Defines the time in seconds for which a client may use this DNS server for name resolution.
- SNMP ID:
 - 2.70.2.5.5
 - Console path:
 - Setup > IPv6 > Router-Advertisement > RDNSS-Options
 - Possible values:
 0 … 65535
- Special values:
 - 0
 - Discontinuation
 
- Default:
 - 900