User's Manual

4-17
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-23091-01
Chapter 4 Configuring Settings on the Cisco Unified IP Phones
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, and name on an IP Phone manually or by using a router or a DHCP server to
automatically assign the IP address and other network information. For more information on how the
Auto IP Configuration 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 file 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 file or ITL file, see Cisco
Unified Communications Manager Security Guide. For
information about unlocking the CTL file, see
Unlocking
the CTL and ITL Files, page 4-41.
1. Unlock the CTL file or ITL file if
necessary. If both the CTL file
and ITL file exist, unlock either
of the files.
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.
Table 4-4 IPv6 Configuration Menu Options (continued)
Option Description To Change
Ta b l e 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.