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family inet


Hierarchy Level


Configure layer information for the load-balancing specification. Only the IPv4 protocol is supported.


family inet—Incorporate port data into the hash key for flow determination. By default, port data is ignored when determining flows.

  • layer-3—Incorporate Layer 3 (IP) data into the hash key. You must include the layer-3 statement. If you omit the layer-3 statement, the management process removes the hash-key statement from the configuration and the router behaves as if you specified layer-3.

    By default, or if you specify only the layer-3 statement, the router uses the following Layer 3 information in the packet header for per-flow load balancing:

    • Source IP address

    • Destination IP address

    • Protocol

    • Incoming interface index

  • layer-4—Incorporate Layer 4 Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) data into the hash key.

    If you include the layer-4 statement, the router uses the following Layer 4 information to load-balance:

    • Source port number

    • Destination port number

    • IP type of service

  • session-id—Include the session ID in the hash key.

  • symmetric-hash—Create the symmetric hash key with source and destination ports.

    • complement—Create the complement of the symmetric hash key.

Required Privilege Level

interface—To view this statement in the configuration.

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

Release Information

Statement introduced before Junos OS Release 7.4.