Multi-Tech Systems 40-01459-D0-001 manual TCP/IP Direct Connect

Chapter 5. TCP/IP DIRECT CONNECT

TCP/IP Direct Connect software included with the PCI ESCON Adapter provides high-performance, point-to-point TCP/IP communications between a Windows server (Windows 2000 or Windows NT 4.0) and the mainframe. TCP/IP Direct Connect operates over Channel-to-Channel (CTC) or Multi-Path Channel Plus (MPC+) links. TCP/IP Direct Connect is not required and does not need to be installed for TCP/IP Passthrough for Windows NT, Communications Server, Microsoft’s Host Integration Server or Microsoft’s SNA Server.

TCP/IP Direct Connect provides an interface compliant with the Network Driver Interface Specification (NDIS). This allows Microsoft’s TCP/IP stack to communicate with the ESCON adapter in the same fashion it would use to communicate with any other network interface card (NIC). TCP/IP applications running on the server can communicate across the ESCON adapter with peer applications running on the IBM mainframe (Figure 5-1).

Application

TCP/IP

ESCON

Application

TCP/IP

TCP/IP

Direct Connect

Figure 5-1. Point-to-Point TCP/IP

Further, when Windows is properly configured for IP forwarding, any client in a TCP/IP network can gain immediate access to TCP/IP applications and/or services running on the mainframe (Figure 5-2).

Application

TCP/IP

TCP/IP

TCP/IP DC

TCP/IP

Network

Application

TCP/IP

Figure 5-2. Distributed TCP/IP Applications

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