This section describes the methods applied in unicast routing to respond
to changes in the topology.
The complete sequence of actions that cause the changes in the topology,
and fire the appropriate actions is described in a different section.
The response to topology changes falls into two categories:
actions taken by individual agents at each of the nodes, and
actions to be taken globally for the entire protocol.
30.4.2 Interface to Network Dynamics and Multicast
Detailed routing protocols such as the DV implementation
require actions to be performed by individual protocol agents at the
Centralized routing protocols such as static and session routing fall into
the latter category exclusively.
Detailed routing protocols could use such techniques to gather statistics
related to the operation of the routing protocol;
however, no such code is currently implemented in ns.