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Hierarchy Level


Specify the IPv6 prefix length associated with a subscriber’s basic broadband bridging device that is subject to a limited number of sessions.

This feature is supported on MX Series routers equipped with MS-DPCs. Starting in Junos OS Release 18.2R1, this option is also supported on MS-MPCs and MS-MICs.



Subnet prefix representing the size of the subnet subject to session limitation.

  • Values: 56, 64, 96, 128

  • Default: 0—no limitation.

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 14.1.

Support added in Junos OS 20.2R1 for Next Gen Services on MX240, MX480, and MX960 routers.