Strange IP addresses on iMX8MP with Ubuntu Desktop

khang_letruong · ‎07-14-2022

Hi Community,

I am using the Ubuntu based Desktop (BSP 5.10.72-2.2.0) on iMX8M Plus, but the IP addresses that the Ethernet interfaces obtain are weird :

eth0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC>  mtu 1500
        inet 169.254.83.180  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 fe80::204:9fff:fe06:c9f8  prefixlen 64  scopeid 0x20<link>
        ether 00:04:9f:06:c9:f8  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 49  bytes 8556 (8.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC>  mtu 1500
        inet 169.254.186.180  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 fe80::204:9fff:fe06:c9f9  prefixlen 64  scopeid 0x20<link>
        ether 00:04:9f:06:c9:f9  txqueuelen 1000  (Ethernet)
        RX packets 4  bytes 536 (536.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 55  bytes 10210 (10.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 52

or

eth1: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC>  mtu 1500
        inet 169.254.186.180  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 fe80::204:9fff:fe06:c9f9  prefixlen 64  scopeid 0x20<link>
        ether 00:04:9f:06:c9:f9  txqueuelen 1000  (Ethernet)
        RX packets 4  bytes 536 (536.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 55  bytes 10210 (10.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 52

Meanwhile, the gateway/router only attributes 192.168.1.x.

Does anyone observe same issue ?

Best Regards,
K

Bio_TICFSL · ‎07-19-2022

Hello khang,

For some reason it's getting that ip, do the hardware connector is connected to another network? it is weird if you have not connected to internet.

Regards

khang_letruong · ‎07-19-2022

Hi @Bio_TICFSL ,

With the same Ethernet connection, my laptop has valid LAN address.

I also configured so that the router attributed a static IP addresses for the MACs of iMX8MP-EVK, but it still got weird IP addresses :

Meanwhile, it worked well when I connected the EVK into my laptop with DHCP server installed, expected IP address was attributed.