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Value Type


Default Value

This testvar’s default value is computed dynamically and may not always be the value below. Please see the testvar’s description for details.


This parameter specifies the IP address of the backup DNS server created by CDRouter.

If not defined, this testvar defaults to the next address after wanDnsServer. For example, if wanDnsServer is then wanBackupDnsServer would default to

Note: If this testvar is set to “” CDRouter will not create a backup DNS server. If all the WAN DNS servers are set to “” CDRouter’s DHCP server will exclude the DNS option in all responses.