- Introduction
- play_arrow Junos OS Release Notes for cSRX
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- play_arrow Junos OS Release Notes for EX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for JRR Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
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- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
-
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
-
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for MX Series
- play_arrow What's New
- What's New in 21.2R3
- What's New in 21.2R2
- play_arrow What's New in 21.2R1
- Hardware
- Authentication and Access Control
- Flow-Based and Packet-Based Processing
- High Availability
- Interfaces
- Juniper Extension Toolkit (JET)
- Junos Telemetry Interface
- Layer 2 VPN
- MACsec
- MPLS
- Network Address Translation (NAT)
- Network Management and Monitoring
- Platform and Infrastructure
- Routing Options
- Routing Policy and Firewall Filters
- Routing Protocols
- Services Applications
- Software Defined Networking (SDN)
- Software Installation and Upgrade
- Source Packet Routing in Networking (SPRING) or Segment Routing
- Subscriber Management and Services
- System Management
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for NFX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for PTX Series
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for QFX Series
- play_arrow What's New
- What's New in 21.2R3
- play_arrow What's New in 21.2R2
- play_arrow What's New in 21.2R1
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for SRX Series
- play_arrow What's New
- What's New in 21.2R3
- What's New in 21.2R2
- play_arrow What's New in 21.2R1
- Application Identification (AppID)
- Authentication and Access Control
- Flow-Based and Packet-Based Processing
- Interfaces
- J-Web
- Juniper Advanced Threat Prevention Cloud (ATP Cloud)
- Junos Telemetry Interface
- Network Management and Monitoring
- Software Installation and Upgrade
- Securing GTP and SCTP Traffic
- VPNs
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- play_arrow Junos OS Release Notes for vMX
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Upgrade Instructions
- play_arrow Junos OS Release Notes for vRR
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- play_arrow Junos OS Release Notes for vSRX
- play_arrow What's New
- play_arrow What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- Migration, Upgrade, and Downgrade Instructions
- Licensing
- Finding More Information
- Documentation Feedback
- Requesting Technical Support
- Revision History
Routing Protocols
Support for flexible algorithm in IS-IS for segment routing–traffic engineering (ACX Series)—Starting in Junos OS Release 21.2R1, you can thin slice a network by defining flexible algorithms that compute paths using different parameters and link constraints based on your requirements. For example, you can define a flexible algorithm that computes a path to minimize IGP metric and define another flexible algorithm to compute a path based on traffic-engineering metric to divide the network into separate planes. This feature allows networks without a controller to configure traffic engineering and utilize segment routing capability of a device.
To define a flexible algorithm, include the
flex-algorithm
statement at the[edit routing-options]
hierarchy level.To configure participation in a flexible algorithm include the
flex-algorithm
statement at the[edit protocols isis segment routing]
hierarchy level.[See Understanding IS-IS Flexible Algorithm for Segment Routing.]
Flexible algorithm inter-level leaking support for SRv6 and SR-MPLS in ISIS (ACX Series, MX Series and PTX Series)—Starting in Junos OS Release 21.2R1, we support flexible algorithm inter-level leaking for SRv6 and SR-MPLS in IS-IS. Also, we partially support TE-App RFC 8919 in its basic form and extends 6PE support for flexible algorithm.