Specifications

Chapter 1 Product Overview
Application Notes
1-10
Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Note DES and 3DES software is controlled by U.S. export regulations on encryption
products. For additional details visit the following URL:
http://www.cisco.com/wwl/export/crypto/
Application Notes
This section contains the following topics:
• Architecture, page 1-10
• DSP Allocation, page 1-11
• InterVLAN Routing, page 1-14
• Quality of Service, page 1-14
• Layer 2 QoS, page 1-14
• Separate Voice and Data VLANs, page 1-15
• Single Voice and Data VLAN with dot1p, page 1-15
• Layer 3 QoS, page 1-16
• WAN QoS Queuing and Scheduling, page 1-16
• Summary of the Layer 3 WAN QoS Features, page 1-16
Architecture
The Catalyst 4224 consists of the following physical subsystems:
• Time-division multiplexing (TDM) subsystem—Two VIC/WIC/VWIC slots,
one VIC slot, a built-in high-density FXS module, and a TDM switch
• CPU subsystem—Supports routing functions and interfaces for the TDM and
switch subsystems
• Switch subsystem—24 10/100 Ethernet port switch with QoS and interfaces
to the CPU and power subsystems