extremeEapsSharedPortRootBlockerStatus
1.3.6.1.4.1.1916.1.18.5.1.9
If this shared port instance is not in Root blocker state,
the status is False.
If the shared port is in Root blocker state, and its
path detect message is being returned to it, it is in
Active state.
If the shared port is in Root blocker state, but its
path detect message is not making it back to itself, then
its root blocker status is Inactive.