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family inet

date_range 19-Nov-23

Syntax

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family inet {
    layer-3; 
    layer-4;
    session-id;
    symmetric-hash {
        complement;
    }
}

[edit forwarding-options hash-key]

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.

interface—To view this statement in the configuration.

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

Statement introduced before Junos OS Release 7.4.

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