drop-congestion-notification
Syntax
drop-congestion-notification {
forwarding-class forwarding-class;
udp-port udp-port;
}Hierarchy Level
[edit class-of-service]
Description
Define Drop Congestion Notification (DCN) for all devices in the network using DCN. DCN is a congestion management technique based on packet trimming. Rather than drop a packet when congestion occurs, the device trims the packet’s payload, resulting in a smaller packet. The device then transmits this smaller packet through a high-priority queue toward its destination. Subsequent hops in the network must recognize DCN-drop marked packets and direct them to high-priority queues as well. End hosts must process the trimmed DCN packets, identify the packets dropped due to congestion, and request retransmission of those lost packets.
Options
| forwarding-class |
Forwarding class for DCN-marked packets. This forwarding class should map to a strict-high priority queue, ideally used only for DCN-marked packet delivery. This better ensures delivery of DCN-marked packets to the receiver host. |
| udp-port |
DCN protocol number, which is a unique L4 UDP port number in the network. Devices in the network use this to identify DCN-marked packets and assign those packets to the defined forwarding class.
|
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 Evolved Release 25.4R1.