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forwarding-class (VoIP)



Hierarchy Level

Release Information

Statement introduced in Junos OS Release 9.0 for EX Series switches.


For EX Series switches, configure the forwarding class used to handle packets on the VoIP interface.


The forwarding-class statement at the [edit ethernet-switching-options voip interface interface-name] hierarchy level is used only by LLDP-MED for advertising capabilities VoIP phones. It is not used to classify VoIP traffic.




class—Forwarding class:

  • assured-forwarding— Assured forwarding (AF)—Provides a group of values you can define and includes four subclasses: AF1, AF2, AF3, and AF4, each with three drop probabilities: low, medium, and high.

  • best-effort—Provides no service profile. For the best effort forwarding class, loss priority is typically not carried in a class-of-service (CoS) value, and random early detection (RED) drop profiles are more aggressive.

  • expedited-forwading—Provides a low loss, low latency, low jitter, assured bandwidth, end-to-end service.

  • network-control—Provides a typically high priority because it supports protocol control.

Required Privilege Level

routing—To view this statement in the configuration.

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