Cisco CP-7975G Administration Guide - Page 21

Chapter 1 An Overview of the Cisco Unified IP Phone What Networking Protocols are Used? Table 1-2 Supported Networking Protocols on the Cisco Unified IP Phone (continued) Networking Protocol IEEE 802.1X Internet Protocol (IP) Link Layer Discovery Protocol (LLDP) Purpose Usage Notes 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 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. Refer to Supporting 802.1X Authentication on Cisco Unified IP Phones, page 1-19 for additional information. IP is a messaging protocol that addresses and To communicate using IP, network devices sends packets across the network. 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. The Cisco Unified IP Phone supports concurrent IPv4 and IPv6 addresses. Configure the IP addressing mode (IPv4 only, IPv6 only, and both IPv4 and IPv6) in Cisco Unified Communications Manager Administration. For more information, refer to Internet Protocol Version 6 (IPv6) in the Cisco Unified Communications Manager Features and Services Guide. LLDP is a standardized network discovery The Cisco Unified IP Phone supports LLDP protocol (similar to CDP) that is supported on on the PC port. some Cisco and third-party devices. OL-23092-01 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5 1-7