IBM DS8000 manual Dial-up connection, Secure high-speed connection, 163

￿TCP/IP interface network mask (for example, 255.255.254.0).

￿If you plan to use a Domain Name Server (DNS) to resolve network names, you will need the IP address of your DNS server and the name of your DNS. You may have more than one DNS.

￿You can specify a default gateway in dotted decimal form or just the name in case you are using a DNS.

The S-HMC can also be connected to the IBM organization’s support services using:

￿A dial-up connection

￿A secure high-speed connection

Dial-up connection

This is a low-speed asynchronous modem connection to a telephone line. This connection typically favors small amounts of data transfers. When configuring for a dial-up connection, have the following information available:

￿Which dialing mode will be used, either tone or pulse.

￿Whether a dialing prefix is required when dialing an outside line.

Secure high-speed connection

This connection is through a high-speed Ethernet connection that can be configured through a secure virtual private network (VPN) internet connection to ensure authentication and data encryption. IBM has chosen to use a graphical interface (WebSM) for servicing the storage facility, and for the problem determination activity logs, error logs, and diagnostic dumps that may be required for effective problem resolution. These logs can be significant in size. For this reason, a high-speed connection would be the ideal infrastructure for effective support services.

A remote connection can be configured to meet the following customer requirements:

￿Allow call on error (machine-detected)

￿Allow connection for a few days (customer-initiated)

￿Allow remote error investigation (Service-initiated)

Figure 9-3 on page 164 shows a typical redundant S-HMC configuration. In this configuration, we have MC1 (internal S-HMC) and MC2 (external S-HMC) connected to the 172.16-BLACK network and the 172.16-GRAY network. These two networks are the private Ethernet networks of the DS8000. MC1 and MC2 are also connected to the customer’s network by way of the customer Ethernet ports on the pair of Ethernet switches that are installed at installation time.

Chapter 9. Configuration planning 163