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Class of Service

  • Classification based on outer IP DiffServ code point (DSCP) for the de-encapsulation tunnel interface (PTX10001-36MR and PTX10008)—By default, when a packet exits a tunnel, the terminating router removes the tunnel (outer) header and forwards the packet based on the classification in the inner header. Starting in Junos OS Evolved Release 23.2R1, on PTX10001-36MR and PTX10008 routers that act as an egress router for a tunnel, you can forward the packet based on the classification you assign to the outer header at the underlay (ingress) interface. To use this feature, you first set the no-default option at the [edit class-of-service interfaces ftin unit 0 classifiers] hierarchy level. You then assign the desired classifier to the underlay interface.

    [See Classification Based on Outer Header of Decapsulation Tunnel.]

  • Support for increased shared buffer pool (QFX5220)—By default, the QFX5220 switch allocates 44.42 MB of the total 64 MB of global buffer space to shared buffers. The switch allocates the remaining buffer space to dedicated buffers (ingress and egress). Starting in Junos OS Evolved Release 23.2R1, you can decrease the global dedicated buffer space from the default value. effectively increasing the global shared buffer space to up to 60 MB.

    You can also define a dedicated buffer profile to increase or decrease the dedicated buffer allocated to an individual port. This feature is particularly useful for decreasing dedicated buffer space on unused or down ports, thereby increasing dedicated buffer space available to active ports.

    [See Configuring Ingress and Egress Dedicated Buffers.]