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Without route aggregation, if a service is announced with an address that is not explicitly reachable, RIP assumes the service is unreachable. When NLSP and RIP are used with route aggregation, SAP is accepted, provided a packet can be forwarded to the corresponding network number. A packet can be forwarded when there is a default route and address summary or when there is an explicit advertisement of that network number.
This feature is disabled by default. It can be enabled by entering the following command after IPXRTR.NLM has been loaded:
SET REQUIRED NETWORK FOR SERVICES=ON
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