- Key Features in Junos OS Release 22.2
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- play_arrow What's New
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- EVPN
- High Availability
- Interfaces
- IP Tunneling
- Junos Telemetry Interface
- Licensing
- MACsec
- MPLS
- Platform and Infrastructure
- Precision Time Protocol (PTP)
- Routing Policy and Firewall Filters
- Routing Protocols
- Routing Policy and Firewall Filters
- Source Packet Routing in Networking (SPRING) or Segment Routing
- Software Installation and Upgrade
- Subscriber Management and Services
- VPNs
- Additional Features
- What’s Changed
- Known Limitations
- Open Issues
- Resolved Issues
- Migration, Upgrade, and Downgrade Instructions
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- Licensing
- Finding More Information
- Requesting Technical Support
- Revision History
Class of Service
Support for explicit congestion notification (ECN) (NFX Series, SRX380, SRX300, SRX320, SRX340, SRX345, and vSRX 3.0)—Starting with Junos OS Release 22.2R1, you can enable ECN marking for packets in scheduler queues on the listed devices. ECN enables end-to-end congestion notification between two endpoints on TCP/IP based networks. The two endpoints are an ECN-enabled sender and an ECN-enabled receiver. You must enable ECN on both endpoints and on all intermediate devices between the endpoints.
ECN notifies networks about congestion with the goal of reducing packet loss and delay by making the sending device decrease the transmission rate until the congestion clears, without dropping packets.
To enable ECN, issue the
set class-of-service scheduler-name explicit-congestion-notification
command.