Cisco 7962G Administration Guide - Page 19

Chapter 1 An Overview of the Cisco Unified IP Phone What Networking Protocols are Used? Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued) Networking Protocol IEEE 802.1X Internet Protocol (IP) Link Layer Discovery Protocol (LLDP) Link Layer Discovery Protocol-Media Endpoint Devices (LLDP-MED) Cisco Peer to Peer Distribution Protocol (CPPDP) Real-Time Transport Protocol (RTP) 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 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. IP is a messaging protocol that addresses To communicate using IP, network devices must and sends packets across the network. 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. LLDP is a standardized network discovery The Cisco Unified IP Phone supports LLDP on the protocol (similar to CDP) that is supported PC port. on some Cisco and third-party devices. LLDP-MED is an extension of the LLDP The Cisco Unified IP Phone supports LLDP-MED standard developed for voice products. on the SW port to communicate information such as: • Voice VLAN configuration • Device discovery • Power management • Inventory management For more information about LLDP-MED support, see the LLDP-MED and Cisco Discovery Protocol white paper: http://www.cisco.com/en/US/tech/tk652/tk701/tech nologies_white_paper0900aecd804cd46d.shtml CPPDP is a Cisco proprietary protocol used to form a peer to peer hierarchy of devices. CPPDP is also used to copy firmware or other files from peer devices to neighboring devices. CPPDP is used by the Peer Firmware Sharing feature. RTP is a standard protocol for transporting Cisco Unified IP Phones use the RTP protocol to real-time data, such as interactive voice send and receive real-time voice traffic from other and video, over data networks. phones and gateways. OL-14625-01 Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 6.1 1-5