Release Published Notes 2021-04-22 Junos ® OS 19.4R1 Release Notes SUPPORTED ON • ACX Series, EX Series, JRR Series, Junos Fusion Enterprise, Junos Fusion Provider Edge, MX Series, NFX Series, PTX Series, QFX Series, and SRX Series HARDWARE HIGHLIGHTS • Wi-Fi Mini-Physical Interface Module (SRX320, SRX340, SRX345, and SRX550M) SOFTWARE HIGHLIGHTS • Support for EVPN routing policies (ACX5448) • Inline monitoring services (MX Series with MPCs excluding MPC10E linecards) • Support for BGP PIC Edge with BGP labeled unicast (MX Series and PTX Series) • Integrating RIFT protocol into Junos OS (MX Series and VMX virtual routers) • Support for flexible algorithm in IS-IS for segment routing–traffic engineering (MX Series and PTX Series) • Junos Multi-Access User Plane (MX240, MX480, MX960) • Support for Lawful Intercept on Junos Multi-Access User Plane (MX240, MX480, MX960) • Precision Time Protocol (PTP) transparent clock (QFX5120 and QFX5210) • Additional support for Bidirectional Forwarding Detection (QFX5110, QFX5120, QFX5200, and QFX5210) • Selectively disable midstream APBR (SRX Series and vSRX) • Improved query performance in on-box reporting (SRX300, SRX320, SRX340, SRX345, SRX550M, SRX1500, SRX4100, SRX4200, SRX4600, and vSRX) • UTM Support for Active/Active Chassis Cluster (SRX Series) IN FOCUS GUIDE • Use this new guide to quickly learn about the most important Junos OS features and how you can deploy them in your network. 1 Release Notes: Junos® OS Release 19.4R1 for the ACX Series, EX Series, MX Series, NFX Series, PTX Series, QFX Series, SRX Series, JRR Series, and Junos Fusion 22 April 2021 Contents Introduction | 14 Junos OS Release Notes for ACX Series | 14 What's New | 15 EVPN | 15 Junos OS XML API and Scripting | 16 MPLS | 18 OAM | 18 Routing Protocols | 18 System Logging | 19 Software Defined Networking (SDN) | 19 What's Changed | 20 General Routing | 20 Routing Protocols | 20 Known Limitations | 21 General Routing | 21 Open Issues | 22 General Routing | 22 2 Resolved Issues | 23 General Routing | 24 Layer 2 Ethernet Services | 26 Platform and Infrastructure | 26 Routing Protocols | 26 Documentation Updates | 26 Feature Guides Are Renamed As User Guides | 27 Migration, Upgrade, and Downgrade Instructions | 27 Upgrade and Downgrade Support Policy for Junos OS Releases | 27 Junos OS Release Notes for EX Series Switches | 28 What's New | 29 Authentication, Authorization, and Accounting | 30 Class of Service | 30 EVPN | 30 Junos OS XML, API, and Scripting | 32 Junos Telemetry Interface | 33 Layer 2 Features | 34 MPLS | 36 Multicast | 36 Operation, Administration, and Maintenance (OAM) | 36 Port Security | 37 Routing Policy and Firewall Filters | 38 System Logging | 38 System Management | 38 User Interface and Configuration | 39 What's Changed | 39 What’s Changed in Release 19.4R1-S3 | 40 What's Changed in Release 19.4R1 | 40 Known Limitations | 41 Open Issues | 42 Authentication and Access Control | 43 Class of Service (CoS) | 43 EVPN | 43 General Routing | 43 3 Infrastructure | 45 Interfaces and Chassis | 45 Junos Fusion Enterprise | 45 Junos Fusion Satellite Software | 45 Layer 2 Ethernet Services | 45 Layer 2 Features | 46 Platform and Infrastructure | 46 Routing Protocols | 46 User Interface and Configuration | 47 Resolved Issues | 47 Authentication and Access Control | 48 EVPN | 48 General Routing | 48 Infrastructure | 50 Interfaces and Chassis | 51 Junos Fusion Enterprise | 51 Junos Fusion Satellite Software | 51 J-Web | 51 Layer 2 Ethernet Services | 51 Layer 2 Features | 51 Platform and Infrastructure | 52 Routing Protocols | 52 User Interface and Configuration | 53 Virtual Chassis | 53 Documentation Updates | 53 Feature Guides Are Renamed As User Guides | 54 Migration, Upgrade, and Downgrade Instructions | 54 Upgrade and Downgrade Support Policy for Junos OS Releases | 54 Junos OS Release Notes for JRR Series | 55 What's New | 56 Hardware | 56 What's Changed | 57 Known Limitations | 57 4 Open Issues | 58 General Routing | 58 Resolved Issues | 58 Documentation Updates | 59 Feature Guides Are Renamed As User Guides | 59 Migration, Upgrade, and Downgrade Instructions | 60 Upgrade and Downgrade Support Policy for Junos OS Releases | 60 Junos OS Release Notes for Junos Fusion Enterprise | 61 What’s New | 61 What’s Changed | 62 Known Limitations | 62 Open Issues | 63 Junos Fusion for Enterprise | 63 Resolved Issues | 64 Documentation Updates | 64 Feature Guides Are Renamed As User Guides | 65 Migration, Upgrade, and Downgrade Instructions | 65 Basic Procedure for Upgrading Junos OS on an Aggregation Device | 66 Upgrading an Aggregation Device with Redundant Routing Engines | 67 Preparing the Switch for Satellite Device Conversion | 68 Converting a Satellite Device to a Standalone Switch | 69 Upgrade