Sample Configuration; Configuring Ethernet Ports To Support Ip Phones With Multiple Ports; Ip Addressing - Cisco WS C4224V 8FXS - 200Mbps Ethernet Switch Software Configuration Manual

Chapter 3 Configuring Ethernet Switching

Sample Configuration

Configuring Ethernet Ports to Support IP Phones with
Multiple Ports

IP Addressing

OL-2031-02
The Catalyst 4224 supports the use of an 802.1p-only option when configuring
the voice VLAN. Use this option to allow the IP phone to tag VoIP packets with
a CoS of 5 on the native VLAN, while all PC data traffic is sent untagged.
The following example shows a single subnet configuration for the Catalyst 4224
switch:
interface FastEthernet5/2
description Port to IP Phone in single subnet
switchport access vlan 40
switchport voice vlan dot1p
spanning-tree portfast
The Catalyst 4224 instructs the IP phone to generate an 802.1Q frame with a null
VLAN ID value but with an 802.1p value (default is CoS of 5 for bearer traffic).
The voice and data vlans are both 40 in this example.
You might want to use multiple ports to connect the IP phones (option 2 in
Figure 3-1) if any of the following conditions apply to your Cisco IP telephony
network:
You are connecting IP phones that do not have a second Ethernet port for
•
attaching a PC.
You want to create a physical separation between the voice and data
•
networks.
You want to provide in-line power easily to the IP phones without having to
•
upgrade the data infrastructure.
You want to limit the number of switches that need UPS power.
•
The recommended configuration for using multiple cables to connect IP phones
to the network is to use a separate IP subnet and separate VLANs for IP telephony.
Catalyst 4224 Access Gateway Switch Software Configuration Guide

Configuring Ethernet Ports to Support IP Phones with Multiple Ports

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