Cisco CP-7975G Administration Guide - Page 94
Understanding DHCPv6 and Autoconfiguration, Option, Description, To Change, DHCPv6
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Network Configuration Menu Chapter 4 Configuring Settings on the Cisco Unified IP Phone Table 4-4 IPv6 Configuration Menu Options (continued) Option Description To Change IPv6 TFTP Server 2 Optional backup IPv6 TFTP server that the phone 1. Unlock the CTL or ITL file, if necessary. If the (SCCP phones uses if the primary IPv6 TFTP server is CTL and ITL files both exist, unlock either only) unavailable. file. If you make changes to the Alternate TFTP or IPv6 TFTP servers, you must first unlock the CTL or ITL file on the phone. When the phone looks for its TFTP server, it gives precedence to manually assigned TFTP servers, regardless of the protocol. If your configuration includes both IPv6 and IPv4 TFTP servers, the phone prioritizes the order that it looks for its TFTP server by giving priority to manually assigned IPv6 TFTP servers and IPv4 TFTP servers. The phone looks for its TFTP server in the following order: 2. Unlock network configuration options. 3. Enter an IP address for the IPv6 TFTP Server 1 option. 4. Scroll to the IPv6 TFTP Server 2 option, press the Edit softkey, and then enter a new backup TFTP server IP address. 5. Press the Validate softkey, and then press the Save softkey. 1. Manually assigned IPv6 TFTP servers 2. Manually assigned IPv4 TFTP servers 3. DHCPv6 assigned TFTP servers 4. DHCP assigned TFTP servers For information about the CTL or ITL file, refer to Cisco Unified Communications Manager Security Guide. For information about unlocking CTL or ITL files, see to Unlocking the CTL and ITL files, page 4-39. Understanding DHCPv6 and Autoconfiguration Table 4-5 You can choose to configure the IP address and other network settings, such as the TFTP server, DNS server, domain, name, etc. on an IP phone manually or by using a router and/or a DHCP server to automatically assign the IP address and other network information. For more information on how the Allow Auto Configuration for Phones and DHCPv6 settings determine where the IP Phone acquires its IPv6 address and other network settings, see Table 4-5. Determining Where a Phone Acquires Its Network Settings DHCPv6 Disabled Auto IP Configuration Disabled Disabled Enabled How the Phone Acquires its IP Address and Network Settings You must manually configure an IP address and the other network settings. Note When DHCPv6 is disabled, the Auto IP Configuration setting is ignored. You must manually configure an IP address and the other network settings. Note When DHCPv6 is disabled, the Auto IP Configuration setting is ignored. 4-16 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5 OL-23092-01