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## 6.3.2 Setting OSA parameters using OSA Advanced Facilities 

If you want to change the port speed or MAC address of an OSA-Express feature, you can use the OSA Advanced Facilities. Normally, changing MAC address is required for SNA networks. 

Port speed:  You can change only the port speed to OSA-Express5S/6S 1000BASE-T. Other OSA features do not include this capability. 

You cannot set port speed to 1000 Mbps for OSA-Express5S/6Sress4S 1000BASE-T. If you want to set the port speed to 1000 Mbps, you must select Auto Negotiate . 

## Setting the OSA port speed 

To change port speed, complete the following steps: 

1. Log on to the HMC, select the CPC you want to operate, and then, click Open OSA Advanced Facilities . 

2. Select the PCHID of the OSA channel for which you need to set the card mode. Select Card specific advanced facilities  and click OK . 

3. Select Set card mode  and click OK  (see Figure 6-21). 

<img src='content_image/990224.jpg'>

