Visara FEP-4600 Planning Guide User Manual

Page 26

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Chapter 2. Support of PU 2.0 Platforms

2-8

707117-003

SDLC Support Through the XCA

XCA was primarily designed to support LAN based nodes. The FEP-4600 also supports
SDLC-attached PU 2.0 nodes by making them appear to be LAN attached. A virtual
MAC address is assigned to the SDLC device in the FEP-4600 configuration (through a
gateway circuit) and assigned to one of the network adapters. All traffic destined to the
virtual address is diverted to the associated gateway circuit that in turn sends the traffic
down the proper SDLC line.

XCA Pipe

ESCON

VTAM

FEP-4600

Switched
Definitions

Ethernet

ETH0

ETH1

SAP04

SAP08

LLC2 Traffic

QSI1

LLC2 to SDLC

Gateway