Cisco CP-7961G Administration Guide - Page 19

Chapter 1 An Overview of the Cisco Unified IP Phone What Networking Protocols are Used? 16 Handset light strip Indicates an incoming call or new voice message. What Networking Protocols are Used? Cisco Unified IP Phones support several industry-standard and Cisco networking protocols required for voice communication. Table 1-2 provides an overview of the networking protocols that the Cisco Unified IP Phone 7962G and 7942G support. Table 1-2 Supported Networking Protocols on the Cisco Unified IP Phone Networking Protocol Bootstrap Protocol (BootP) Cisco Discovery Protocol (CDP) Cisco Peer-to-Peer Distribution Protocol (CPPDP) Dynamic Host Configuration Protocol (DHCP) Hypertext Transfer Protocol (HTTP) Purpose Usage Notes BootP enables a network device such as the Cisco Unified IP Phone to discover certain startup information, such as its IP address. If you are using BootP to assign IP addresses to the Cisco Unified IP Phone, the BOOTP Server option shows "Yes" in the network configuration settings on the phone. CDP is a device-discovery protocol that runs on all Cisco-manufactured equipment. Using CDP, a device can advertise its existence to other devices and receive information about other devices in the network. The Cisco Unified IP Phone uses CDP to communicate information such as auxiliary VLAN ID, per port power management details, and Quality of Service (QoS) configuration information with the Cisco Catalyst switch. 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. 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 supported DHCP configurations, refer to Dynamic Host Configuration Protocol and Cisco TFTP in the Cisco Unified Communications Manager System Guide. 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. Cisco Unified IP Phones do not support the use of IPv6 addresses in the URL. You cannot use a literal IPv6 address in the URL or a hostname that maps to an IPv6 address. OL-21011-01 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP) 1-5