HP-UX SNAplus2 R7 Administration Guide

Appendix DUsing SNAplus2 in a High Availability Environment

Figure D–8 SNAplus2 Server connected to remote system via LAN

3xxx

Communications

Controller

IBM

Host

HP 9000

Server

Token

Ring LAN

For this type of communication, SNAplus2 communicates with the LAN driver using a Streams DLPI interface.

Since ServiceGuard only supports local LAN failover for IP network trafﬁc, SNAplus2 will not be able to take

advantage of local LAN failover or ﬂoating IP addresses in this case. If an SNA LAN adapter fails, SNA sessions

will be disconnected and the normal package failure recovery will take place.

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.

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