TQMa62xx - YOCTO Linux BSP documentation

In U-Boot end0 is configured as default interface. The IP configuration can be done statically or by a DHCP server in the network.

IP configuration via DHCP

For a configuration via a DHCP server, use the dhcp command in U-Boot.

Static IP configuration For a static IP configuration the following, U-Boot environment variables must be set:

setenv ipaddr <ipaddr> 
(e.g.: setenv ipaddr 192.168.100.111)
setenv netmask <netmask> 
(e.g.: setenv netmask 255.255.255.0)

Both Ethernet interfaces are activated and configured by systemd-networkd. The configuration files for the interfaces are located in /lib/systemd/network/ these configuration files can be altered to customize the default interface configuration. A documentation of the configuration files can be found here.

For a temporary static configuration the ip command can be used, below some useful ip commands are listed:

Activate a specific interface
e.g. end0

ip link set end0 up

Disable a specific interace
e.g. end0

ip link set end0 down

Show ip address for a specific interface
e.g. end0

ip addr show end0

Show statistic for a specific interface
e.g. end0

 
ip -s link show end0 

Set ip address for a specific interface
e.g. end0

ip addr add 192.168.1.100/24 dev end0

Show statistic of all interfaces

ip -s link

Set default gateway for a specific interfaces
e.g. set gateway ip 192.168.1.1 for end0

ip route add default via 192.168.1.1 dev end0

If a DHCP server is available in the network environment the ip configuration can be received from it. To do so execute the udhcpc command, by default end0 is used.
To configure another interface via dhcp the parameter -i followed by the interface name e.g. end1 must be given.
e.g. end1

udhcpc -i end1