LinkTest.exe could be used to test link status (ifOperStatus.x).
1 to 10 links could be tested.
The return value is a number. 0 for testFail or 100 for testPass.

Syntax
linktest.exe testsToBePassed community timeout retries n.n.n.n:i n.n.n.n:i


Example
linktest.exe 1 public 2 2 192.168.10.220:9 192.168.10.35:5

The first argument is used to set a minimum level for how many tests that
must be passed to return the value 100.

if both links are up the return value = 100
if one link is up the retrun value = 100
if no links are up the return value = 0


To run in debug mode you should create a file named linkdebug.txt
in the same directory as linktest.exe

NB!
In SNMPc you must use a Timeout Value that is a little longer than
timeout x (retries + 1) x numberOfTests.

In the example above this is 12 secs, so use Timeout=15 in SNMPc.
Always set Retries=0 in SNMPc.