/mcpThe Publisher Settings window appears. You can view the publisher IP address only on the subsequent node of the cluster, not on the publisher itself. Note Configure NTP Servers Ensure that external NTP servers are stratum 9 or higher (1-9). To add, delete, or modify an external NTP server, follow this procedure: You can only configure the NTP server settings on the first node or publisher. Note Step 1 From the Cisco Unified Operating System Administration window, navigate to Settings > NTP Servers. The NTP Server Settings window appears. Step 2 Add, delete, or modify an NTP server: To avoid potential compatibility, accuracy, and network jitter problems, the external NTP servers that you specify for the primary node must be NTP v4 (version 4). If you are using IPv6 addressing, external NTP servers must be NTP v4. Note • To delete an NTP server, select the check box in front of the appropriate server, and then click Delete. • To add an NTP server, click Add, enter the hostname or IP address, and then click Save. • To modify an NTP server, click the IP address, modify the hostname or IP address, and then click Save. Any change that you make to the NTP servers can take up to 5 minutes to complete. Whenever you make any change to the NTP servers, you must refresh the window to view the correct status. Note Step 3 To refresh the NTP Server Settings window and view the correct status, choose Settings > NTP. After deleting, modifying, or adding the NTP server, you must restart the other node in the cluster for the changes to take effect. Set SMTP settings Use the SMTP Settings window to view or set the SMTP hostname and determine if the SMTP host is active. If you want the system to send you e-mail, you must configure an SMTP host. Tip To access the SMTP settings, follow this procedure: Step 1 From the Cisco Unified Operating System Administration window, navigate to Settings > SMTP. The SMTP Settings window appears. Step 2 Enter or modify the SMTP hostname or IP address. Cisco Unified Operating System Administration Guide for Cisco Unified CCX and Cisco Unified IP IVR, Release 12.5(1) SU3 17 Settings Configure NTP Servers