TP-LINK TL-ER5120 User Manual

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Timing: 
Link Backup will be enabled if the specified effective time is reached. All the 
traffic on the primary WAN will switch to the backup WAN at the beginning of 
the effective time; the traffic on the backup WAN will switch to the primary 
WAN at the ending of the effective time. 
Failover: 
Specify the premise for Failover Mode. The backup WAN port will be enabled 
only when the premise is met.   
Backup 
Effective Time: 
Specify the backup effective time if Timing Mode has been selected. Then the 
backup WAN port will be enabled, while the primary WAN port is disabled in 
the specified time period. When the start time you enter is not earlier than the 
end time, the default effective time is from the start time of the day to the end 
time of the next day.         
Status 
Activate or inactivate the entry. 
¾
  List of Rules 
 
You can view the information of the entries and edit them by the Action buttons. 
The first entry in Figure 3-40 indicates: WAN1 is the primary port and WAN2 is the backup port. WAN2 
will be enabled while WAN1 is failed. This entry is enabled. 
Note: 
The same WAN port cannot be added to the primary and secondary WAN lists at the same time, and 
one WAN port should be added to only one list. 
3.3.4.4 
Protocol 
On this page, you can specify the protocol for routing rules conveniently. A protocol constitutes of the 
name and number. The Router predefines three commonly used protocols such as TCP, UDP and 
TCP/UDP. Moreover, you can also add new protocols as your wish.       
Choose the menu Advanced→Load Balance→Protocol to load the following page.