TMDSICE3359: Dynamic - Static IP ping does not work after a minute's worth delay after configuring on startup

Aditya Kumawat

Part Number: TMDSICE3359

Hi,

Problem Statement: Secure Meters is using this image/SDK to flash on our TMDSICE3359 evaluation board. Both provided by TI.

On the startup, we are configuring the board with a static IP using the network interfaces file. The static IP is in the range 10.11.3.XX.

We then ping the board using a PC that has a dynamic IP in the 172.16.10.xx range.

Let's say we are constantly pinging from the PC, but a point comes around 60 seconds after running the /etc/init.d/networking restart command where the ping stops working.

Here's the ping output:

Our Observations:

Secure Meters has noticed that in the case where the ping is working fine, the routing table contains this on the TI board:

And, in the case when the ping stops working, this is the routing table:

Something adds that extra row of default destination.

Note: The 10.11.0.1 is the gateway we are configuring using the interfaces file and 169 series IP is just there because of not getting an IP from DHCP before we configure a static IP, so these can be probably ignored for the cause of the problem.

If TI has observed this problem before and has some kind of workaround, please revert to this mail asap.

Regards,

Aditya Kumawat

Secure Meters Ltd.

over 2 years ago

+1 Nick Saulnier over 2 years ago

TI__Guru** 100980 points

Hello Aditya,

I am not clear, which image/SDK are you using?

Also, which Ethernet interface is this? (i.e., CPSW or PRU Ethernet)

I assume you are just using generic Ethernet, rather than a specific networking protocol?

Regards,

Nick

0 Aditya Kumawat over 2 years ago in reply to Nick Saulnier

Prodigy 40 points

Hi Nick,
This is the SDK we are using: https://software-dl.ti.com/processor-sdk-linux/esd/AM335X/06_03_00_106/index_FDS.html

This is a PRU ethernet interface, and yes we are using generic Ethernet on our board.

Also, please don't consider the issue as being resolved as it was a mis-click.

Regards,

Aditya

0 Nick Saulnier over 2 years ago in reply to Aditya Kumawat

TI__Guru** 100980 points

Hello Aditya,

I am sending your thread to one of my teammates to work with you further. Please ping the thread if you do not get a response within several business days.

Regards,

Nick

0 Rimika Gupta over 2 years ago in reply to Nick Saulnier

TI__Intellectual 1920 points

Hi Aditya,

Is this you setup ->

DHCP server -> PC <---- [LAN] ----->AM335x board

Kindly confirm

Thanks and Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

Can you share me your setup.

How did you assign static IP to board.

Thanks and Regards,

Rimika

0 Aditya Kumawat over 2 years ago in reply to Rimika Gupta

Prodigy 40 points

Hi Rimika,

This is a depiction of the setup.

DHCP server -> PC <---- [LAN] (server 1) -------> [Router]------> [LAN] (server 2) ----->AM335x board

I am assigning IP using the interfaces file and running the /etc/networking restart command.

We got the issue in a distribution provided by a third-party vendor image. This issue of ping stopping to work is not present in the official TI SDK now that we have tested it again.

However, there is an issue of the board not retaining static IP when the LAN cable is reconnected. I assume this might be a dhcp server issue and any input from your side will be heavily appreciated.

Regards,

Aditya

0 Rimika Gupta over 2 years ago in reply to Aditya Kumawat

TI__Intellectual 1920 points

Hi Aditya,

Here board is not connected to DHCP server, right?

Thanks and Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

I mean router is not connected to the DHCP server as well?

Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

Kindly share the steps you are following.

Which interface file are you referring to?

I am directly pinging my board via PC

Thanks and Reagrds,

Rimika

0 Aditya Kumawat over 2 years ago in reply to Rimika Gupta

Prodigy 40 points

The board is not connected to the DHCP and I am referring to the interfaces file under /etc/network/.

0 Rimika Gupta over 2 years ago in reply to Aditya Kumawat

TI__Intellectual 1920 points

Thanks for confirmation. I am working on it.

Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

Did you try the above test with latest SDK version 08.02.00.24 ?

Thanks and Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

Have you hardcoded the IP for eth ports on board?

As we know whenever a connection is dropped i.e. link goes down on restarting, it will lose it's present static IP and we need to assign a new IP for communication.

Thus, whenever you are using /etc/networking restart command, it is losing it's communication as IP is being dropped. But, if you have hardcoded the IP, it will retain it and thus connection will be reestablished again when link comes up.

Thanks and Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

I hardcoded IP on the board and it is working perfectly as expected. On hardcoding he IP, even on dropping link, the port would gain same assigned IP on coming up.

Steps to hardcode:

vi /etc/network/interfaces
Adding eth0 ip -> {192.168.0.21}
auto eth0
iface eth0 inet static
address 192.168.0.21
netmask 255.255.255.0
Restart the interface -> /etc/init.d/networking restart

Now you can ping to the hardcoded IP {192.168.0.21}.

Thanks and Regards,

Rimika

0 Rimika Gupta over 2 years ago in reply to Rimika Gupta

TI__Intellectual 1920 points

Hi Aditya,

Should I close this issue?

Thanks and Regards,

Rimika

0 Aditya Kumawat over 2 years ago in reply to Rimika Gupta

Prodigy 40 points

Hi Rimika,
You can close the issue.

Regards

0 Aditya Kumawat over 2 years ago in reply to Aditya Kumawat

Prodigy 40 points

Sorry for the late response. I couldn't get notifications on the forum.

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TMDSICE3359: Dynamic - Static IP ping does not work after a minute's worth delay after configuring on startup