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loss-priority (CoS Loss Priority)


Hierarchy Level


Map CoS values to a packet loss priority (PLP). In Junos OS, classifiers associate incoming packets with a forwarding class (FC) and PLP. PLPs allow you to set the priority for dropping packets. Typically, you mark packets exceeding some service level with a high loss priority—that is, a greater likelihood of being dropped.


level can be one of the following:

  • high—Packet has high loss priority.

  • medium-high—Packet has medium-high loss priority.

  • medium-low—Packet has medium-low loss priority.

  • low—Packet has low loss priority.

Required Privilege Level

interface—To view this statement in the configuration.

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

Release Information

Statement introduced in Junos OS Release 9.2.