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Network Address Translation (NAT)

  • Carrier-grade NAT J-Flow version 9 and IPFIX format (MX240, MX480, and MX960 with SPC3 card)—Starting in Junos OS Release 22.1R1, we’ve added new information elements in the NAT44/NAT64 session template record using J-Flow version 9 and IPFIX format. The new elements are:

    IANA IPFIX ID

    Field Name

    Size (bytes)

    Description

    136

    flowEndReason

    1

    Session termination Reason.

    231

    initiatorOctets

    8

    Number of Packet Bytes in the forward flow direction

    232

    responderOctests

    8

    Number of packets Bytes in the reverse flow direction

    [See Understanding NAT Event Logging in Flow Monitoring Format on an MX Series Router or NFX250 .]