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Junos® OS 12.3
Release Notes
Release 12.3R12
10 June 2016
Revision 5
These release notes accompany Release 12.3R12 of the Junos operating system (Junos OS). They describe device documentation and known problems with the software. Junos OS runs on all Juniper Networks ACX Series Universal Access Routers, EX Series Ethernet Switches, M Series, MX Series, and T Series routing platforms, and PTX Series Packet Transport Routers.
For the latest, most complete information about outstanding and resolved issues with the Junos OS software, see the Juniper Networks online software defect search application at http://prsearch.juniper.net.
You can also find these release notes on the Juniper Networks Junos OS Documentation Web page, which is located at https://www.juniper.net/techpubs/software/junos/.
- Junos OS Release Notes for ACX Series Routers
- New Features in Junos OS Release 12.3 for ACX Series Routers
- Changes in Default Behavior and Syntax in Junos OS Release 12.3 for ACX Series Routers
- Errata and Changes in Documentation for Junos OS Release 12.3 for ACX Series Routers
- Known Limitations in Junos OS Release 12.3 for ACX Series Routers
- Outstanding Issues in Junos OS Release 12.3 for ACX Series Routers
- Resolved Issues in Junos OS Release 12.3 for ACX Series Routers
- Upgrade and Downgrade Instructions for Junos OS Release 12.3 for ACX Series Routers
- Junos OS Release Notes for EX Series Switches
- New Features in Junos OS Release 12.3 for EX Series Switches
- Hardware
- Access Control and Port Security
- Class of Service (CoS)
- Converged Networks (LAN and SAN)
- Enhanced Layer 2 Software (ELS) on EX9200 Switches
- Ethernet Switching and Spanning Trees
- Firewall Filters and Routing Policy
- High Availability
- Infrastructure
- Interfaces and Chassis
- IPv6
- J-Web Interface
- Layer 2 and Layer 3 Protocols
- Management and RMON
- MPLS
- Virtual Chassis
- Changes in Default Behavior and Syntax in Junos OS Release 12.3 for EX Series Switches
- Limitations in Junos OS Release 12.3 for EX Series Switches
- Outstanding Issues in Junos OS Release 12.3 for EX Series Switches
- Resolved Issues in Junos OS Release 12.3 for EX Series Switches
- Issues Resolved in Release 12.3R1
- Issues Resolved in Release 12.3R2
- Issues Resolved in Release 12.3R3
- Issues Resolved in Release 12.3R4
- Issues Resolved in Release 12.3R5
- Issues Resolved in Release 12.3R6
- Issues Resolved in Release 12.3R7
- Issues Resolved in Release 12.3R8
- Issues Resolved in Release 12.3R9
- Issues Resolved in Release 12.3R10
- Issues Resolved in Release 12.3R11
- Issues Resolved in Release 12.3R12
- Changes to and Errata in Documentation for Junos OS Release 12.3 for EX Series Switches
- Upgrade and Downgrade Instructions for Junos OS Release 12.3 for EX Series Switches
- Junos OS Release Notes for M Series Multiservice Edge Routers, MX Series 3D Universal Edge Routers, and T Series Core Routers
- New Features in Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Hardware
- Class of Service
- Forwarding and Sampling
- High Availability (HA) and Resiliency
- Interfaces and Chassis
- Junos OS XML API and Scripting
- Layer 2 Features
- Layer 2 Tunneling Protocol
- MPLS
- Multicast
- Power Management
- Routing Policy and Firewall Filters
- Routing Protocols
- Security
- Subscriber Access Management
- System Logging
- User Interface and Configuration
- VPLS
- VPNs
- Changes in Default Behavior and Syntax, and for Future Releases in Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Changes in Default Behavior and Syntax
- High Availability (HA) and Resiliency
- Interfaces and Chassis
- IPv6
- J-Web
- Junos OS XML API and Scripting
- MPLS
- Multicast
- Network Address Translation (NAT)
- Network Management and Monitoring
- Routing Policy and Firewall Filters
- Routing Protocols
- Security
- Services Applications
- Subscriber Access Management
- User Interface and Configuration
- VPNs
- Changes Planned for Future Releases
- Known Behavior in Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Errata and Changes in Documentation for Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Outstanding Issues in Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Class of Service (CoS)
- Forwarding and Sampling
- General Routing
- High Availability (HA) and Resiliency
- Interfaces and Chassis
- Layer 2 Features
- MPLS
- Multicast
- Network Management and Monitoring
- Platform and Infrstructure
- Routing Protocols
- Services Applications
- Software Installation and Upgrade
- Subscriber Access Management
- User Interface and Configuration
- VPNs
- Resolved Issues in Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Resolved Issues
- Previous Releases
- Resolved Issues in Release 12.3R11
- Resolved Issues in Release 12.3R10
- Resolved Issues in Release 12.3R9
- Resolved Issues in Release 12.3R8
- Resolved Issues in Release 12.3R7
- Resolved Issues in Release 12.3R6
- Resolved Issues in Release 12.3R5
- Resolved Issues in Release 12.3R4
- Resolved Issues in Release 12.3R3
- Resolved Issues in Release 12.3R2
- Upgrade and Downgrade Instructions for Junos OS Release 12.3 for M Series, MX Series, and T Series Routers
- Basic Procedure for Upgrading to Release 12.3
- Upgrade and Downgrade Support Policy for Junos OS Releases
- Upgrading a Router with Redundant Routing Engines
- Upgrading Juniper Network Routers Running Draft-Rosen Multicast VPN to Junos OS Release 10.1
- Upgrading the Software for a Routing Matrix
- Upgrading Using Unified ISSU
- Downgrading from Release 12.3
- Junos OS Release Notes for PTX Series Packet Transport Routers
- New Features in Junos OS Release 12.3 for PTX Series Packet Transport Routers
- Changes in Default Behavior and Syntax in Junos OS Release 12.3 for PTX Series Packet Transport Routers
- Errata and Changes in Documentation for Junos OS Release 12.3 for PTX Series Packet Transport Routers
- Outstanding Issues in Junos OS Release 12.3 for PTX Series Packet Transport Routers
- Resolved Issues in Junos OS Release 12.3 for PTX Series Packet Transport Routers
- Junos OS Documentation and Release Notes
- Requesting Technical Support
- Revision History
