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using the resource names. Refer to the IBM TotalStorage NAS Gateway 500
Advanced Configuration and Problem Determination Guide for more information.
Working with the NAS Gateway 500 and the central database
When you install the Electronic Service Agent program (svcagent.server) on the
NAS Gateway 500, that server becomes the Electronic Service Agent gateway
server by default . The active hostname of the machine becomes the default
gateway machine name for Electronic Service Agent and is configured to be the
reporting contact point for all communication interfaces. The communications
interface to which the active hostname points to becomes the designated interface
for all communications with Electronic Service Agent gateway server.
With the latest release of Electronic Service Agent, the hostname can be configured
to a different communication hostname before Electronic Service Agent is started.
The Electronic Service Agent database application registers socket 1199 as the
Java RMI direct contact port on that named interface.
All configuration and setup data for monitored systems is maintained on the
Electronic Service Agent gateway server and its central Java database. All
monitored machines and Electronic Service Agent user interfaces are attached to
and use that central database using Java to Java RMI communication over the
default interface.
Figure 47 shows a typical Electronic Service Agent network.
Node 2..n
NAS Gateway 500
Service
Gateway
Agent
Client
Connection
Manager
Figure 47. Typical NAS Gateway 500 Electronic Service Agent network
Understanding modems and TCP/IP addressing
The Service Agent Connection Manager (SACM) can communicate with IBM using
the Internet or modem. Because the SACM can handle input from a configured
Electronic Service Agent gateway and client machine, a single Internet connection
or modem is all that is needed to support a complex Electronic Service Agent
configuration. Because redundancy can be achieved by using the secondary SACM
as backup, a primary Internet connection to IBM could be backed up with a
secondary dial setup.
Note: This is not done automatically. Manual intervention is required to switch
between IP and modem connection to IBM.
If the existing TCP/IP allows connection to the Internet, the modem might not be
needed. A modem can only be attached to serial port 2 (S2) on the NAS Gateway
500. This allows the Dialer to connect to the AT&T Gateway to access IBM service.
Node 1
ESA
Modem
Internet
IBM
Chapter 31. Call home
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