Cisco Systems 7970G What Networking Protocols Are Used?, Networking Protocol Purpose Usage Notes

Chapter 1 An Overview of the Cisco Unified IP Phone

What Networking Protocols Are Used?

What Networking Protocols Are Used?

Cisco Unified IP Phones support several industry-standard and Cisco networking protocols required for voice communication. Table 1-1provides an overview of the networking protocols that the Cisco Unified IP Phones 7970G/7971G-GE supports.

Table 1-1	Supported Networking Protocols on the Cisco Unified IP Phone
Networking Protocol		Purpose	Usage Notes
Bootstrap Protocol		BootP enables a network device such	If you are using BootP to assign IP
(BootP)		as the Cisco Unified IP Phone to	addresses to the Cisco
		discover certain startup information,	Unified IP Phone, the BOOTP
		such as its IP address.	Server option shows “Yes” in the
			network configuration settings on the
			phone.
Cisco Discovery		CDP is a device-discovery protocol	The Cisco Unified IP Phone uses
Protocol (CDP)		that runs on all Cisco-manufactured	CDP to communicate information
		equipment.	such as auxiliary VLAN ID, per port
		Using CDP, a device can advertise its	power management details, and
		existence to other devices and	Quality of Service (QoS) configuration
			information with the Cisco Catalyst
		receive information about other
			switch.
		devices in the network.
Dynamic Host		DHCP dynamically allocates and	DHCP is enabled by default. If
Configuration Protocol		assigns an IP address to network	disabled, you must manually
(DHCP)		devices.	configure the IP address, subnet
		DHCP enables you to connect an IP	mask, gateway, and a TFTP server on
			each phone locally.
		phone into the network and have the
		phone become operational without	Cisco recommends that you use
		you needing to manually assign an IP	DHCP custom option 150. With this
		address or to configure additional	method, you configure the TFTP
		network parameters.	server IP address as the option value.
			For additional supported DCHP
			configurations, refer to Cisco
			Unified CallManager System Guide.

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones

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