Locate resource: Network node receives network broadcast request

Figure 1. Locate resource: Network node receives network broadcast request

Note: This figure illustrates only the flows at NN1.

CDS1 has reached the point in its search logic where a network broadcast is performed. CDS1 sends the network broadcast to all network nodes with which it has CP-CP sessions.
NN1 recognizes that the request is a network broadcast. Therefore, it forwards the request immediately to all network nodes with which it has CP-CP sessions.
NN1 then begins to search itself and its domain. NN1 looks for the target resource in its directory database. NN1 does not have an entry for the target resource. The search continues with the APPN CP requesting that the subarea SSCP check its resource information for information about the location of the resource.
The subarea SSCP replies that the target is not known.
NN1 sends the domain broadcast request to all served ENs that indicated in the CP_CAPABILITIES exchange that they are to be searched on domain broadcasts.
The APPN CP forwards the search to the subarea SSCP.
The subarea SSCP indicates that the target resource was found.
EN1 returns a positive reply.
NN1 forwards the positive reply to CDS1 and continues to wait for a reply from NN2. NN1 indicates to CDS1 in its reply that NN1 has not yet received replies to all of its searches. CDS1 forwards the positive reply to the originator of the search and continues to wait for a final reply from NN1.
NN2 returns a negative reply to NN1. Because NN1 has now completed all of its searches, NN1 returns a Neutral reply to CDS1 to indicate that NN1 has completed its search. A Neutral reply is one that contains neither a CV'35' (to indicate failure) or a FOUND GDS variable (to indicate success). A CDS receiving a neutral reply does not forward the neutral reply to the originator of the search. A CDS returns only one reply to the originator to indicate success or failure.