If a router is connected to an EC, the router takes over the function of the FEP, and must therefore be configured as a primary SDLC station. If the router is connected to a FEP, the router takes the place of the EC, and must therefore be configured as a secondary SDLC station. This command has no arguments or keywords. Then establish the router as a secondary station. Next, assign secondary station addresses to the primary station using the sdlc address command.
Primary nodes poll secondary nodes in a predetermined order.
Secondaries then transmit if they have outgoing data. When configured as primary and secondary nodes, our routers are established as SDLC stations.