Set the prefix for this route. This should not exceed 64 bits in length if it is to be used for auto-configuration.
- SNMP ID:
 - 2.70.2.3.2
 - Console path:
 - Setup > IPv6 > Router-Advertisement > Route-Options
 - Possible values:
 Max. 43 characters from [A-Z][a-z][0-9]/:
- Default:
 - empty