and Downgrade Support Policy for Junos OS Releases | 69 Downgrading from Junos OS | 70 Junos OS Release Notes for Junos Fusion Provider Edge | 71 What's New | 71 What's Changed | 72 Known Limitations | 72 Open Issues | 73 Junos Fusion for Provider Edge | 73 Resolved Issues | 73 Documentation Updates | 74 Feature Guides Are Renamed As User Guides | 74 5 Migration, Upgrade, and Downgrade Instructions | 75 Basic Procedure for Upgrading an Aggregation Device | 75 Upgrading an Aggregation Device with Redundant Routing Engines | 78 Preparing the Switch for Satellite Device Conversion | 78 Converting a Satellite Device to a Standalone Device | 80 Upgrading an Aggregation Device | 82 Upgrade and Downgrade Support Policy for Junos OS Releases | 82 Downgrading from Junos OS Release 19.4 | 83 Junos OS Release Notes for MX Series 5G Universal Routing Platform | 83 What's New | 84 Hardware | 85 Class of Service | 88 EVPN | 88 Forwarding and Sampling | 89 General Routing | 90 High Availability (HA) and Resiliency | 90 Interfaces and Chassis | 90 Junos OS, XML, API, and Scripting | 93 Junos Telemetry Interface | 94 Layer 2 Features | 96 Layer 2 VPN | 96 MPLS | 96 Multicast | 97 Network Management and Monitoring | 98 OAM | 98 Routing Policy and Firewall Filters | 98 Routing Protocols | 99 Services Applications | 102 Software-Defined Networking | 102 Software Licensing | 103 Subscriber Management and Services | 103 6 System Logging | 104 What's Changed | 105 General Routing | 105 Interfaces and Chassis | 106 MPLS | 107 Network Management and Monitoring | 107 Routing Protocols | 107 Services Applications | 107 Software-Defined Networking | 107 Subscriber Management and Services | 108 Known Limitations | 109 General Routing | 109 Interfaces and Chassis | 110 MPLS | 111 Platform and Infrastructure | 111 Routing Protocols | 111 Open Issues | 112 Application Layer Gateways | 113 Class of Service | 113 EVPN | 113 Forwarding and Sampling | 113 General Routing | 114 Infrastructure | 122 Interfaces and Chassis | 122 Layer 2 Features | 123 Layer 2 Ethernet Services | 123 MPLS | 124 Network Management and Monitoring | 124 Next Gen Services MX-SPC3 Services Card | 124 Platform and Infrastructure | 125 Routing Protocols | 126 Services Applications | 127 Subscriber Access Management | 128 VPNs | 128 7 Resolved Issues | 129 Resolved Issues: 19.4R1 | 129 Documentation Updates | 150 Feature Guides Are Renamed As User Guides | 150 Migration, Upgrade, and Downgrade Instructions | 151 Basic Procedure for Upgrading to Release 19.4 | 152 Procedure to Upgrade to FreeBSD 11.x based Junos OS | 152 Procedure to Upgrade to FreeBSD 6.x based Junos OS | 155 Upgrade and Downgrade Support Policy for Junos OS Releases | 156 Upgrading a Router with Redundant Routing Engines | 157 Downgrading from Release 19.4 | 157 Junos OS Release Notes for NFX Series | 158 What’s New | 158 General routing | 159 Hardware | 159 Architecture | 159 What's Changed | 160 Known Limitations | 161 Interfaces | 161 Platform and Infrastructure | 161 Open Issues | 162 Mapping of Address and Port with Encapsulation (MAP-E) | 162 Interfaces | 162 Platform and Infrastructure | 163 Virtual Network Functions (VNFs) | 164 Resolved Issues | 164 Class of Service | 165 High Availability | 165 Interfaces | 165 Layer 2 Ethernet Services | 166 Platform and Infrastructure | 166 Routing Protocols | 167 SNMP | 167 Virtual Network Functions (VNFs) | 167 8 Documentation Updates | 168 Feature Guides Are Renamed As User Guides | 168 Migration, Upgrade, and Downgrade Instructions | 169 Upgrade and Downgrade Support Policy for Junos OS Releases | 169 Basic Procedure for Upgrading to Release 19.4 | 169 Junos OS Release Notes for PTX Series Packet Transport Routers | 171 What's New | 172 General Routing | 173 Hardware | 173 High Availability (HA) and Resiliency | 173 Junos OS, XML, API, and Scripting | 173 Junos Telemetry Interface | 174 MPLS | 176 Routing Protocols | 177 Services Applications | 178 Software Defined Networking | 179 System Logging | 179 What's Changed | 180 General Routing | 180 Interfaces and Chassis | 180 Routing Protocols | 181 Software-Defined Networking | 181 Known Limitations | 181 General Routing | 182 Open Issues | 183 General Routing | 183 Infrastructure | 185 Layer 2 Ethernet Services | 185 MPLS | 185 Routing Protocols | 185 Resolved Issues | 186 Forwarding and Sampling | 186 General Routing | 186 Infrastructure | 188 9 Interfaces and Chassis | 188 Layer 2 Ethernet Services | 188 MPLS | 188 Platform and Infrastructure | 188 Routing Protocols | 188 VPNs | 189 Documentation Updates | 189 Feature Guides Are Renamed as User Guides | 190 Migration, Upgrade, and Downgrade Instructions | 190 Basic Procedure for Upgrading to Release 19.4 | 190 Upgrade and Downgrade Support Policy for Junos OS