Cisco recommends IPv4 and IPv6 as the setting for the phone addressing mode. IPv6 Only is not
recommended for production environments.
Note
IPv6 Setup menu fields
The IPv6 Setup menu is a submenu of Network settings and is accessed from the Administrator Settings menu.
•
For Cisco Unified IP Phones 8961 and 9951: navigate to the IPv6 options from
Administrator Settings
>
Ethernet Setup
>
IPv6 Setup
.
•
For Cisco Unified IP Phone 9971 with Wi-Fi disabled on the Cisco Unified Communications Manager:
navigate to the IPv6 options from
Administrator Settings
>
Ethernet Setup
>
IPv6 Setup
.
•
For Cisco Unified IP Phone 9971 with Wi-Fi enabled on the Cisco Unified Communications Manager:
navigate to
Administrator Settings
>
Network Setup
>
Wireless Setup
>
IPv6 Setup
.
The following table describes the IPv6 related information found in the IPv6 menu.
Table 18: IPv6 Setup menu options
Description
Default value
Option
Allows the user to enable or disable DHCPv6.
When DHCPv6 is enabled, the DHCPv6 server assigns the phone
an IPv6 address. When DHCPv6 is disabled, the administrator
must assign the IPv6 address.
Unlike DHCPv4, even DHCPv6 is disabled the phone
can still generate a Stateless address autoconfiguration
(SLAAC) address if autoconfigure is enabled.
Note
Yes
DHCPv6 Enabled
Displays the current IPv6 address of the phone or allows the user
to enter a new IPv6 address.
Two address formats are supported:
•
Eight sets of hexadecimal digits separated by colons
X:X:X:X:X:X:X:X
•
Compressed format to collapse a single run of consecutive
zero groups into a single group represented by a double
colon.
If the IP address is assigned with this option, you must also assign
the IPv6 prefix length and the default router.
::
IPv6 Address
Displays the current prefix length for the subnet or allows the
user to enter a new prefix length.
The subnet prefix length is a decimal value from 1-128.
0
IPv6 Prefix Length
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
120
Cisco Unified IP Phone Settings
IPv6 Setup menu fields
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