Cisco Ip Phone 8800 Series Administration Guide For Cisco Unified Communications Manager - Cisco 8811 Administration Manual

Network protocol
Bootstrap Protocol (BootP)
Cisco Audio Session Tunnel
(CAST)
Cisco Discovery Protocol (CDP)
Cisco Peer-to-Peer Distribution
Protocol (CPPDP)
Dynamic Host Configuration
Protocol (DHCP)
Hypertext Transfer Protocol
(HTTP)
Hypertext Transfer Protocol
Secure (HTTPS)
Purpose
BootP enables a network device, such as the Cisco IP Phone,
to discover certain startup information, such as the IP address.
The CAST protocol allows your phones and associated
applications to communicate with the remote IP Phones
without requiring changes to the signaling components.
CDP is a device-discovery protocol that runs on all
Cisco-manufactured equipment.
Using CDP, a device can advertise its existence to other
devices and receive information about other devices in the
network.
CPPDP is a Cisco proprietary protocol used to form a
peer-to-peer hierarchy of devices. This hierarchy is used to
distribute firmware files from peer devices to their
neighboring devices.
DHCP dynamically allocates and assigns an IP address to
network devices.
DHCP enables you to connect an IP phone into the network
and the phone to become operational without the need to
manually assign an IP address or to configure additional
network parameters.
HTTP is the standard way of transferring information and
moving documents across the Internet and the web.
Hypertext Transfer Protocol Secure (HTTPS) is a combination
of the Hypertext Transfer Protocol with the SSL/TLS protocol
to provide encryption and secure identification of servers.

Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager

Network Protocols
Usage notes
—
The Cisco IP Phone uses CAST as
an interface between CUVA and
Cisco Unified Communications
Manager using the Cisco IP Phone
as a SIP proxy.
The Cisco IP Phones use CDP to
communicate information such as
auxiliary VLAN ID, per port power
management details, and Quality
of Service (QoS) configuration
information with the Cisco Catalyst
switch.
CPPDP is used by the Peer
Firmware Sharing feature.
DHCP is enabled by default. If
disabled, you must manually
configure the IP address, subnet
mask, gateway, and a TFTP server
on each phone locally.
We recommend that you use
DHCP custom option 150. With
this method, you configure the
TFTP server IP address as the
option value. For more
information, see the documentation
for your particular Cisco Unified
Communications Manager release.
If you cannot use option
Note
150, you may try using
DHCP option 66.
Cisco IP Phones use HTTP for
XML services and for
troubleshooting purposes.
Web applications with both HTTP
and HTTPS support have two
URLs configured. Cisco IP Phones
that support HTTPS choose the
HTTPS URL.
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