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Cisco Wireless LAN Solution Product Guide
OL-7955-01
Chapter 1 Overview
Cisco Wireless LAN Controllers
Figure 1-8 Physical Network Connections to 4402 and 4404 Series Controllers
Cisco 4100 Series Wireless LAN Controller VPN/Enhanced Security Module
All Cisco 4100 Series Wireless LAN Controllers can be equipped with an optional VPN/Enhanced
Security Module (AIR-VPN-4100), which slides into the rear panel of the Cisco 4100 Series Wireless
LAN Controller. The VPN/Enhanced Security Module adds significant hardware encryption
acceleration to the Cisco 4100 Series Wireless LAN Controller, which enables the following through the
management interface:
• Provide a built-in VPN server for mission-critical traffic.
• Sustain up to 1 Gbps throughput with Layer 2 and Layer 3 encryption enabled.
• Support high-speed, processor-intensive encryption, such as L2TP, IPSec and 3DES.
Figure 1-9 shows the VPN/Enhanced Security Module sliding into the rear of a Cisco 4100 Series
Wireless LAN Controller.
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