ping an Moxa

I am trying to ping a Moxa using a BeagleBone Black, but I keep getting " Network is unreachable"

Here is how my ifconfig looks :

eth0 Link encap:Ethernet HWaddr d0:39:72:39:9d:18
inet6 addr: fe80::d239:72ff:fe39:9d18/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:63 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2208 (2.1 KiB) TX bytes:13265 (12.9 KiB)
Interrupt:40

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 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:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

usb0 Link encap:Ethernet HWaddr f6:db:ca:41:be:d3
inet addr:192.168.7.2 Bcast:192.168.7.3 Mask:255.255.255.252
inet6 addr: fe80::f4db:caff:fe41:bed3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1867 errors:0 dropped:0 overruns:0 frame:0
TX packets:122 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:140357 (137.0 KiB) TX bytes:28559 (27.8 KiB)

and here is how my interfaces look :

This file describes the network interfaces available on your system

and how to activate them. For more information, see interfaces(5).

The loopback network interface

auto lo
iface lo inet loopback

The primary network interface

#allow-hotplug eth0
#auto eth0
#iface eth0 inet dhcp

Example to keep MAC address between reboots

#hwaddress ether DE:AD:BE:EF:CA:FE
iface eth0 inet static
address 192.168.5.21
netmask 255.255.255.0

The secondary network interface

#allow-hotplug eth1
#iface eth1 inet dhcp

WiFi Example

#auto wlan0
#iface wlan0 inet dhcp

wpa-ssid “essid”

wpa-psk “password”

Ethernet/RNDIS gadget (g_ether)

… or on host side, usbnet and random hwaddr

Note on some boards, usb0 is automaticly setup with an init script

iface usb0 inet static
address 192.168.5.20
netmask 255.255.255.0
network 192.168.5.0

The Moxa IP address is 192.168.5.127

so this should work right ?
but is it not
why?

Maybe "ifup eth0"

Above you show eth0 as up but no ipv4 address is assigned.

Might be helpful if you say exactly what image you're running as the networking isn't the same on all the images.

Mike