The accounting table identifier.
'passed' : signifies that this table instance
represents statistics for packets that
matched an Access Control List (ACL) in
the linkset's inbound ACL and in the
outbound ACL.
'violation' : signifies that this table instance
represents statistics for packets that
did not match an ACL in the linkset's
inbound ACL and in the outbound ACL.
'unroutable' : packets that pass access list verification
but can not be sent to destination point
code. This could be caused by incorrect
or missing route statements or inaccessible
destination.