1 Release Notes: Junos® OS Release 17.4R3 for the ACX Series, EX Series, MX Series, NFX Series, PTX Series, QFX Series, SRX Series, and Junos Fusion 17 September 2021 Contents Introduction | 13 New Features in 17.4R3 | 13 Junos OS Release Notes for ACX Series | 13 New and Changed Features | 14 Release 17.4R3 New and Changed Features | 14 Release 17.4R2 New and Changed Features | 15 Release 17.4R1 New and Changed Features | 15 Changes in Behavior and Syntax | 16 Management | 17 Network Management and Monitoring | 17 Platform and Infrastructure | 18 Security | 19 Software Licensing | 19 Subscriber Management and Services | 19 Known Behavior | 20 General Routing | 20 Known Issues | 21 General Routing | 22 Interfaces and Chassis | 24 2 Layer 2 Features | 24 MPLS | 24 Routing Protocols | 24 Virtual Chassis | 24 Resolved Issues | 25 Resolved Issues: 17.4R3 | 25 Resolved Issues: 17.4R2 | 27 Resolved Issues: 17.4R1 | 29 Documentation Updates | 29 Migration, Upgrade, and Downgrade Instructions | 30 Upgrade and Downgrade Support Policy for Junos OS Releases | 30 Junos OS Release Notes for EX Series Switches | 31 New and Changed Features | 32 Release 17.4R3 New and Changed Features | 33 Release 17.4R2 New and Changed Features | 33 Release 17.4R1 New and Changed Features | 34 Changes in Behavior and Syntax | 39 EVPNs | 39 Interfaces and Chassis | 40 Management | 40 Multicast | 40 Network Management and Monitoring | 40 Platform and Infrastructure | 41 Routing Protocols | 42 Security | 42 Software Licensing | 42 Subscriber Management and Services | 42 Virtual Chassis | 43 Known Behavior | 44 EVPN | 45 High Availability (HA) and Resiliency | 45 Infrastructure | 45 Interfaces and Chassis | 45 Junos Fusion Enterprise | 45 3 Platform and Infrastructure | 46 Routing Protocols | 46 Virtual Chassis | 46 Known Issues | 47 Authentication and Access Control | 47 EVPN | 47 General Routing | 48 Infrastructure | 49 Interfaces and Chassis | 50 Junos Fusion Enterprise | 50 Layer 2 Ethernet Services | 50 Layer 2 Features | 51 Multicast | 51 Platform and Infrastructure | 51 Routing Protocols | 52 Subscriber Access Management | 52 Resolved Issues | 53 Resolved Issues:17.4R3 | 53 Resolved Issues: 17.4R2 | 59 Resolved Issues: 17.4R1 | 63 Documentation Updates | 65 Migration, Upgrade, and Downgrade Instructions | 66 Upgrade and Downgrade Support Policy for Junos OS Releases | 66 Junos OS Release Notes for Junos Fusion Data Center | 67 New and Changed Features | 67 Changes in Behavior and Syntax | 68 Known Behavior | 68 Junos Fusion Data Center | 69 Known Issues | 69 Resolved Issues | 70 Resolved Issues: Junos OS Release 17.4R3 | 70 Resolved Issues: Junos OS Release 17.4R2 | 70 Resolved Issues: Junos OS Release 17.4R1 | 70 Documentation Updates | 71 4 Migration, Upgrade, and Downgrade Instructions | 71 Basic Procedure for Upgrading an Aggregation Device | 72 Preparing the Switch for Satellite Device Conversion | 74 Autoconverting a Switch into a Satellite Device | 76 Manually Converting a Switch into a Satellite Device | 79 Configuring a Switch into a Satellite Device Before Connecting It to a Junos Fusion Topology | 81 Configuring Satellite Device Upgrade Groups | 82 Converting a Satellite Device to a Standalone Device | 84 Upgrade and Downgrade Support Policy for Junos OS Releases | 84 Downgrading from Release 17.4 | 84 Junos OS Release Notes for Junos Fusion Enterprise | 86 New and Changed Features | 86 Release 17.4R3 New and Changed Features | 87 Release 17.4R2 New and Changed Features | 87 Release 17.4R1 New and Changed Features | 87 Changes in Behavior and Syntax | 88 Junos Fusion Enterprise | 89 Known Behavior | 89 Junos Fusion Enterprise | 89 Known Issues | 90 Junos Fusion Enterprise | 90 Resolved Issues | 91 Resolved Issues: 17.4R3 | 91 Resolved Issues: 17.4R2 | 92 Resolved Issues: 17.4R1 | 92 Documentation Updates | 93 Migration, Upgrade, and Downgrade Instructions | 93 Basic Procedure for Upgrading Junos OS on an Aggregation Device | 94 Upgrading an Aggregation Device with Redundant Routing Engines | 95 Preparing the Switch for Satellite Device Conversion | 96 Converting a Satellite Device to a Standalone Switch | 97 Upgrade and Downgrade Support Policy for Junos OS Releases | 97 Downgrading from Release 17.4 | 98 5 Junos OS Release Notes for Junos Fusion Provider Edge | 99 New and Changed Features | 99 Release 17.4R3 New and Changed Features | 100 Release 17.4R2 New and Changed Features | 100 Release 17.4R1 New and Changed Features | 100 Changes in Behavior and Syntax | 100 Security | 101 Known Behavior | 101 Junos Fusion Provider Edge | 102 Known Issues | 102 Junos Fusion Provider Edge | 103 Resolved Issues | 104 Resolved Issues: 17.4R3 | 104 Resolved Issues: 17.4R2 | 105 Resolved Issues: 17.4R1 | 105 Documentation Updates | 105 