24 FSU User Manual 61200.130L1-1
Chapter 4. Applications
SNA and LAN Application with SNMP/Telnet Management
When used in a mixed environment consisting of both SNA and
LAN networks, the FSU serves as a concentrator, allowing both
networks access to one frame relay link. The example shown in
Figure 4-2 shows DTE 1 configured for SDLC protocol (as in the
previous 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 frame
relay address table. The FSU emulates the network end of the
UNI signaling protocol for the DTE port while emulating the
CPE end for the network port. PVC status information from the
frame relay network is stored and used for full status requests
from the router attached to the DTE port.
A local DLCI is set up between the router and the FSU. This
Management DLCI carries the SNMP and telnet traffic destined
for the FSU. This DLCI is included in the UNI full status re-
sponses to the router. The FSU IP address must be mapped to
the management DLCI in the LAN router's route table (see the
following note). With this path, an SNMP manager located
anywhere in the network can access the FSU's SNMP and telnet
information. See Table 4-B for an example configuration.
RIP and inverse ARP are not used for the FSU DTE frame relay port.