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Class of Service

  • Support for Routing-Instance based CoS Classifiers (PTX10001-36MR, PTX10003, PTX10004, PTX10008, and PTX10016)–Starting in Junos OS Evolved Release 22.4R1, you can apply class of service (CoS) classifiers to the routing instance on your PTX devices. This feature is for routing instances with VRF table labels enabled. Supported classifier types include:

    • MPLS EXP

    • DSCPv4

    • DSCPv6

    [See: classifiers (Routing Instance).]

  • Support for EXP bit rewrite in Segment Routing Flattened Mode (PTX10008 and PTX10016)–Starting in Junos OS Release 22.4R1, we support class of service (CoS) EXP bit rewrites in segment routing (SR) flattened mode for PTX10008 and PTX10016 platforms. Applying an EXP rewrite rule to the egress interface on the ingress (provider edge) router of an SR network imposes the rule to all transport labels in the stack. As a result, you don't have to configure rewrite rules for every segment in the network.

    [See: Class of Service: exp.]