HP-UX SNAplus2 R7 Administration Guide

Appendix DUsing SNAplus2 in a High Availability Environment

Figure D–7 SNAplus2 in Client/Server Conﬁguration

Client

3xxx

Communications

Controller

IBM

Host

LAN

S800

Server

Standby LAN adapter

client/server LAN

connection

SNAplus2 uses an internal mechanism to inform applications running on client systems about the IP addresses they

should use to access each particular server. This mechanism does not forward information about the IP address

associated with the SNAplus2 package, so clients will use only the stationary IP address associated with the server’s

LAN adapter.

To protect against a failure of a server’s LAN adapter, you can conﬁgure a standby LAN adapter for the server.

You can conﬁgure ServiceGuard to assign the primary LAN adapter’s IP address to the standby LAN adapter in the

event of a failure. This way, TCP/IP connections from the client system to the server system would be maintained

during the switch.

SNA LAN Connections

Another way SNAplus2 uses LANs is when the SNAplus2 server is connected to the remote SNA system via a

LAN.

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