Ping between two Beaglebone Black via Ethernet + PLC

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1

I have 2 BBB, following is the setting:
BBB1:
IP: 172.1.2.1
Netmask: 255.255.0.0

BBB2:
IP: 172.1.3.1
Netmask: 255.255.0.0

I connect as BBB - eth0(RJ45) - PLC - PowerLine - PLC - eth0(RJ45) - BBB
This method I can work fine on Beaglebone(White), but BBB cant work.(Only changed board)
Does anyone has idea? Thanks.

2

Run tcpdump on the network interface, check that the ICMP packet is actually getting out through the interface, and similarly check what does tcpdump see on the receiving system.

3

there is nothing shown on terminals.

My operator:
BBB1:
tcpdump -v icmp
tcpdump -i eth0
tcpdump -vvv

BBB2:
ping BBB1’s IP

4

When I ping each other, both show “Destination Host Unreachable”