User's Manual
Table Of Contents
- Getting Started
- Wizards
- Using the Startup Wizard
- Using the Wireless Wizard to Configure the Wireless Settings for ISA550W and ISA570W
- Using the DMZ Wizard to Configure the DMZ Settings
- Using the Dual WAN Wizard to Configure the WAN Redundancy Settings
- Using the Site-to-Site Wizard to Establish the Site-to-Site VPN Tunnels
- Using the Remote Access Wizard to Establish the IPSec VPN Tunnels or SSL VPN Tunnels for Remote Access
- Status
- Networking
- Configuring IP Routing Mode
- Port Management
- Configuring the WAN
- Configuring the WAN Redundancy
- Configuring the VLAN
- Configuring the DMZ
- Configuring the Zones
- Configuring the Routing
- Dynamic DNS
- IGMP
- VRRP
- Configuring the Quality of Service
- Address Management
- Service Management
- Wireless Configuration for ISA550W and ISA570W
- Firewall
- Configuring the Firewall Access Rules to Control Inbound and Outbound Traffic
- Configuring the Firewall Schedule
- Firewall Access Rule Configuration Examples
- Configuring the NAT Rules to Securely Access a Remote Network
- Configuring the Session Settings
- Configuring the Content Filtering to Control Access to Internet
- Configuring the MAC Filtering to Permit or Block Traffic
- Configuring the IP/MAC Binding to Prevent Spoofing
- Configuring the Attack Protection
- Configuring the Application Level Gateway
- Security Services
- VPN
- About VPN
- Configuring the Cisco IPSec VPN Server
- Configuring the Cisco IPSec VPN Client
- Configuring the Site-to-Site VPN
- Configuring the SSL VPN
- Elements of the SSL VPN
- Configuration Tasks to Establish a SSL VPN Tunnel
- Installing the Cisco AnyConnect VPN Client on User’s PC
- Importing the Certificates for User Authentication
- Configuring the SSL VPN Users
- Configuring the SSL VPN Gateway
- Configuring the SSL VPN Group Policies
- Configuring the SSL VPN Portal
- Configuring the L2TP Server
- Configuring the VPN Passthrough
- Viewing the VPN Status
- User Management
- Device Management
- Remote Management
- Administration
- SNMP
- Configuration Management
- Firmware Management
- Log Management
- Managing the Security License
- Managing the Certificates for Authentication
- Configuring the Email Alert Settings
- Configuring the RADIUS Servers
- Configuring the Time Zone
- Device Discovery
- Diagnosing the Device
- Measuring and Limiting Traffic with the Traffic Meter
- Configuring the ViewMaster
- Configuring the CCO Account
- Configuring the Device Properties
- Configuring the Debug Settings
- Troubleshooting
- Technical Specifications and Environmental Requirements
- Factory Default Settings
- Where to Go From Here
Networking
Configuring the WAN Redundancy
Cisco ISA500 Series Integrated Security Appliance Administrator Guide 113
4
NOTE When the security appliance is working in Dual WAN mode, if one WAN link is down,
the WAN redundancy and Policy-based Routing settings are ignored and all traffic
is handled by the active WAN port.
This section describes how to configure the WAN redundancy and the link failover
detection settings. It includes the following topics:
• Loading Balancing for WAN Redundancy, page 113
• Load Balancing with Policy-based Routing Configuration Example,
page 115
• Failover for WAN Redundancy, page 116
• Routing Table for WAN Redundancy, page 117
• Configuring the Link Failover Detection, page 117
Loading Balancing for WAN Redundancy
The Load Balancing can segregate traffic between links that are not of the same
speed. For example, you can bind the high-volume services through the port that
is connected to a high speed link, and bind the low-volume services to the port
that is connected to the slower link.
The Load Balancing is implemented for outgoing traffic and not for incoming traffic.
To maintain better control of WAN port traffic, consider making the WAN port
Internet address public and keeping the other one private.
Figure?2 shows an example of Dual WAN configured with the Load Balancing.
Figure 2 Example of Dual WAN Ports with Load Balancing
ISA500
yourcompany2.dyndns.org
yourcompany1.dyndns.org
Internet
Dual WAN Ports (Load Balancing)
WAN2 IP
WAN1 IP
197402