6.3.1 Configuring OAT and SNA LLC2 timer for OSE channel When you define OSA-Express as OSE channel (non-QDIO mode), you must customize OSA  Address Table (OAT)  except  for the following uses: For more information, see  Open Systems Adapter-Express Customer’s Guide and Reference,  SA22-7935. You can edit OAT with Open Systems Adapter/Support Facility (OSA/SF). OSA/SF is a tool for  customizing OSA-Express. From zEC12 GA2, the OSA/SF tool is available on HMC. It is  included as a submenu of the OSA Advanced facilities.  You must use OSA/SF on the HMC to define OSA Address Table (OAT) and SNA definition for  OSA-Express5S/6S. You can still use OSA/SF running on z/OS for OSA-Express4S, but  generally migrate to OSA/SF on HMC.  The OSA/SF tool capabilities are compared in Table 6-2. GLYPH<SM590000> Use  only  the default OAT and do  not  use (require) port sharing. GLYPH<SM590000> OSA-Express Direct SNMP subagent. For other CHPID types, OSA/SF is not required. If you need to change the port speed or the  Media Access Control (MAC) address, you can configure it from the OSA Advanced Facility.  The OSA CHPID type and OSA/SF requirements are listed in Table 6-3. Type of OSA/SF Supported OSA Express On HMC OSA Express-4S/5S/6S On z/OS, z/VM OSA Express-4S OSA CHPID type  OSA/SF  OSE Required OSD Not required OSC Not supported OSX Not supported OSM Not supported Table 6-2 OSA/SF comparison Table 6-3 OSA/SF and OSA CHPID reference Note:  OSN channel is not supported on z14. When you use SNA network with OSE CHPID type and need to change SNA timer (SNA  LLC2 parameter), you must customize the parameters in OSA/Advanced facilities. For more  information, see  Open Systems Adapter-Express Customer’s Guide and Reference,  SA22-7935. If you are upgrading from z13s to z14 ZR1, and your configuration uses the OSA Express-5S  1000Base-T feature, your OSE configuration is automatically migrated. After this process is  complete, check the configuration in OSA/SF on the HMC. 128  IBM z14 Model ZR1 Configuration Setup