Chapter - Cisco 7975G Software Manual

Network Protocols
Network protocol
IEEE 802.1X
Internet Protocol (IP)
Link Layer Discovery
Protocol (LLDP)
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
8
Purpose
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 authenticates, 802.1X
access control allows only Extensible
Authentication Protocol over LAN
(EAPOL) traffic through the port to
which the client connects. After
authentication is successful, normal
traffic can pass through the port.
IP is a messaging protocol that
addresses and sends packets across
the network.
LLDP is a standardized network
discovery protocol (similar to CDP)
that some Cisco and third-party
devices support.
Cisco Unified IP Phone
Usage notes
The Cisco Unified IP Phone implements
the IEEE 802.1X standard by supporting
the following authentication methods:
EAP-FAST, EAP-TLS, and EAP-MD5.
When 802.1X authentication is enabled
on the phone, you should disable the PC
port and voice VLAN. See 802.1X
Authentication, on page 21
additional information.
To communicate by using IP, network
devices must have an assigned IP
address, subnet, and gateway.
IP addresses, subnets, and gateways
identifications are automatically assigned
if you use the Cisco Unified IP Phone
with Dynamic Host Configuration
Protocol (DHCP). If you do not use
DHCP, you must manually assign these
properties to each phone locally.
The Cisco Unified IP Phone supports
concurrent IPv4 and IPv6 addresses.
Configure the IP addressing mode (IPv4
only, IPv6 only, or both IPv4 and IPv6)
in Cisco Unified Communications
Manager Administration. For more
information, see the "Internet Protocol
Version 6 (IPv6)" chapter in the Cisco
Unified Communications Manager
Features and Services Guide.
The Cisco Unified IP Phone supports
LLDP on the PC port.
for