Lose static IP address

[lqll]

Hello

My environment is i.MX6Q sabreSD ,AR8031 phy,and OS is android 4.4.2.We use local network and we don't use wifi.We use RJ45 to connect a router.

When power on ,we give a static IP address to our board,.

but after several times of pluging/unpluging RJ45,the static IP address is changed to another.

Then we continue to plug/unplug sereral times,the IP address lost.

And I got this log from Android.

01-01 11:26:28.440: D/Ethernet(2614): Interface eth0 link up

01-01 11:26:30.840: D/ConnectivityService(2614): ConnectivityChange for ETHERNET: CONNECTED/CONNECTED

01-01 11:26:30.850: E/ConnectivityService(2614): Unexpected mtu value: android.net.EthernetDataTracker@41ccbbc0

01-01 11:26:30.860: D/Nat464Xlat(2614): requiresClat: netType=9, hasIPv4Address=true

01-01 11:26:33.870: D/Tethering(2614): MasterInitialState.processMessage what=3

01-01 11:26:33.870: D/CaptivePortalTracker(2614): NoActiveNetworkState{ when=0 what=1 obj=NetworkInfo: type: ETHERNET[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: 12:25:30:3a:85:ae, roaming: false, failover: false, isAvailable: true, isConnectedToProvisioningNetwork: false target=com.android.internal.util.StateMachine$SmHandler }

01-01 11:26:33.870: D/CaptivePortalTracker(2614): NoActiveNetworkState not a wifi connectivity change, ignore

01-01 11:27:00.440: D/Ethernet(2614): Interface eth0 link down

01-01 11:27:00.640: D/CommandListener(2232): Clearing all IP addresses on eth0

01-01 11:27:00.650: D/Nat464Xlat(2614): requiresClat: netType=9, hasIPv4Address=false

01-01 11:27:00.650: D/ConnectivityService(2614): ConnectivityChange for ETHERNET: DISCONNECTED/DISCONNECTED

01-01 11:27:00.650: D/ConnectivityService(2614): tryFailover: set mActiveDefaultNetwork=-1, prevNetType=9

01-01 11:27:00.660: D/ConnectivityService(2614): Attempting to switch to mobile

01-01 11:27:00.660: D/ConnectivityService(2614): Attempting to switch to wifi

01-01 11:27:00.660: D/ConnectivityService(2614): Attempting to switch to BLUETOOTH_TETHER

01-01 11:27:00.660: D/Nat464Xlat(2614): requiresClat: netType=9, hasIPv4Address=false

01-01 11:27:03.670: D/Tethering(2614): MasterInitialState.processMessage what=3

01-01 11:27:03.670: D/CaptivePortalTracker(2614): NoActiveNetworkState{ when=0 what=1 obj=NetworkInfo: type: ETHERNET[], state: DISCONNECTED/DISCONNECTED, reason: (unspecified), extra: 12:25:30:3a:85:ae, roaming: false, failover: false, isAvailable: false, isConnectedToProvisioningNetwork: false target=com.android.internal.util.StateMachine$SmHandler }

01-01 11:27:03.670: D/CaptivePortalTracker(2614): NoActiveNetworkState not a wifi connectivity change, ignore

01-01 11:27:04.440: D/Ethernet(2614): Interface eth0 link up

01-01 11:27:06.840: D/ConnectivityService(2614): ConnectivityChange for ETHERNET: CONNECTED/CONNECTED

01-01 11:27:06.850: E/ConnectivityService(2614): Unexpected mtu value: android.net.EthernetDataTracker@41ccbbc0

01-01 11:27:06.860: D/Nat464Xlat(2614): requiresClat: netType=9, hasIPv4Address=true

01-01 11:27:09.870: D/CaptivePortalTracker(2614): NoActiveNetworkState{ when=0 what=1 obj=NetworkInfo: type: ETHERNET[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: 12:25:30:3a:85:ae, roaming: false, failover: false, isAvailable: true, isConnectedToProvisioningNetwork: false target=com.android.internal.util.StateMachine$SmHandler }

01-01 11:27:09.870: D/CaptivePortalTracker(2614): NoActiveNetworkState not a wifi connectivity change, ignore

01-01 11:27:09.870: D/Tethering(2614): MasterInitialState.processMessage what=3

01-01 11:27:15.290: D/dalvikvm(3120): GC_FOR_ALLOC freed 512K, 18% free 2780K/3372K, paused 12ms, total 12ms

[lqll · Accepted solution]

use dhcpcd like below can solve this problem

dhcpcd -S ip_address=10.0.0.135 -S rounters=10.0.0.1 -S subnet_mask=255.255.255 eth0

[igorpadykov]

Hi lkl

one can look at uboot parameters

http://www.denx.de/wiki/view/DULG/LinuxKernelArgs

http://serverfault.com/questions/445296/is-there-a-linux-kernel-boot-parameter-to-configure-an-ipv6-...

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[lqll]

Hi igor

Thanks for your reply.

My problem is no relation to uboot.No matter what IP address setted in uboot,I will change IP address in kernel, and this is my command:

ifconfig eth0 10.0.0.135 netmask 255.255.255.0

But after I plug and unplug RJ45 many times,My static IP address auto change to 10.0.0.32,then I continue to plug and unplug RJ45 many times,the IP address is gone.

During this test,I didn't reboot board or reset IP address,and didn't run any APP.