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SNA/SDLC with Local Spoofing
61200.130L1-1
This chapter provides examples of some common FSU applica-
tions. The examples include SNA/SDLC with local spoofing,
SNMP/Telnet management, bisync point-to-point and multi-
point, and transparent applications. The configuration selections
given in these examples may need modification based on your
network configuration.
When used in an SNA/SDLC network, the FSU provides local
spoofing by emulating the primary or secondary SDLC roles (see
Figure 4-1). The FSU performs conversion from SDLC to frame
relay and also terminates SDLC links, providing primary and
secondary emulation between FSUs. Local spoofing improves
performance by reducing traffic across the frame relay network
and allows definite response times on the SDLC links.
To perform spoofing, the FSU automatically sets itself up to
provide primary or secondary emulation based on the receipt of
SNRM (set normal response mode) from an SDLC device. The
FSU looks for SNRM on all ports and assumes a secondary role
once SNRM is received. The FSU then brings up the LLC2 link
across the frame relay network to another FRAD which assumes
a primary role. This allows the FSU to operate with PU 2.1
devices.
Different roles can be assumed for each SDLC session. Discon-
nection starts the role determination procedure again.
FSU User Manual
Chapter 4. Applications
Chapter 4
Applications
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