Operation Manual
Vigor2133 Series User’s Guide 
45
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V
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1
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Click Diagnostics and click DNS Cache Table to open the web page.   
The record of domain Name and the mapping IP address for answering the DNS query from 
LAN will be stored on Vigor router’s Cache temporarily and displayed on Diagnostics >> DNS 
Cache Table. 
Available settings are explained as follows: 
Item Description 
Clear  Click this link to remove the result on the window. 
Refresh  Click it to reload the page. 
When an entry’s TTL is 
larger than…. 
Check the box the type the value of TTL (time to live) for 
each entry. Click OK to enable such function. 
It means when the TTL value of each DNS query reaches the 
threshold of the value specified here, the corresponding 
record will be deleted from router’s Cache automatically. 










