Chapter 10. Remote Mirroring configuration 251
In which order should the setup be performed? It is possible to install and
configure two NAS 500 Gateways on the different locations. This makes it
hard to find any performance problems which are not GeoNetwork related.
Also, the initial configuration from one site can only be performed if there is a
communication path existing to the remote site. The other possibility is to
configure both systems first on one site to make all run and then ship one
node to the remote site.
The more nodes are involved, the more complex the environment will become.
Good planning is really necessary, since otherwise you could get in real trouble
during or after the configuration. We recommend that you use the planning
sheets that are provided with the IBM TotalStorage NAS Gateway 500 Planning
Guide, GA27-4335-01, and clarify all open points before you start your
10.2.1 Supported configurations
The NAS Gateway 500 supports the following two configurations.
The NAS Gateway 500 has three serial ports. Port one is for connecting a
terminal or laptop with a terminal emulation program, port two is for attaching a
modem which can do a call home to IBM if a problem exists and port three is
either for a UPS connection or if you have a local cluster or 2 nodes at the same
site for the cluster heartbeat. With the NAS Gateway 500 it is not supported to
use a serial network between the sites.
GeoNetworks have to be independent of the file serving networks, a minimum
requirement includes separate Ethernet ports. These should be attached to
independent Ethernet switches that support link aggregation. Link aggregation
allows the GeoNetwork connection to survive a failure of a network adapter in the
NAS Gateway 500.
10.3 Two-node cluster configuration
In this section we show you how to configure a simple, active/standby, two-node
HACMP/XD cluster with NAS Gateway 500.
Note: All IP addresses, names, and adapter slot numbers specified in this
section are for our sample configuration. You may have different slot numbers
of adapters, names, and IP addresses for your configuration.