 switch problem with LAN

timesyssupport — Mon, 22 Jun 2015 18:09:54 GMT

Hello Jeremy,

We are still in the process of reproducing and debugging this issue.

Thank you for your patience.

Regards,

Timesys Support

Re: L2 switch problem with LAN

karina_valencia — Mon, 29 Jun 2015 18:46:48 GMT

timesyssupport do you have an update?

Re: L2 switch problem with LAN

jeremyesquirol — Thu, 02 Jul 2015 12:13:20 GMT

Have you some news ?

Were you able to reproduce this issue?

Re: L2 switch problem with LAN

karina_valencia — Mon, 06 Jul 2015 21:50:03 GMT

Timesys Support do you have an update?

Re: L2 switch problem with LAN

timesyssupport — Tue, 07 Jul 2015 13:45:51 GMT

Hello Jeremy,

Could you share your kernel config for this issue?

In this case, CONFIG_FSL_L2_SWITCH and CONFIG_FEC cannot be enabled at the same time, only one or the other.

How are you confirming that frames are lost? If you can provide an exact procedure we can attempt to reproduce.

If you have not already, please submit a support request in the Timesys Support queue - that is accessible by logging into: http://linuxlink.timesys.com and clicking the "Support" link.

Thank you,

Timesys Support

Re: L2 switch problem with LAN

jeremyesquirol — Wed, 08 Jul 2015 10:04:13 GMT

Hello,

Here is my .config file

It's the default .config from factory

I've made a new "factory" folder, using twr_vf600-factory-installer.sh, and i used the default .config file. I remove the FEC and enable L2_Switch, and because i'm using the freescale tower_board with a twr_ser2 card, I change the PHY driver to the good one : Drivers for National Semiconductor dp83848 dp83849 PHYs

My /network/interfaces file is :

auto eth0

iface eth0 inet static

address 192.168.3.42

network 192.168.3.0

netmask 255.255.255.0

broadcast 192.168.3.255

gateway 192.168.3.25

With this config, i simply plug an ethernet cable from my pc to the TWR, and a second cable from the TWR to a 30 slot ethernet switch on my local network.

Now for test :

- ping is OK. I can ping local devices or ping www.google.fr, it works fine.

- web access : I can access website through my router. (like www.google.com, www.youtube.com ...) it works.

- Local web access : It not work! I can't load the website of my printer for example. on wireshark i can see that the first packet is received, but not the nexts.

- ssh on local device : i can't access to my local device in SSH.

- ftp : It's weir, i can acces device when there is not a lot of repertories to load. I can't if there is a lot of repertories. It's like if there is a lot of repertories to load, I lost frames and the connection is lost.

I will submit a support request on timesys website.

EDIT : I add some screenshot.

The first , "page_good.png" is the page i must load from my device (ip addr 192.168.3.62, in my LOCAL network). This device is connected to my local network, I load this page when i was NOT connected to the TWR_BOARD switch.

The second, "page_bug_switch.png", show you what I get when I try to connect to my embedded website USING the TWR_BOARD switch. My pc is connected to the freescale TWR_Board and the TWR is connted to the device. The webpage is loading continusly but i don't get it.

The "wireshark_switch_bug.png" is the wireshark capture when i'm trying to get the website through the TWR_Board switch. You can see that the TCP connection is well done. I get the first packet but after there is a problem.

Looking wireshark, i've noticed that a big amount of data in a short time don't pass through the switch.I

I don't know if it's the driver or if it's a hardware issue, but i only get this issue with the switch. And i was able to reproduce this bug using phytec board, freescale board, and with the default .config file, i simply change the FEC for L2_SWITCH in kernel.

workaround :

If someone is having this bug and need switch ability, I'm using a trick: enable "Bridge" and the "dual fec" in kernel and use "bridge-utils" software, you get a software switch. .

Re: L2 switch problem with LAN

karina_valencia — Mon, 13 Jul 2015 20:43:39 GMT

timesyssupport please continue with the follow up.

Re: L2 switch problem with LAN

timesyssupport — Tue, 14 Jul 2015 16:03:18 GMT

Hello karinavalencia and jeremyesquirol,

Thank you for providing this additional information; we will provide this to our Vybrid engineers for further review and follow up.

Thank you,

Timesys Support

Re: L2 switch problem with LAN

jeremyesquirol — Mon, 20 Jul 2015 12:07:03 GMT

I've opened a ticket in timesys support and they answer me they're working on it.
I'm waiting their update.

Re: L2 switch problem with LAN

karina_valencia — Mon, 20 Jul 2015 16:40:18 GMT

Hi Jemery, thanks for let us know.

Re: L2 switch problem with LAN

xaviergarriga — Fri, 26 Oct 2018 11:56:51 GMT

Hello,

I'm also facing a similar problem using L2 switch. Whenever I have a peak of data runing through I loose packages.

Did manage to fix it ? Do you have any update from timesys ?

Thank you in advance,

Re: L2 switch problem with LAN

jeremyesquirol — Mon, 29 Oct 2018 08:33:22 GMT

Hello,

I was using the linux 3.0.15 from Timesys. I know they release new version since I was using it but I don't know if they fix it.

On our custom board, I've disable the support for L2_SWITCH and I'm using the dual FEC with BRIDGE. It make a software switch

Re: L2 switch problem with LAN

xaviergarriga — Tue, 30 Oct 2018 07:44:14 GMT

Thank you for your prompt reply.

I wanted to avoid the software switch, however I'll give it a try.

Re: L2 switch problem with LAN

xaviergarriga — Thu, 22 Jul 2021 07:39:42 GMT

Hello,

I'm still facing same problem and could not find an answer anywhere. Has been any fix released ? Is there a way to fix it that other than using dual FEC and software switching ?

Thank you in advance,

Re: L2 switch problem with LAN

xaviergarriga — Thu, 22 Jul 2021 07:57:08 GMT

Hello,

It's been a long time however I cannot manage it this to work without dual FEC and software bridge. Did you find any fix ? Do you know if @timesyssupport applied any fix in the past ?

Thank you in advance,