1-10
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5
OL-23092-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Networking Protocols are Used?
Cisco Unified IP Phones support both IPv4 and an IPv6 address transparently, so users can handle all
calls on the phone to which they are accustomed. Cisco Unified IP Phones support the use of IPv6 only
with Cisco Unified Communications Manager release 7.1 and only with the Skinny Call Control Protocol
(SCCP).
Cisco Unified IP Phones do not support URLs with IPv6 addresses in the URL. This affects all IP Phone
Service URLs, including services, directories, messages, help, and any restricted web services that
require the phone to use the HTTP protocol to validate the credentials with the Authentication URL. If
you configure Cisco Unified IP Phone services for Cisco Unified IP Phones, you must configure the
phone and the servers that support the phone service with IPv4 addresses.
If you configure IPv6 Only as the IP Addressing Mode for phones that are running SIP, the Cisco TFTP
service overrides the IP Addressing Mode configuration and uses IPv4 Only in the configuration file.
For more information on deploying IPv6 in your Cisco Unified Communications network, refer to
Internet Protocol Version 6 (IPv6)
in
Cisco Unified Communications Manager Features and Services
Guide
and
Deploying IPv6 in Unified Communications Networks with Cisco Unified Communications
Manager
.
Related Topics
•
Understanding Interactions with Other Cisco Unified IP Communications Products, page 2-2
•
Understanding the Phone Startup Process, page 2-9
•
Network Configuration Menu, page 4-5