Separate Voice And Data Vlans; Single Voice And Data Vlan With Dot1P - Cisco WS C4224V 8FXS - 200Mbps Ethernet Switch Software Configuration Manual

Chapter 1 Product Overview

Separate Voice and Data VLANs

Single Voice and Data VLAN with dot1p

OL-2031-02
a CoS/ToS of 3 are placed into the highest priority Queues. If the queue has no
packets to be serviced, it will be skipped. WRED is not supported on the Fast
Ethernet ports.
The WRR default values cannot be changed. There are currently no CLI
commands to determine QoS information for WRR weights and queue mappings.
You cannot configure port-based QoS on the Layer 2 switch ports.
To be consistent with Cisco IP Telephony QoS design recommendations, you
should configure separate voice and data VLANs. The following sample
configuration shows how to configure separate voice and data VLANs.
interface FastEthernet5/22
no ip address
duplex auto
speed auto
switchport access vlan 60
switchport voice vlan 160
snmp trap link-status
Packets arriving on the specified voice VLAN will automatically have the 802.1p
priority values read on ingress. Unlike the Catalyst 3500, trunking mode does not
have to be used to distinguish between a voice and a data VLAN on a single port.
If the voice and data VLAN must be the same (a single subnet), using the dot1p
extension will enable the Catalyst 4224 to recognize the dot 1p CoS value from
the IP phone and place the packet in a queue based on the 802.1p value. The
following sample configuration shows how to configure a single voice and data
VLAN with dot1p.
interface FastEthernet5/23
no ip address
duplex auto
speed auto
switchport access vlan 160
switchport voice vlan dot1p
Catalyst 4224 Access Gateway Switch Software Configuration Guide
Application Notes
1-15