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Cisco Unified IP Phone 7965G and 7945G Administration Guide for Cisco Unified Communications Manager 6.1(3)
OL-17755-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Networking Protocols Are Used?
Dynamic Host
Configuration Protocol
(DHCP)
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.
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 Cisco
Unified
Communications Manager System Guide.
Hypertext Transfer
Protocol (HTTP)
HTTP is the standard way of
transferring information and moving
documents across the Internet and the
web.
Cisco Unified IP Phones use HTTP for the XML services
and for troubleshooting purposes.
IEEE 802.1X 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.
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. Refer to the
“Supporting 802.1X Authentication on Cisco Unified IP
Phones” section on page 1-15 for additional information.
Internet Protocol (IP) IP is a messaging protocol that
addresses and sends packets across
the network.
To communicate using IP, network devices must have an
assigned IP address, subnet, and gateway.
IP addresses, subnets, and gateways identifications are
automatically assigned if you are using the Cisco
Unified
IP Phone with Dynamic Host Configuration
Protocol (DHCP). If you are not using DHCP, you must
manually assign these properties to each phone locally.
Link Layer Discovery
Protocol (LLDP)
LLDP is a standardized network
discovery protocol (similar to CDP)
that is supported on some Cisco and
third-party devices.
The Cisco Unified IP Phone supports LLDP on the PC port.
Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol Purpose Usage Notes
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