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7-1
Chapter 7
SNA Status and Configuration
Configuring SNA ports; physical unit and LLC2 parameter configuration; configuring link stations;
configuring LLC2 hosts; viewing statistics
SNA ports in the FRX4000, FRX6000, and SmartSwitch 1800 connect IBM hosts
with PUs (physical units), over a frame relay (via RFC 1490) or X.25 (via Annex G)
network. SNA support includes SDLC (Synchronous Data Link Control) for serial
lines and LLC2 (Logical Link Control type 2) for LAN connections.
SDLC-to-LLC2 and LLC2-to-SDLC conversion is performed for transmission over
frame relay.
For each physical port conÞgured to run SNA, six conÞguration windows are
provided:
¥ The SDLC Port ConÞguration window allows you to conÞgure the SNA port
that will connect to user devices;
¥ The SDLC PU ConÞguration window, where you deÞne the physical units
(PU) that will communicate via the SNA port;
¥ The SDLC PU LLC2 ConÞguration window, where you conÞgure the physical
unitÕs LLC2 parameters (if SDLC-LLC2 conversion will be performed on the
PU connection);
¥ The SDLC Link Station ConÞguration window allows you to conÞgure the
SDLC link stations;
¥ The SNA/LLC2 Hosts Table where each SNA/LLC2 host device is conÞgured;
¥ The LLC2 Hosts Connections Tables where LLC2 Host connections are
conÞgured.