Alternate DNS servers

The alternate DNS servers are used only when DNS resolution of the primary or secondary DNS servers return a name error (NXDOMAIN). They are not used as failover DNS servers. If the query in the primary list times out, no alternate DNS server is contacted.

To configure the alternate DNS servers:

config system dns
    set alt-primary <ip_address>
    set alt-secondary <ip_address>
end

alt-primary <ip_address>	Alternate primary DNS server. This is not used as a failover DNS server.
alt-secondary <ip_address>	Alternate secondary DNS server. This is not used as a failover DNS server.