GLYPH<SM590000> OSA-Express feature configuration 

GLYPH<SM590000> Ethernet LAN configuration 

GLYPH<SM590000> Client TN3270E configuration 

The OSA-Express feature configuration requires configuration tasks to be performed on the HMC using the OSA Advanced Facilities task. Collect information for the following parameters before starting the configuration activities: 

GLYPH<SM590000> OSA-ICC server: Name, Host IP address, TCP port number, Gateway IP address, the network type, and the MTU size 

GLYPH<SM590000> OSA-ICC session definitions: Channel subsystem, the MIF (LPAR) ID, Device number, LU-name, client IP address, IP Filter, the session type, defer host disconnect (DHD), response mode (RSP9), read timeout (RTO). 

Note:  Consider defining multiple sessions per LPAR to allow access for a number of users at the same time. 

For an upgrade of an existing IBM Z server to a z15, these definitions can be exported from the source machine using on-board HMC facilities and imported back again after the upgrade is complete. 

See Chapter 7, “Defining console communication” on page 149 for details about the definitions. Also, see the OSA-Express Integrated Console Controller Implementation Guide , SG24-6364, for implementation details. 

## 2.7.5 Support Element settings 

The SEs supplied with the z15 are two appliances based on 1U x86 servers. Both units are installed at the top of the A frame. One is a primary SE and the other is the alternate SE. 

Generally, the SE settings are considered part of the physical installation of the z15 server and therefore not presented in this book. For a new z15 server, a new range of TCP/IP addresses must be provided by the customer to the system services representative (SSR) who performs the physical installation. As an extra measure of security, provisioning of a separate LAN segment for the management functions is preferred. During an upgrade from an older IBM Z server to a z15, the current settings on the SEs should be backed up for migration purposes. 

In addition to the standard SE configuration, there could be also other parameters that should be backed up, such as the API Settings. These parameters can be accessed through the Customize API Settings task on the SE. 

## 2.7.6 Setting up Server Time Protocol 

Important:  Managing System Time (STP) on a z15 CPC requires appropriate HMC (HMC 2.15.0). The Support Element “Sysplex Timer” menus on a z15 are not available, as such HMC IS required to manage system time. 

STP provides the means by which the time of day (TOD) clocks in various systems can be synchronized by using messages transported over coupling links. STP operates along with the TOD-clock steering facility, providing a new timing mode, timing states, external interrupts, and machine check conditions. 

