Cisco 7911G - IP Phone VoIP Administration Manual page 24

What Networking Protocols Are Used?
Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol
Dynamic Host
Configuration Protocol
(DHCP)
HyperText Transfer
Protocol (HTTP)
IEEE 802.1X
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
1-6
Purpose
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
you 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
World Wide Web.
The IEEE 802.1X standard defines a
client-server-based access control
and authentication protocol that
restricts unauthorized clients from
connecting to a LAN through
publicly accessible ports.
Until the client is authenticated,
802.1X access control allows only
Extensible Authentication Protocol
over LAN (EAPOL) traffic through
the port to which the client is
connected. After authentication is
successful, normal traffic can pass
through the port.
Chapter 1 An Overview of the Cisco Unified IP Phone
Usage Notes
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 information about
DHCP configurations, refer to the
"Cisco TFTP" chapter in the
Cisco Unified Communications
Manager System Guide.
The Cisco Unified IP Phones use
HTTP for the XML services and for
troubleshooting purposes.
The Cisco Unified IP Phone
implements the IEEE 802.1X
standard by providing support for the
EAP-MD5 option for 802.1X
authentication.
When 802.1X authentication is
enabled on the phone, you should
disable the PC port and voice VLAN.
See the "Supporting 802.1X
Authentication on Cisco Unified IP
Phones" for additional information.
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