4. The Set Card Mode or Speed window opens (see Figure 6-22). Select the correct port  speed from the Speed/Mode list. You can set the speed of port 0 and 1 individually. Click  OK . 5. To effect the changes, you must configure CHPID OFFLINE and ONLINE from every  LPAR where this CHPID is defined. Figure 6-22 Set card mode or speed Changing OSA MAC address To change the MAC address, complete the following steps:  1. Log on to the HMC.  2. Open OSA Advanced Facilities, and select the PCHID that you want to customize.  3. The Advanced Facilities window opens (see Figure 6-23). Select  Display or alter MAC  address  and then, click  OK . Figure 6-23 Display or alter MAC address Chapter 6. Configuring network features  137