[U-Boot] Weird listing/behaviour of serverip in uboot

[Ajay Garg]

Hi All.

When we stop auto-booting and printenv, a serverip is listed.
However, when trying to ftp a kernel-image, it shows serverip is not set.

#####################################################################
=> printenv
baudrate=115200
bootcmd=run load_img; run load_dtb; booti 0x48080000 - 0x48000000
bootdelay=3
ethact=ravb
ethaddr=2E:09:0A:01:A0:6D
fdt_high=0xffffffffffffffff
fileaddr=7a000000
filesize=f0d200
initrd_high=0xffffffffffffffff
ipaddr=192.168.0.2
load_dtb=tftpboot 0x48000000 hidden
load_img=tftpboot 0x48080000 Image
load_ker=ext4load mmc 0:1 0x48080000 /boot/Image
loadimg=tdtbftpboot 048000000 hidden
serverip=192.168.56.1
stderr=serial
stdin=serial
stdout=serial
ver=U-Boot 2015.04 (Mar 28 2018 - 16:00:07)

Environment size: 587/131068 bytes
=> setenv bootargs
=>  tftp 0x7a000000 Image
ravb:0 is connected to ravb.  Reconnecting to ravb
ravb Waiting for PHY auto negotiation to complete..... done
ravb: 1000Base/Full
*** ERROR: `serverip' not set
#####################################################################




If I then indeed set a serverip, two copies of serverip are listed .. !!

#####################################################################
=> setenv serverip 192.168.0.1
=> saveenv
Saving Environment to MMC...
Writing to MMC(1)... done
=> printenv
baudrate=115200
bootcmd=run load_img; run load_dtb; booti 0x48080000 - 0x48000000
bootdelay=3
ethact=ravb
ethaddr=2E:09:0A:01:A0:6D
fdt_high=0xffffffffffffffff
fileaddr=7a000000
filesize=f0d200
initrd_high=0xffffffffffffffff
ipaddr=192.168.0.2
load_dtb=tftpboot 0x48000000 hidden
load_img=tftpboot 0x48080000 Image
load_ker=ext4load mmc 0:1 0x48080000 /boot/Image
loadimg=tdtbftpboot 048000000 hidden
serverip=192.168.56.1
serverip=192.168.0.1
stderr=serial
stdin=serial
stdout=serial
ver=U-Boot 2015.04 (Mar 28 2018 - 16:00:07)

Environment size: 610/131068 bytes
#####################################################################


In summary, whatever I do, I am unable to clear the entry
serverip=192.168.56.1 (already tried editenv, still did not work).

Anybody else faced a similar issue? Or there is no option but to go
the build-uboot -> flash -> debug route?
(Wanting to avoid it, as currently the uboot has been shipped with the
device directly, so don't want to change too many things).


Thanks and Regards,
Ajay