Hi Oliver, Thanks for your reply, Please find my response inline. Thanks, Rajesh Dasari. On Mon, Jan 13, 2020 at 7:35 PM Oliver Neukum <oneukum@xxxxxxxx> wrote: > > Am Donnerstag, den 26.12.2019, 15:01 +0530 schrieb RAJESH DASARI: > > Could someone please help, why the usb0 is down on Device A side and > > it there is any known issue or is this expected behaviour? > > Hi, > > the kernel cannot just set devices running. Does it work if you up > the device (with "ip" or "ifconfig")? Rajesh : if i make ifconfig usb0 up on device A side, device is coming up and RUNNING bit is set, Your device on side A has no > IP. It cannot work. Rajesh : If i assign the ip address to the usb0 interface then also interface is coming up and RUNNING bit is set. We need to determine whether this is a kernel > issue or your setup in user space. Rajesh : If i don't run ifconfig usb0 up or if i don't set the ip address it is running bit is not set. Is it the standard behaviour. Could you please tell me how to find out it is a user space issue or kernel issue. > > HTH > Oliver >