i.MX Processors中的主题 Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

Yocto Setting the Default Ethernet address and disable DHCP on boot.

michaeldiamond — Wed, 04 Feb 2015 21:26:38 GMT

I have not found anything real concrete on this. In LTIB there were settings in the menuconfig to be able to set a default IP address, subnet, etc... and turn the dhcp server off. The kernel uses the UDHCPC and gives the following while booting.

IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

udhcpc (v1.22.1) started

Sending discover...

No lease, forking to background

done.

I am not sure if this can be done from the machine conf file or if I need an .bbappend file somewhere.

Thanks

Michael

Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

Yuri — Tue, 10 Feb 2015 10:13:52 GMT

The Yocto does not provide additional pseudo-graphical configuration tool, as
the menuconfig for kernel, which was used under LTIB.
Looks like the only solution is to prepare proper file (manually), that should be located
in /etc/network/interfaces of rootfs.

Template is located in

<Yocto_dir>/fsl-release-bsp/sources/poky/meta-yocto-bsp/recipes-core/init-ifupdown

Please use Linux command

$ man 5 interfaces

for more details about file “interfaces”

Have a great day,
Yuri

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Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

michaeldiamond — Wed, 11 Feb 2015 21:54:52 GMT

Thank you for this information. I was able to adjust the interfaces file and that worked. Now I just need yocto to place the modified one in my image.

Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

michaeldiamond — Wed, 18 Feb 2015 15:39:46 GMT

I was able to include the updated interfaces file in yocto by doing the following so others can do this as well. I added recipes-core in my layer and then added an init-ifupdown folder. Inside that folder I added an init-ifupdown_1.0.bbappend file that contains only;

FILESEXTRAPATHS_prepend := "${THISDIR}/init-ifupdown-1.0:"

Then I put a init-ifupdown-1.0 folder that contains my updated interfaces file for yocto to include.

This is what my interfaces file contains where I set the eth0 to static and manually set it's address.

# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface

auto lo

iface lo inet loopback

# Wireless interfaces

iface wlan0 inet dhcp

wireless_mode managed

wireless_essid any

wpa-driver wext

wpa-conf /etc/wpa_supplicant.conf

iface atml0 inet dhcp

# Wired or wireless interfaces

auto eth0

iface eth0 inet static

address 10.254.253.1

netmask 255.255.255.0

iface eth1 inet dhcp

# Ethernet/RNDIS gadget (g_ether)

# ... or on host side, usbnet and random hwaddr

iface usb0 inet static

address 192.168.7.2

netmask 255.255.255.0

network 192.168.7.0

gateway 192.168.7.1

# Bluetooth networking

iface bnep0 inet dhcp

Hope this is helpful for someone else.

Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

dariuszzawisko — Tue, 17 Mar 2015 12:18:16 GMT

This is really helpful. Thank you.

Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

sergi1 — Thu, 26 Jan 2017 10:19:06 GMT

Let me take up this question again. I have performed the steps that you indicate and the problem is when restarting the board does not assign static ip until it does not launch:

Ifdown eth0
Ifup eth0

Do you know what the problem may be?

Thank you.

Re: Yocto Setting the Default Ethernet address and disable DHCP on boot.

firex — Fri, 04 May 2018 09:26:31 GMT

i have the same behavior. i guess it do this because the actual default configuration is systemd. and init.d scripts are not executed.