Migration, Upgrade, and Downgrade Instructions | 106 Basic Procedure for Upgrading an Aggregation Device | 106 Upgrading an Aggregation Device with Redundant Routing Engines | 109 Preparing the Switch for Satellite Device Conversion | 109 Converting a Satellite Device to a Standalone Device | 111 Upgrading an Aggregation Device | 113 Upgrade and Downgrade Support Policy for Junos OS Releases | 113 Downgrading from Release 17.4 | 113 Junos OS Release Notes for MX Series 5G Universal Routing Platforms | 114 New and Changed Features | 115 Release 17.4R3 New and Changed Features | 116 Release 17.4R2-S2 New and Changed Features | 116 Release 17.4R2 New and Changed Features | 116 Release 17.4R1 New and Changed Features | 119 Changes in Behavior and Syntax | 148 Class of Service (CoS) | 149 EVPNs | 149 General Routing | 150 6 High Availability (HA) and Resiliency | 150 Interfaces and Chassis | 150 Management | 153 MPLS | 153 Multicast | 156 Network Management and Monitoring | 156 Routing Protocols | 157 Security | 158 Services Applications | 158 Software Defined Networking | 159 Software Installation and Upgrade | 160 Software Licensing | 160 Subscriber Management and Services | 160 User Interface and Configuration | 163 Known Behavior | 163 EVPN | 164 General Routing | 165 Infrastructure | 168 Interfaces and Chassis | 168 Junos Fusion Provider Edge | 169 Layer 2 Ethernet Services | 169 Multiprotocol Label Switching (MPLS) | 169 Platform and Infrastructure | 169 Routing Protocols | 169 Services Applications | 170 Software Defined Networking (SDN) | 171 Software Installation and Upgrade | 171 Subscriber Management and Services | 171 Known Issues | 172 Class of Service (CoS) | 173 EVPN | 174 Forwarding and Sampling | 175 General Routing | 176 High Availability (HA) and Resiliency | 188 7 Infrastructure | 188 Interfaces and Chassis | 188 Layer 2 Features | 190 Layer 2 Ethernet Services | 190 MPLS | 191 Network Management and Monitoring | 193 Platform and Infrastructure | 193 Routing Policy and Firewall Filters | 195 Routing Protocols | 196 Services Applications | 199 Subscriber Access Management | 200 User Interface and Configuration | 200 VPNs | 200 Resolved Issues | 201 Resolved Issues: 17.4R3 | 202 Resolved Issues: 17.4R2 | 233 Resolved Issues: 17.4R1 | 259 Documentation Updates | 274 Subscriber Management Access Network Guide | 274 Subscriber Management Provisioning guide | 274 Subscriber Management VLANs Interfaces Guide | 275 Migration, Upgrade, and Downgrade Instructions | 275 Basic Procedure for Upgrading to Release 17.4 | 276 Procedure to Upgrade to FreeBSD 11.x-Based Junos OS | 276 Procedure to Upgrade to FreeBSD 6.x-Based Junos OS | 279 Upgrade and Downgrade Support Policy for Junos OS Releases | 281 Upgrading a Router with Redundant Routing Engines | 281 Downgrading from Release 17.4 | 281 Junos OS Release Notes for NFX Series | 282 New and Changed Features | 283 Release 17.4R3 New and Changed Features | 283 Release 17.4R2 New and Changed Features | 283 Release 17.4R1 New and Changed Features | 283 Changes in Behavior and Syntax | 284 8 Known Behavior | 284 Known Issues | 285 Virtual Network Functions | 285 Juniper Device Manager | 285 Junos Control Plane | 285 Resolved Issues | 286 Documentation Updates | 287 Migration, Upgrade, and Downgrade Instructions | 287 Upgrade and Downgrade Support Policy for Junos OS Releases | 287 Basic Procedure for Upgrading to Release 17.4 | 288 Junos OS Release Notes for PTX Series Packet Transport Routers | 290 New and Changed Features | 290 Release 17.4R3 New and Changed Features | 291 Release 17.4R2 New and Changed Features | 291 Release 17.4R1 New and Changed Features | 291 Changes in Behavior and Syntax | 303 Class of Service (CoS) | 304 General Routing | 304 Interfaces and Chassis | 304 Management | 307 MPLS | 307 Multicast | 308 Network Management and Monitoring | 308 Routing Policy and Firewall Filters | 309 Security | 310 Software Licensing | 310 Subscriber Management and Services | 310 Known Behavior | 311 General Routing | 312 Interfaces and Chassis | 312 Known Issues | 313 General Routing | 313 Infrastructure | 317 Interfaces and Chassis | 317 9 Layer 2 Features | 317 MPLS | 317 Routing Protocols | 318 Resolved Issues | 318 Resolved Issues: 17.4R3 | 319 Resolved Issues: 17.4R2 | 322 Resolved Issues: 17.4R1 | 326 Documentation Updates | 328 Migration, Upgrade, and Downgrade Instructions | 329 Upgrade and Downgrade Support Policy for Junos OS Releases | 329 Upgrading a Router with Redundant Routing Engines | 329 Basic Procedure for Upgrading to Release 17.4 | 330 Junos OS Release Notes for the QFX Series | 333 New and Changed Features | 334 Release 17.4R3 New and Changed Features | 335 Release 17.4R2 New and Changed Features | 335 Release 17.4R1 New and Changed Features