We came to ZS again.After making unremitting efforts,SourceFlow succeeded in receiving netflow
data steadily.
I was busy with research work for layer-2 discovery.Further study shows not only Aij＝Ak ＋ Sk_MAC
is right,there are conditions under which Aij＝Ak or Aij＝Ak ＋ if_mac can deduce two switches are
directly connected.
This is a very important conclusion.