Specifications

4-16
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5
OL-23092-01
Chapter 4 Configuring Settings on the Cisco Unified IP Phone
Network Configuration Menu
Understanding DHCPv6 and Autoconfiguration
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.
IPv6 TFTP Server 2
(SCCP phones
only)
Optional backup IPv6 TFTP server that the phone
uses if the primary IPv6 TFTP server is
unavailable.
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:
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.
1. Unlock the CTL or ITL file, if necessary. If the
CTL and ITL files both exist, unlock either
file.
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 Valida t e softkey, and then press the
Save softkey.
Table 4-4 IPv6 Configuration Menu Options (continued)
Option Description To Change
Table 4-5 Determining Where a Phone Acquires Its Network Settings
DHCPv6 Auto IP Configuration How the Phone Acquires its IP Address and Network Settings
Disabled Disabled You must manually configure an IP address and the other network settings.
Note When DHCPv6 is disabled, the Auto IP Configuration setting is
ignored.
Disabled Enabled You must manually configure an IP address and the other network settings.
Note When DHCPv6 is disabled, the Auto IP Configuration setting is
ignored.