The minimum metric, for the throughput Class of Service (COS), to
the destination Node. The metric associated with a path is computed
by the routing system based on the sum of the COS metrics
associated with the links in the path to the destination. A path with a
lower metric value is preferable to one with a higher value as it is
associated with the best COS attribute facilities. The metric
displayed is that of the best path(s).
A metric value of 2147483647 means the Node is unreachable. A
value of 0 indicates that no cost is associated with the path to the
destination. This would be the case for the local node's Id.