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Figure 16-2
SLP Directory Agent Interaction
When a client application queries the User Agent for a network service, the User Agent in search of
service information unicasts a Service Request to the Directory Agent. The Directory Agent returns
a Service Reply that has the requested service URLs or an indication that no requested services are
available. The same scenario is repeated by the User Agent and Directory Agent for Service Type
Requests and Attributes Requests.
When the network service is terminated, it deregisters its service with the Service Agent, which
deletes the service from its local service cache and then sends a Service Deregister request to the
Directory Agent. The Directory Agent then deletes the indicated service from its service cache.
16.3 Understanding Local Mode
Novell Directory Agents can be installed and configured so that the Local mode operation can do the
following:
Provide a centralized repository of service URLs.
Facilitate the use of SLP scopes.
Create customized scopes by selectively gathering services from other scopes.
Proxy scopes directly supported by other Directory Agents or Service Agents.
Improve SLP scalability, performance, and network efficiency.
Facilitate the use of SLP in networks not supporting IP multicast.
Act as private Directory Agents for closed groups of Service Agents and User Agents through
Private Mode.
Filter service content of SLP scopes based on service type, service URL, service lifetime, and
the IP address of the Service Agent or User Agent.
Summary of Contents for EDIRECTORY 8.8 SP5
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