ZyXEL 35 Guia Do Utilizador

 

 

All contents copyright (c) 2006 ZyXEL Communications Corporation.   

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This feature is for ZyWALL 35 & 70 only since ZyWALL 5 has only one WAN interface. There are two 

operation modes for dual WAN. The “Active/Passive” is for fail-over and fall-back. And the 

“Active/Active” is not only for fail-over and fall-back, but also can perform load balancing to make 

outgoing traffic will be processed efficiently. 

 

With ZyWALL’s Active/Passive mode, users can achieve backup of Internet connectivity, so when the 

primary WAN (normally it’s lower-cost) is down, the secondary WAN (normally it’s higher-cost) can take 

over the connectivity job. 

This section describes how to use ZyWALL’s WAN backup feature to let ZyWALL’s Internet connectivity 

always available including LAN users’ Internet access and DMZ servers’ availability.   

Following is an example of a possible network topology. Company A has two Internet access methods, one is 

ADSL, the other is ISDN. Since cost for ADSL is lower than ISDN, so the MIS decides to use ADSL for 

general Internet Access and ISDN for backup.   

Condition:   ZyWALL gets one public IP address