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Network Management and Monitoring

  • Support for ephemeral database cyclic versioning and resizing (PTX10001-36MR, PTX10003, PTX10004, PTX10008, PTX10016, QFX5130-32CD, and QFX5220)—Starting in Junos OS Evolved Release 23.2R1, Junos devices implement cyclic versioning and database resizing to more effectively manage the space used by the ephemeral configuration database. The cyclic version value defines the number of versions of an ephemeral database for which the system stores deleted configuration objects. During a commit operation, the system reclaims the space occupied by objects deleted in the previous database version relative to the current database version as determined by the cyclic version value. You can also configure the device to resize the database when its size exceeds certain thresholds. With effective space management, you can prevent the database from hitting the maximum database size and improve performance by reducing database fragmentation.

    [See Managing Ephemeral Configuration Database Space.]

  • Improved traffic throughput in gRIBI VRF instance fallback scenarios (PTX10001-36MR, PTX10008, and PTX10016)—In Junos OS Evolved Release 23.2R1, we've improved the throughput of traffic on fallback routes programmed by the gRIBI API in virtual routing and forwarding (VRF) instances. We support this feature when the primary route in the traffic engineering VRF instance has an IPv4 host prefix length of exactly 32 or an IPv6 host prefix length of exactly 128.

    [See gRIBI.]

  • SNMP support for PFC, ECN, and CoS ingress packet drop accounting (QFX5220)—Junos OS Evolved Release 23.2R1 introduces SNMP support that helps to account for the packets that are dropped because of ingress port congestion. You can view and export the error counters data for explicit congestion notification (ECN), ingress drops, and priority-based flow control (PFC) using the following commands:

    • show snmp mib walk ifJnxTable

    • show snmp mib walk jnxCosPfcPriorityTable.

    [See SNMP MIBs and Traps Supported by Junos OS and Junos OS Evolved and show snmp mib.]

  • Support for sFlow debugging & traceability (PTX10001-36MR, PTX10004, PTX10008, and PTX10016)—Starting in Junos OS Evolved Release 23.2R1, we've implemented ingress and egress sFlow functionalities for both IPv6 and IPv6-in-IPv4 traffic. This feature extends the sFlow capabilities for ECMP of IPv4-in-IPv4 and IPv6-in-IPv4 traffic as well.

    We support this sFlow functionality only for transit nodes. In transit-only devices, the IPv6-in-IPv4 encapsulated packet can transit through the device without any modification. Alternatively, the packet may get de-encapsulated and forwarded or de-encapsulated and encapsulated and forwarded based on the next-hop configuration.

    Additionally, the packet may traverse multiple VRF instances while getting forwarded. For all such variations, we support ingress and egress sFlow.

    [See sFlow Monitoring Technology.]