Understanding How Cdp And Voip Work; Configuring Voip On A Switch; Voice-Related Cli Commands - Cisco WS-C6506 Software Manual

Understanding How CDP and VoIP Work

Understanding How CDP and VoIP Work
Cisco Discovery Protocol (CDP) was enhanced in software release 8.1(1) to facilitate backward
compatibility with the newer, higher-powered Cisco IP phones. With this enhanced CDP, a Cisco IP
phone can negotiate its power requirements to the switch within the CDP packet. The switch uses this
information to ensure that it does not oversubscribe the available power.
We recommend that you enable CDP on the switch so that the switch can correctly detect and supply
power to the IP phones that are connected to it. CDP is enabled on the Catalyst 6500 series switches by
default; however, you should confirm that CDP is enabled when setting up your VoIP network. For more
information on CDP, see

Configuring VoIP on a Switch

This section describes the command-line interface (CLI) commands and the procedures that are used to
configure the Catalyst 6500 series switch for VoIP operation:
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•
•
•
•
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For information on using automatic voice configuration, see the
Note
page
You must enable CDP on the Catalyst 6500 series switch port that is connected to the IP phone in order
Note
to communicate the auxiliary VLAN ID, per-port power management details, and quality of service
(QoS) configuration information.

Voice-Related CLI Commands

Table 55-3
Table 55-3 Voice-Related CLI Command Module and Platform Support
CLI Commands
Inline-power related commands
set port inlinepower
set inlinepower defaultallocation
show port inlinepower
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
55-10
Chapter 31, "Configuring CDP."
Voice-Related CLI Commands, page 55-10
Configuring Per-Port Power Management, page 55-11
Configuring the Auxiliary VLANs on Catalyst LAN Switches, page 55-20
Configuring the Access Gateways, page 55-23
Displaying the Active Call Information, page 55-29
Configuring QoS in the Cisco IP Phone 7960, page 55-31
Configuring a Trusted Boundary to Ensure Port Security, page 55-33
55-38.
lists the CLI commands that are described in the configuration procedures.
Ethernet Module
4
X
This is a switch-level command and does not affect the
individual modules.
X
Chapter 55
"Using SmartPorts" section on
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WS-X6608-T1/E1 WS-X6624-FXS
Configuring a VoIP Network
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