Casio ISA550WBUN3K9 manual Networking

Networking	4
Configuring the WAN

•DNS Detection: Choose this option to detect the WAN failure by looking up the DNS servers that you specify in the following fields:

-Default DNS Servers: Send the DNS query for www.cisco.com to the default WAN DNS server. If the DNS server can be detected, the network connection is active.

-Specify DNS Servers: Send the DNS query for www.cisco.com to the specified DNS servers. Enter the IP addresses in the Primary WAN DNS Server and Secondary WAN DNS Server fields. If the primary or secondary DNS server can be detected, the network connection is active.

STEP 2 Click Save to apply your settings.

Load Balancing with Policy-Based Routing Configuration

Example

Use Case: A customer has two lines, one is a cable link and another is a DSL link. The majority of traffic goes through the cable link since it has larger bandwidth, and the rest traffic goes through the DSL link. As lots of secure websites (such as bank, or online shopping) are sensitive to flip flop the source IP address, let traffic for https, ftp, video, and game go through the cable link.

Solution: Complete the following configuration tasks:

•Configure a configurable port as the secondary WAN (WAN2). See Configure a secondary WAN, page 125.

•Connect the cable modem to the primary WAN port (WAN1) and connect the DSL modem to the secondary WAN port (WAN2).

•Enable the Weighted Dual WAN Settings and set the weighted value of WAN1 to 80% and the weighted value of WAN2 to 20%. See Dual WAN Settings, page 130.

•Enable the Policy-Based Routing feature and configure the Policy-Based Routing rules so that traffic for HTTPS, FTP, video, and game is directed to WAN1. See Configuring Policy-Based Routing, page 153.

•(Optional) Enable the Usage reports and the WAN Bandwidth reports so that you can view the network bandwidth usage. See Usage Reports, page 92 and WAN Bandwidth Reports, page 94.

Cisco ISA500 Series Integrated Security Appliances Administration Guide 133