Cisco 8831NR Administration Manual page 25

Cisco Unified IP Conference Phone 8831 and 8831NR
Table 6: Supported Networking Protocols on the Cisco Unified IP Conference Phone
Networking Protocol
Cisco Discovery Protocol (CDP)
Dynamic Host Configuration
Protocol (DHCP)
Hypertext Transfer Protocol
(HTTP)
Purpose
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
the phone become operational
without your needing 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.
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
Network Protocols
Usage Notes
The Cisco Unified IP Conference
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 DHCP configurations,
go to the "Dynamic Host
Configuration Protocol" chapter
and the "Cisco TFTP" chapter in
the Cisco Unified Communications
Manager System Guide.
If you cannot use option
Note
150, you may try using
DHCP option 66.
Cisco Unified IP Phones use HTTP
for:
• Configuration file downloads
• XML services
• Firmware upgrades
• Troubleshooting purposes
15