8860ch02.fm Draft Document for Review September 23, 2019 1:36 am 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: 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. 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. 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. 2.7.6 Setting up Server Time Protocol 2.7.5 Support Element settings GLYPH<SM590000> OSA-Express feature configuration GLYPH<SM590000> Ethernet LAN configuration GLYPH<SM590000> Client TN3270E configuration 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). Chapter 2. Planning considerations for CPC in PR/SM mode  17