TMDSICE3359: Lost network config when cable is disconnected

mehdi boukili

Part Number: TMDSICE3359

Hello,

I have a problem. I use linux for develop and last sdk.

When in set a ip adress with ifconfig eth0 for example (ifconfig eth0 192.168.1.12) and I disconnect ethernet cable the ip adress is lost.

I must set again.

I test with static adress in /etc/network/interface but Don't work better. With static adress I have to force ifdown and ifup for re-activate ip.

For my appli i need than network config stay set.

When I set prp or hsr I Don't have the problem. ifconfig prp0 for example stay set after cable disconnect.

over 4 years ago

0 Nick Saulnier over 4 years ago

TI__Guru** 100740 points

Hello Mehdi,

Do you need a known IP address? (e.g., set a static IP address?) Or does your use case require getting your address from somewhere else, like a DHCP server?

Regards,

Nick

0 mehdi boukili over 4 years ago in reply to Nick Saulnier

Intellectual 280 points

Hi Nick,

I don't use server DHCP. I use static address. DHCP is disable, on my network each equipment is setted manually.

When I set IP address with for example ifconfig eth0 192.168.1.2

eth0 Link encap:Ethernet HWaddr C4:F3:12:F8:AD:83

          inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::c6f3:12ff:fef8:ad83/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:46 errors:0 dropped:43 overruns:0 frame:0
          TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2769 (2.7 KiB) TX bytes:10578 (10.3 KiB)

I disconnect and connect ethernet cable. ifconfig eth0 give :

eth0      Link encap:Ethernet HWaddr C4:F3:12:F8:AD:83
          inet6 addr: fe80::c6f3:12ff:fef8:ad83/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:160 errors:0 dropped:149 overruns:0 frame:0
          TX packets:128 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:9633 (9.4 KiB) TX bytes:22453 (21.9 KiB)

I lost ip address.

Regards,

Mehdi

0 Nick Saulnier over 4 years ago in reply to mehdi boukili

TI__Guru** 100740 points

Hello Mehdi,

There are several ways to set a static IP address. The first options that come to mind:

using systemD:

See Schuyler's answer in post Static IP address configuration.

In uboot command line:

I use the following commands to set the static IP address on my EVM's NFS setup. You could probably do something like this to set your static IP (look specifically at ip_method and ipaddr):

setenv serverip 192.168.1.100
setenv rootpath /nfs/linkName
setenv bootfile zImage
setenv ip_method manual
setenv ipaddr 192.168.1.140 (whatever you want the board's static IP address to be)
setenv nfs_bootfile 'nfs ${loadaddr} ${serverip}:${rootpath}${bootdir}/${bootfile}'
setenv nfs_fdtfile 'nfs ${fdtaddr} ${serverip}:${rootpath}${bootdir}/${fdtfile}'
setenv netargs 'setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=${ipaddr}:::::eth0'
setenv nfsopts 'nolock,nfsvers=3'
setenv bootcmd 'setenv autoload no; run nfs_bootfile; run findfdt; run nfs_fdtfile; run netargs; bootz ${loadaddr} - ${fdtaddr}'
note: removed dhcp from default bootcmd

then saveenv

Regards,

Nick

0 mehdi boukili over 4 years ago in reply to Nick Saulnier

Intellectual 280 points

I Nick,

I have no problem for set static ip address.

My problem is when I disconnect ethernet cable the config network is lost and i must set again.

Regards,

Mehdi

0 Nick Saulnier over 4 years ago in reply to mehdi boukili

TI__Guru** 100740 points

Mehdi,

Both of the methods I mentioned should give you a persistent static IP address. (i.e., the IP address will remain even if you lose network connectivity). Please give one of them a try.

Regards,

Nick

0 mehdi boukili over 4 years ago in reply to Nick Saulnier

Intellectual 280 points

I Nick,

I don't work.

I test with U-BOOT, I modified this env var :

static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off

I have modified for :

set static_ip ${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::on

set ipaddr 192.168.1.10

saveenv

When I reboot, the ip adresse is Always not configured (eth0 and eth1).

I test with systemd but i don't understand if i must modified :

/lib/systemd/system/systemd-networkd.service (comment #ExecStart=/lib/systemd/systemd-networkd and add ExecStart= ExecStart=/sbin/ifup eth1) or

/etc/systemd/network/01-eth-static.network. or

/etc/network/interface or all

Thanks for help

0 Nick Saulnier over 4 years ago in reply to mehdi boukili

TI__Guru** 100740 points

Hello mehdi,

UBOOT

I am not going to have time to run experiments on this for a while, so you will need to try out different combinations yourself. One obvious issue is that you are not setting ip_method like in my example. Please take another look at my template and run some more experiments.

SYSTEMD

Please try to follow Schuyler's steps exactly and see if they work. e.g., modify /etc/systemd/network/01-eth-static.network

Regards,

Nick

0 mehdi boukili over 4 years ago in reply to Nick Saulnier

Intellectual 280 points

Hello Nick,

I have an issu.

UBOOT :
Now all is ok.

setenv ip_method manual
setenv ipaddr 192.168.1.10
saveenv

When I disconnect and connect the Ethernet câble the IP address of eth0 stay set.

SYSTEMD (without ip_method and ipaddr in UBOOT)

In my case, i modifie the file : /etc/systemd/network/10-eth-static.network

[Match]
Name=eth0

KernelCommandLine=!root=/dev/nfs

[Network]
Address=192.168.1.10
Broadcast=192.168.1.255
Netmask=255.255.255.0
Gateway=192.168.1.1

After i have reload the file with systemd.

systemctl restart systemd-networkd

When I disconnect and connect the Ethernet câble the IP address of eth0 stay set.

Thanks for your help.

Regards,

Mehdi

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TMDSICE3359: Lost network config when cable is disconnected