The first possible link group available that can be used to reach a
neighbour which is the next hop in the path to the destination Node
for the throughput Class of Service (COS). VNS traffic is routed
deterministically across the links in up to two link groups, when
available. The link groups selected are those associated with
minimum metric COS paths to the destination. If two link groups
are in use then the metric of the paths associated with each are
identical.
If no link groups are listed then the destination is not reachable
(except in the case of the local node's Id).
Link group instances are managed by the TransportResource
component. Further information about the links in the group can be
obtained from it.