Specifications

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Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Chapter 1 Product Overview
Configuration Guidelines
Separate VLAN for Voice and Data
Unlike the Catalyst 3500, you do not need to preconfigure VLANs with a VLAN
database command. To be consistent with Cisco IP Telephony QoS design
guidelines, you should configure a separate VLAN for voice and data. The
following example shows a recommended configuration.
interface FastEthernet5/22
no ip address
duplex auto
speed auto
switchport access vlan 60
switchport voice vlan 160
snmp trap link-status
spanning-tree portfast
This sample configuration instructs the IP phone to generate a packet with an
802.1q VLAN ID of 160 and an 802.1p value of 5 (default for voice bearer
traffic).
Note Portfast is supported only on nontrunk ports.
Port Configuration for a Single Subnet
If you have only a single subnet available, use the same subnet for voice and data.
The following sample configuration shows a port configuration for a single
subnet.
interface FastEthernet5/23
no ip address
duplex auto
speed auto
switchport access vlan 160
switchport voice vlan dot1p
snmp trap link-status
spanning-tree portfast
This sample configuration instructs the IP phone to generate an 802.1 Q frame
with a null VLAN ID value and an 802.1p value (default is CoS of 5 for bearer
traffic). The voice VLAN and data VLAN are both 160 in this example.