IP address of the backup DNS name server. The workstation will use this DNS server if the first DNS server fails
Note: If no default or backup DNS server is defined, the device will assign the requesting workstation its own IP address in the relevant ARF network as (primary) DNS server. 
    - SNMP ID:
 - 2.10.20.8
 - Telnet path:
 - Setup > DHCP > Network-List
 - Possible values:
 Max. 16 characters from [0-9].
- Default:
 - 0.0.0.0