Cisco Catalyst 4500 Series Software Configuration Guide

46-3
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 46 Configuring Voice Interfaces
Configuring Voice Ports for Voice and Data Traffic
• Voice traffic is given a higher priority by the phone (CoS priority is always 5), and all traffic is in
the same VLAN.
• Voice and data traffic are carried on separate VLANs.
To configure a port to instruct the phone to give voice traffic a higher priority and to forward all traffic
using the 802.1Q native VLAN, perform this task:
Configuring Voice Ports for Voice and Data Traffic
Because voice and data traffic can travel using the same voice port, you should specify a different VLAN
for each type of traffic. You can configure a switch port to forward voice and data traffic on different
VLANs.
Note For information on configuring sticky port security on voice VLANs, see the “Configuring Port Security
on Voice Ports” section on page 55-22.
Note For information on using 802.1X with voice VLANs, see the “Using 802.1X with Voice VLAN Ports”
section on page 49-21.
To configure a port to receive voice and data traffic from a Cisco IP phone on different VLANs, perform
this task:
Command Purpose
Step 1
Switch# configure terminal
Enters configuration mode.
Step 2
Switch(config)# interface {fastethernet |
gigabitethernet} slot/port
Specifies the interface to configure.
Step 3
Switch(config-if)# switchport voice vlan dot1p
Instructs the switch to use 802.1p priority tagging for voice
traffic and to use VLAN 1 (default native VLAN) to carry
all traffic.
Step 4
Switch(config-if)# end
Returns to privileged EXEC mode.
Step 5
Switch# show interface {fastethernet |
gigabitethernet} slot/port switchport
Verifies the port configuration.
Command Purpose
Step 1
Switch# configure terminal
Enters configuration mode.
Step 2
Switch(config)# interface {fastethernet |
gigabitethernet} slot/port
Specifies the interface to configure.
Step 3
Switch(config-if)# switchport mode access
Configures the interface as an access port.
The voice VLAN is active only on access ports.
Step 4
Switch(config-if)# switchport voice vlan
vlan_num
Instructs the Cisco IP phone to forward all voice traffic
through a specified VLAN. The Cisco IP phone forwards
the traffic with an 802.1p priority of 5.
Step 5
Switch(config-if)# switchport access vlan
data_vlan_num
Configures the access VLAN (the data VLAN) on the port.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E