What Networking Protocols Are Used - Cisco 7960G Administration Manual

Chapter 1 An Overview of the Cisco IP Phone

What Networking Protocols Are Used?

Table 1-1 Supported Networking Protocols on the Cisco IP Phone
Networking Protocol
Bootstrap Protocol
(BootP)
Cisco Discovery
Protocol (CDP)
Dynamic Host
Configuration Protocol
(DHCP)
Cisco IP Phone Administration Guide for Cisco CallManager 4.0, Cisco IP Phones 7960G/7940G
OL-4825-01
Cisco IP Phones support several industry-standard and Cisco networking
protocols required for voice communication.
the networking protocols that the Cisco IP Phone models 7960G and 7940G
support.
Purpose
BootP enables a network device such
as the Cisco IP Phone to discover
certain startup information, such as
its IP address.
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.
DHCP dynamically allocates and
assigns an IP address to network
devices.
DHCP enables you to connect an IP
phone into the network and have it
become operational without you
needing to manually assign an IP
address or configure additional
required network parameters.
What Networking Protocols Are Used?
Table 1-1 provides an overview of
Usage Notes
If you are using BootP to assign IP
addresses to the Cisco IP Phone, the
BOOTP Server option shows "Yes"
in the network configuration settings
on the phone.
The Cisco IP Phone uses 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.
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.
Cisco recommends that you use
DHCP custom option 150. With this
method, you configure the TFTP
server IP address as the option value.
For additional supported DCHP
configurations, refer
Cisco CallManager System Guide.
1-5