- Introduction
- Key Features in Junos OS Release 21.4
- play_arrow Junos OS Release Notes for ACX 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 cRPD
- play_arrow What's New
- play_arrow What's New in 21.4R1
- What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- play_arrow Junos OS Release Notes for cSRX
- 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
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- play_arrow What's New
- What's Changed
- Known Limitations
- Open Issues
- play_arrow Resolved Issues
- Documentation Updates
- play_arrow Junos OS Release Notes for MX Series
- play_arrow What's New
- play_arrow What's New in 21.4R1
- Hardware
- Architecture
- Chassis
- EVPN
- High Availability
- IP Tunneling
- Junos Telemetry Interface (JTI)
- Layer 2 VPN
- Interfaces
- MPLS
- Multicast
- Network Address Translation (NAT)
- Operation, Administration, and Maintenance (OAM)
- Platform and Infrastructure
- Routing Protocols
- Source Packet Routing in Networking (SPRING) or Segment Routing
- Services Applications
- Software Defined Networking (SDN)
- Software Installation and Upgrade
- Subscriber Management and Services
- VPNs
- Additional Features
- 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 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
- 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 in 21.4R1
- Application Identification (AppID)
- Authentication and Access Control
- Chassis
- Chassis Cluster-specific
- Flow-Based and Packet-Based Processing
- Hardware
- J-Web
- Network Address Translation (NAT)
- Platform and Infrastructure
- Software Installation and Upgrade
- Unified Threat Management (UTM)
- Additional Features
- 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 Junos OS Release Notes for vRR
- play_arrow Junos OS Release Notes for vSRX
- play_arrow What's New in 21.4R1
- 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
Release Notes: Junos® OS Release 21.4R1
SUPPORTED PLATFORMS
ACX Series, cRPD, cSRX, EX Series, JRR Series, Juniper Secure Connect, Junos Fusion, MX Series, NFX Series, PTX Series, QFX Series, SRX Series, vMX, vRR, and vSRX
KEY FEATURES
- Refer to Key Features in Junos OS Release 21.4 to quickly learn about the most important Junos OS features and how you can deploy them in your network.
HARDWARE HIGHLIGHTS
SOFTWARE HIGHLIGHTS
- Interconnecting an EVPN-VXLAN Data Center with EVPN-MPLS in WAN using Inter-AS without a Logical Tunnel interface (MX-Series-All, EX9200, EX9252, EX9253)
- Hybrid Mode (SyncE and PTP) over LAG supports PTPoIPv4 and PTPoE (MX204 and MX10003)
- Support for UPF N9 Uplink Classifier (MX240, MX480, MX960)
- Support for GeoIP Filtering, Global Allowlist, and Global Blocklist (MX240, MX480, and MX960 routers )
- Support for Precision Time Protocol (PTP) over Ethernet in hybrid mode over link aggregation group (LAG) (MX10008 with JNP10K-LC2101 MPC line card)
- DHCP relay in an EVPN-VXLAN fabric with an IPv6 underlay (QFX5120-32C, QFX5120-48T, QFX5120-48Y, QFX10002, QFX10008, and QFX10016)
- EVPN-VXLAN fabric with an IPv6 underlay (QFX5120-32C, QFX5120-48T, QFX5120-48Y, QFX5120-48YM, QFX10002, QFX10008, and QFX10016)
- Inband Flow Analyzer (IFA) 2.0 (QFX5120-48Y and QFX5120-32C)
- Support for firewall filters on EVPN-VXLAN with IPv6 underlays (QFX5120-32C, QFX5120-48T, QFX5120-48Y, and QFX5120-48YM)
- Increase in AC redundancy mode to 2+2 for high capacity high line PEMs (SRX5400)
- Enhancements to source NAT pool IP address range and NAT pool name character length (SRX Series and MX-SPC3)
- UTM Content Filtering Based on File Content (SRX Series and vSRX)
- Support for FPC major alarm (SRX5400, SRX5600, and SRX5800)
- Support for FAT flow (SRX4100, SRX4200, SRX4600, SRX5400, SRX5600, SRX5800, and vSRX 3.0)
- EVPN-VXLAN additional features