How to manually configure ethernet from Busybox

[Vesta]

Hi,

Linux version 2.6.26.5, ARM Linux Kernel on embedded device.
How to manually set up Ethernet connection from BusyBox v1.10.2 rescue shell (ash)?

I mounted the main virtual file systems, then tried:

# ifconfig lo 127.0.0.1
# ifconfig eth0 hw ether 88:75:56:05:2B:24
# ifconfig eth0 192.168.15.1 netmask 255.255.255.0 broadcast 192.168.15.255
# ifconfig eth0 up
# route add -net 192.168.15.0/24 eth0
# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 88:75:56:05:2B:24
          inet addr:192.168.15.1  Bcast:192.168.15.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:22

# ping 192.168.15.100
PING 192.168.15.100 (192.168.15.100): 56 data bytes
From 192.168.15.100 icmp_seq=0 timed out
... ...

Device is also unreachable when ping it from computer.
ping 192.168.15.1
connect: Network is unreachable


Regards,