ZyXEL ZyWALL 5 User Guide - Page 175
Traffic Redirect Priority metric
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Chapter 9 WAN Screens The following table describes the labels in this screen. Table 35 NETWORK > WAN > General LABEL DESCRIPTION Active/Passive (Fail Over) Mode Select the Active/Passive (fail over) operation mode to have the ZyWALL use the second highest priority WAN interface as a back up. This means that the ZyWALL will normally use the highest priority (primary) WAN interface (depending on the priorities you configure in the Route Priority fields). The ZyWALL will switch to the secondary (second highest priority) WAN interface when the primary WAN interface's connection fails. Fall Back to Primary WAN When Possible This field determines the action the ZyWALL takes after the primary WAN interface fails and the ZyWALL starts using the secondary WAN interface. Select this check box to have the ZyWALL change back to using the primary WAN interface when the ZyWALL can connect through the primary WAN interface again. Clear this check box to have the ZyWALL continue using the secondary WAN interface, even after the ZyWALL can connect through the primary WAN interface again. The ZyWALL continues to use the secondary WAN interface until it's connection fails (at which time it will change back to using the primary WAN interface if its connection is up. Active/Active Mode Select Active/Active Mode to have the ZyWALL use both of the WAN interfaces at the same time and allow you to enable load balancing. Load Balancing Algorithm Select Least Load First, Weighted Round Robin or Spillover to activate load balancing and set the related fields. Otherwise, select None. Refer to Section 9.2.2 on page 177 for load balancing configuration. WAN Interface to Local Host Mapping Timeout Select this option to have the ZyWALL send all of a local computer's traffic through the same WAN interface for the period of time that you specify (1 to 600 seconds). This is useful when a redirect server forwards a local user's request for a file and informs the file server that a particular WAN IP address is requesting the file. If the user's subsequent sessions came from a different WAN IP address, the file server would deny the request. This field is configurable only when you select Active/Active Mode and enable load balancing. Route Priority WAN1 WAN2 Traffic Redirect Dial Backup The default WAN connection is "1' as your broadband connection via the WAN interface should always be your preferred method of accessing the WAN. The ZyWALL switches from WAN interface 1 to WAN interface 2 if WAN interface 1's connection fails and then back to WAN interface 1 when WAN interface 1's connection comes back up. The default priority of the routes is WAN 1, WAN 2, Traffic Redirect and then Dial Backup: You have three choices for an auxiliary connection (WAN 2, Traffic Redirect and Dial Backup) in the event that your regular WAN connection goes down. If Dial Backup is preferred to Traffic Redirect, then type "14" in the Dial Backup Priority (metric) field (and leave the Traffic Redirect Priority (metric) at the default of "15"). The Dial Backup field is available only when you enable the corresponding dial backup feature in the Dial Backup screen. Connectivity Check Check Period The ZyWALL tests a WAN connection by periodically sending a ping to either the default gateway or the address in the Ping this Address field. Type a number of seconds (5 to 300) to set the time interval between checks. Allow more time if your destination IP address handles lots of traffic. Check Timeout Type the number of seconds (1 to 10) for your ZyWALL to wait for a response to the ping before considering the check to have failed. This setting must be less than the Check Period. Use a higher value in this field if your network is busy or congested. ZyWALL 5/35/70 Series User's Guide 175