HP UX SNAplus2 manual TN Server LAN Connections, Figure D-9 SNAplus2 Server Running TNServer

Using SNAplus2 in a High Availability Environment

Using SNAplus2 with MC/ServiceGuard

TN Server LAN Connections

One application that can take advantage of both local LAN failover and floating IP addresses in an SNAplus2 network is TN3270. When you run TN3270, you specify a particular IP address to contact. When an SNAplus2 server is running the TN Server component, the IP address you specified can be the IP address of the SNAplus2 package.

Figure D-9 SNAplus2 Server Running TNServer

TN3270

Client

LAN

TN Server LAN connection

S800

Server

3xxx

Communications

Controller

IBM

Host

Since TN3270 and TN Server communicate over a telnet (TCP/IP) connection, this connection can be maintained during a local LAN failover or can be quickly reestablished when the package is migrated to another server. The only requirement is that you specify the floating IP address associated with the SNAplus2 package, or a name that can be mapped to that IP address by TN3270 (using whatever method is available on the TN3270 client system).

374 Appendix D