Cisco CP-7975G Administration Guide - Page 20

What Networking Protocols are Used? Chapter 1 An Overview of the Cisco Unified IP Phone 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 Phones 7975G, 7971G-GE, 7970G, 7965G, and 7945G support. Table 1-2 Supported Networking Protocols on the Cisco Unified IP Phone Networking Protocol Purpose Usage Notes Bootstrap Protocol (BootP) 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. Cisco Discovery Protocol (CDP) 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. Cisco Peer-to-Peer Distribution Protocol (CPPDP) 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. 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 needing to manually assign an IP address or 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. Hypertext Transfer Protocol (HTTP) HTTP is the standard way of transferring Cisco Unified IP Phones use HTTP for the information and moving documents across the XML services and for troubleshooting Internet and the web. 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. Hypertext Transfer Protocol Secure (HTTPS) Hypertext Transfer Protocol Secure (HTTPS) is a combination of the Hypertext Transfer Protocol with the SSL/TLS protocol to provide encryption and secure identification of servers. Web applications with both HTTP and HTTPS support have two URLs configured. Cisco Unified IP Phone that support HTTPS choose the HTTPS URL out of the two URLs. Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5 1-6 OL-23092-01