Cisco 7912G Administration Guide - Page 31
What Networking Protocols Are Used - tftp
UPC - 746320852409
View all Cisco 7912G manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 31 highlights
Chapter 1 An Overview of the Cisco IP Phone What Networking Protocols Are Used? What Networking Protocols Are Used? Cisco IP Phones support several industry-standard and Cisco networking protocols for voice communication. Table 1-1 provides an overview of the networking protocols that the Cisco IP Phone models 7902G/7905G/7912G supports. Table 1-1 Supported Networking Protocols on the Cisco IP Phone Networking Protocol Cisco Discovery Protocol (CDP) Dynamic Host Configuration Protocol (DHCP) Purpose Usage Notes 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 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. 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 you 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 an 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 DCHP configurations, see Cisco CallManager System Guide. Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G OL-6313-01 1-7