/mcpNote To use this option, your hub or the Ethernet switch must support automatic negotiation. • To disable automatic negotiation, choose No. The NIC Speed and Duplex Configuration window displays. Continue with the next step. Step 2 If you chose to disable automatic negotiation, manually choose the appropriate NIC speed and duplex settings now and choose OK to continue. The MTU Configuration window displays. Step 3 In the MTU Configuration window, you can change the MTU size from the operating system default. The maximum transmission unit (MTU) represents the largest packet, in bytes, that this host transmits on the network. If you are unsure of the MTU setting for your network, use the default value. Caution If you configure the MTU size incorrectly, your network performance can be affected. • To accept the default value (1500 bytes), choose No. • To change the MTU size from the operating system default, choose Yes, enter the new MTU size, and choose OK. The DHCP Configuration window displays. Step 4 For network configuration, you can choose to either set up static network IP addresses for the node and gateway or to use Dynamic Host Configuration Protocol (DHCP). Static IP addresses are recommended. If you use DHCP, use static DHCP. • If you have a DHCP server that is configured in your network and want to use DHCP, choose Yes. The installation process attempts to verify network connectivity. • If you want to configure static IP addresses for the node, choose No. The Static Network Configuration window displays. Step 5 If you chose not to use DHCP, enter your static network configuration values and choose OK. The DNS Client Configuration window displays. Step 6 To enable DNS, choose Yes, enter your DNS client information, and choose OK. After the system configures the network and checks for connectivity, the Remote Patch Configuration window displays. Step 7 Enter the location and login information for the remote file server. The system connects to the remote server and retrieves a list of available upgrade patches. If the upgrade file is located on a Linux or Unix server, you must enter a forward slash at the beginning of the directory path. For example, if the upgrade file is in the patches directory, you must enter /patches. If the upgrade file is located on a Windows server, remember that you are connecting to an FTP or SFTP server, so use the appropriate syntax, including: • Begin the path with a forward slash (/) and use forward slashes throughout the path. • The path must start from the FTP or SFTP root directory on the server, so you cannot enter a Windows absolute path, which starts with a drive letter (for example, C:). Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 52 Installation Methods Upgrade Install Image from Remote Server