IBM BC-201 manual Ctrc and DB2, BC-241

Overview of IBM Networking

Cisco Transaction Connection

Figure 109 Cisco Router Configured with the CTRC Feature for CICS Communications

CICS client	CICS transaction
		monitor

	CTRC
				SNA
	TCP/IP	SNA
TCP/IP				APPC
	TCP/IP	SNA
			(LU 6.2)

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CTRC and DB2

CTRC enables Cisco routers to implement IBM’s DRDA over TCP/IP. The Cisco router with CTRC exists in the TCP/IP network, and clients use a CTRC IP address and port on the router to connect to the IBM host system that exists in either an SNA network or a TCP/IP network.

When CTRC is appropriately configured on a router, client-based ODBC applications can connect to the following IBM D2 relational databases:

•DB2 for OS/390 (MVS)

•DB2 for Virtual Machine (VM) (SQL/DS)

•DB2 for Virtual Storage Extended (VSE) (SQL/DS)

•DB2 for OS/400

•DB2 Universal Database (UNIX, Windows, OS/2)

For an SNA host connection, the router with CTRC converts DRDA packets over TCP/IP to DRDA packets over (APPC LU 6.2) and then routes them to DB2 databases. CTRC runs as a TCP/IP daemon on the router, accepting DRDA client connections over TCP/IP. When a client connects to the database on an IBM mainframe host, CTRC allocates an APPC conversation over SNA to an IBM server, and acts as a gateway between DRDA over TCP/IP and DRDA over APPC.

Figure 110 illustrates how the Cisco router configured with the CTRC feature enables the exchange of database information between ODBC client applications running DRDA in a TCP/IP network and a DRDA-based IBM system that accesses DB2 relational data.

Figure 110 Cisco Router Configured with the CTRC Feature for DB2 Communications (SNA Host Network)

ODBC client DRDA server RDBMS

CTRC

	TCP/IP	SNA		SNA
TCP/IP				APPC
	TCP/IP	SNA
(LU 6.2)

DB2 database

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	Cisco IOS Bridging and IBM Networking Configuration Guide
78-11737-02		BC-241