Defines how the device advertises itself as the default gateway or router.
- SNMP ID:
 - 2.70.2.2.12
 - Console path:
 - Setup > IPv6 > Router-Advertisement > Interface-Options
 - Possible values:
 - Auto
 - As long as a WAN connection exists, the router sends a positive router lifetime in the router advertisement messages. The result is that a client uses this router as the default gateway. If there is no WAN connection, the router sets the router lifetime to "0". A client then stops using this router as the default gateway. This behavior is compliant with RFC 6204.
 - Always
 - The router lifetime is always positive—i.e. greater than "0"—irrespective of the WAN connection status.
 - Never
 - The router lifetime is always "0".
 
- Default:
 - Auto