How to detect software down line on the opposite routerboard?

RouterOS Scripting
1

I have two RouterBOARD RB750 (A and B) interconnected by ethernet cable in ports ether1.
The first (routerboard A) I switched down linked port by script “/interface disable ethernet ether1” (port really turns off, the LED goes off and displays “no link”) - but by the second (routerboard B) still sees link (LED lights and show status the “link ok”). How to detect software down line on the opposite routerboard?
I need it for bonding study (active backup and link monitoring by mii - prepend RB750 me supplants link monitoring by ARP - in our network with Cisco switches is problematic, causing MAC flapping)

2

You can use ping to monitor neighbor interface:
For example:
{
:local PING ([/ping 10.5.115.1 count=3]);
:if ($PING > 2) do={:put “Interface up”};
:if ($PING = 0) do={:put “Interface down”};
}

You can also do ARP ping if you don’t have an IP address on that interface:
ping arp-ping=yes interface=ether2 00:0C:42:8A:AF:E8

And you can use Netwatch tool to automate this task:
http://wiki.mikrotik.com/wiki/Manual:Tools/Netwatch