Cisco IP Phone Administration Manual page 87

Chapter 4 Configuring Settings on the Cisco Unified IP Phones
Table 4-4 IPv6 Configuration Menu Options (continued)
Option
IPv6 DNS Server 1
IPv6 DNS Server 2
DHCPv6 Address
Released
IPv6 Alternate TFTP
OL-23091-01
Description
Primary Domain Name System (DNS) server 
(DNS Server 1) and optional backup DNS servers (DNS
Server 2) used by the phone.
If your configuration includes both DNSv6 and DNSv4
servers, the phone will look for its DNS server in the
following order:
IPv6 DNS Server 1
1.
2. IPv6 DNS Server 2
3. DNS Server 1-5 for IPv4 (respectively)
Releases the IPv6 address that the phone has acquired
from the DHCPv6 server or by stateless address
autoconfiguration.
This field is only editable when the DHCPv6
Note
option is enabled.
Indicates whether the phone is using the IPv6 Alternate
TFTP server.
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
Network Configuration Menu
To Change
Unlock network configuration
1.
options.
Set the DHCPv6 option to No.
2.
Scroll to the appropriate DNS
3.
Server option, press the Edit
softkey, and then enter a new
DNS server IP address.
4. Press the Validate softkey.
5. Repeat Steps 3 and 4 as needed to
assign the backup DNS server.
Press the Save softkey.
6.
Unlock network configuration
1.
options.
Scroll to the DHCPv6 Address
2.
Released option and press the
Yes softkey to release the IP
address assigned by DHCP, or
press the No softkey if you do not
want to release this IP address.
Press the Save softkey.
3.
Unlock network configuration
1.
options.
Scroll to the IPv6 Alternate TFTP
2.
option and press the Yes softkey
if the phone should use an
alternative TFTP server.
Press the Save softkey.
3.
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