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Hierarchy Level


Allows you to configure DHCPv6 client preferred prefix length. If preferred-prefix-length is configured, the DHCPv6 client checks the prefix length in the ADVERTISE packet and if the check fails, a sysolg is created.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 12.3X48-D30 and in Junos OS Release 15.1X49-D100.

The logical-systems and tenants options are introduced in Junos OS Release 18.4R1.