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Hierarchy Level


Specify the maximum number of entries that can be added to the Neighbor Discovery Protocol (NDP) IPv6 neighbor discovery cache for an interface. When this maximum is reached, no new entries are allowed.


  • 100,000 for M Series.

  • 75,000 for MX Series and QFX Series.

  • 20,000 for EX Series.



Maximum size of the neighbor discovery next-hop cache for an interface.

  • Range: 1 through 2,000,000 for MX Series or QFX Series.

  • Range: 1 through 700,000 for M Series.

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 15.1.