Cisco Unified Ip Phone 8961, 9951, And 9971 Administration Guide For Cisco Unified Communications Manager - Cisco 9971 Administration Manual

Network protocol
Internet Protocol (IP)
Link Layer Discovery Protocol
(LLDP)
Link Layer Discovery
Protocol-Media Endpoint
Devices (LLDP-MED)
Real-Time Transport Protocol
(RTP)
Purpose
IP is a messaging protocol that addresses and sends packets
across the network.
LLDP is a standardized network discovery protocol (similar
to CDP) that is supported on some Cisco and third-party
devices.
LLDP-MED is an extension of the LLDP standard for voice
products.
RTP is a standard protocol for transporting real-time data,
such as interactive voice and video, over data networks.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0

Network Protocols
Usage notes
To communicate using IP, network
devices must have an assigned IP
address, subnet, and gateway.
IP addresses, subnets, and gateway
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.
The Cisco Unified IP Phones
support IPv6 addresses. For more
information, see Cisco Unified
Communications Manager
Features and Services Guide,
"Internet Protocol Version 6
(IPv6)" chapter.
The Cisco Unified IP Phone
supports LLDP on the PC port.
The Cisco Unified IP Phone
supports LLDP-MED 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/technologies_white_
paper0900aecd804cd46d.shtml
Cisco Unified IP Phones use the
RTP protocol to send and receive
real-time voice traffic from other
phones and gateways.
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