2 4 FSU User Manual 61200.130L1-1Chapter 4. ApplicationsSNA and LAN Application with SNMP/Telnet ManagementWhen used in a mixed environment consisting of both SNA andLAN networks, the FSU serves as a concentrator, allowing bothnetworks access to one frame relay link. The example shown inFigure 4-2 shows DTE 1 configured for SDLC protocol (as in theprevious example). DTE 2 is configured for frame relay proto-col, providing the LAN gateway/router with frame relay access.The FSU routes data at the DLCI level using the DTE 2 framerelay address table. The FSU emulates the network end of theUNI signaling protocol for the DTE port while emulating theCPE end for the network port. PVC status information from theframe relay network is stored and used for full status requestsfrom the router attached to the DTE port.A local DLCI is set up between the router and the FSU. ThisManagement DLCI carries the SNMP and telnet traffic destinedfor the FSU. This DLCI is included in the UNI full status re-sponses to the router. The FSU IP address must be mapped tothe management DLCI in the LAN router's route table (see thefollowing note). With this path, an SNMP manager locatedanywhere in the network can access the FSU's SNMP and telnetinformation. See Table 4-B for an example configuration.RIP and inverse ARP are not used for the FSU DTE frame relay port.
