ADTRAN 1200130L1, 1200130L2 user manual SNA /SDLC with Local Spoofing

Chapter 4. Applications

In all cases, the FSU is transparent to the XID (exchange identifica- tion) negotiation between any two network devices.

The FSU uses LLC protocol (mode 2) to transport SDLC informa- tion frames. This protocol ensures a reliable link across frame relay, providing protection from frame loss and excessive delays. The encapsulation method uses the RFC 1490 format. See Table

4-A for an example of how to configure the FSU for this applica- tion.

Remote End

PU Address = C0

SDLC

3270 Controller

SDLC

3270 Controller

PU Address = C0

DTE1

N

DTE2

FSU

DLCI=17DLCI=120

FRAME RELAY

UNI UNI

RFC1490/LLC2

DTE1

N

DTE2

FSU

Host End

PU Address = C0 PU Address = C1

SDLC

FEP Host

Figure 4-1

SNA /SDLC with Local Spoofing

22 FSU User Manual 61200.130L1-1