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4.3 The Discovery Process for Clients to Find Servers ToC Previous Next

4.3.4 Local Discovery ToC Previous Next

In many cases Clients do not know which Servers exist but possibly know which hosts might have Servers on them. In this situation the Client will look for the LocalDiscoveryServer on a host by constructing a DiscoveryUrl using the Well-Known Addresses defined in OPC 10000-6.

If a Client finds a LocalDiscoveryServer then it will call the FindServers Service on the LDS to obtain a list of Servers and their DiscoveryUrls. The Client would then call the GetEndpoints service for one of the Servers returned. The discovery process for this scenario is illustrated in Figure 3.

readme_files/image005.png Figure 3 – The Local Discovery Process

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