Locate resource: CP-CP session terminates

Figure 1. Locate resource: CP-CP session terminates

The subarea SSCP requests a search for a target resource.
The end node sends a search request for a target resource to the network node server. The network node looks for the target resource in the directory database. The network node has knowledge in the directory that the target resource resides on NN3.
The network node sends a directed search request to NN3. Because NN1 does not have direct CP-CP sessions with NN3, NN1 sends the directed search request to NN3 through NN2.
NN2 is not the destination of the directed search; therefore, NN2 forwards the request to NN3.
The APPN control point (CP) requests that the subarea SSCP check its resource information for information about the location of the resource.
The subarea SSCP replies that the target resource is found.
The APPN CP requests that the subarea SSCP initiate a search for the target resource.
The CP-CP session goes down between NN2 and NN3.
NN2 sends a negative reply to NN1. NN3 cleans up its control blocks.
NN1 continues its search logic. If another path to the target exists, the target can be found (for example, through a network broadcast search). Otherwise, the search does not find the target resource.