This object is used to indicate that the repeater
detected an error-free training frame on this port
with a source MAC address which matches the value of
icfVgAddrLastTrainedAddress of another active port.
This is reset to 'false' when an error-free training
frame is received with a source MAC address which
does not match icfVgAddrLastTrainedAddress of another
port which is active. For the cascade port, this
object will be 'true' if the 'D' bit in the most
recently received error-free training response frame
was set.