Chapter 8. STUN Design and Configuration

STUN is the basic encapsulation technique for transmitting SDLC-connected SNA devices to an IBM SNA host computer. STUN enables a single network to carry both SNA data and multiprotocol LAN data across a WAN.

Figure 8-1 illustrates the advantage of using STUN for combining the two networks into one. The SDLC frames may be encapsulated using direct HDLC encapsulation, TCP, and Frame Relay. All SDLC traffic is passed through the WAN over the STUN connection, including all supervisory and control frames between the end SNA devices.