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Junos OS Release Notes for JRR Series

 

These release notes accompany Junos OS Release 19.4R3 for JRR Series. They describe new and changed features, limitations, and known and resolved problems in the hardware.

You can find these release notes on the Juniper Networks Junos OS Documentation webpage, located at https://www.juniper.net/documentation/product/en_US/junos-os.

What's New

Learn about new features introduced in the Junos OS main release and the maintenance releases for JRR Series.

What’s New in 19.4R3 Release

  • There are no new features or enhancements to existing features for JRR Series in Junos OS Release 19.4R3.

What’s New in 19.4R2 Release

  • There are no new features or enhancements to existing features for JRR Series in Junos OS Release 19.4R2.

What’s New in 19.4R1 Release

Hardware

  • JRR200 Route Reflector—Starting with Junos OS Release 19.4R1, JRR200 Route Reflector a 1U form factor appliance with a multicore x86 CPU and preinstalled vRR software that can host one route reflector instance is available. JRR200 is suitable for large enterprises, data centers and service providers for hosting vRR software to scale up to 30 million routing information base (RIB) entries.

    The JRR200 route reflector comes with eight 1/10 Gigabit Ethernet SFP+ ports, 64 GB of DDR4 memory, and two 240 GB solid-state drives (SSDs) in a RAID1 configuration. It is available in both AC and DC models which support Zero Touch Provisioning mode (ZTP) to ensure seamless insertion into the network and provide operational simplicity.

    [See JRR200 Route Reflector Hardware Guide and JRR200 Route Reflector Quick Start  ]

  • ZTP Support for JRR200 Route Reflector—Starting in Junos OS Release 19.4R1, ZTP can automate the provisioning of the device configuration and software image on JRR200 Route Reflector. ZTP supports self image upgrades and automatic configuration updates using ZTP DHCP options. In this release, ZTP supports revenue ports em2 thru em9, in addition to management port em0 which is supported in Junos OS Releases before 19.4R1.

    [See Zero Touch Provisioning.]

What's Changed

There are no changes in behavior and syntax for JRR Series in Junos OS Release 19.4R3.

Known Limitations

There are no known limitations for JRR Series in Junos OS Release 19.4R3.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

Open Issues

There are no open issues in hardware and software for JRR Series in Junos OS Release 19.4R3.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

Resolved Issues

Learn which issues were resolved in Junos OS main release and the maintenance releases for JRR Series devices.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

Resolved Issues: 19.4R3

General Routing

  • tcp_timer_keep log messages floods continuously on JRR200. PR1533168

Resolved Issues: 19.4R2

General Routing

  • USB install image does not work for JRR200 platform. PR1471986

  • Link state of virtual em interfaces in Junos OS might not reflect the true link status of corresponding physical interfaces in the Linux host. PR1492087

Resolved Issues: 19.4R1

There are no fixed issues in Junos OS Release 19.4R1 for JRR Series.

Documentation Updates

This section lists the errata and changes in Junos OS Release 19.4R3 documentation for JRR Series.

Feature Guides Are Renamed As User Guides

  • Starting with Junos OS 19.4R1, we renamed our Feature Guides to User Guides to better reflect the purpose of the guides. For example, the BGP Feature Guide is now the BGP User Guide. We didn’t change the URLs of the guides, so any existing bookmarks you have will continue to work. To keep the terminology consistent on our documentation product pages, we renamed the Feature Guides section to User Guides. To find documentation for your specific product, check out this link.

Migration, Upgrade, and Downgrade Instructions

This section contains the upgrade and downgrade support policy for Junos OS for the JRR Series Route Reflector. Upgrading or downgrading Junos OS might take several minutes, depending on the size and configuration of the network.

For information about software installation and upgrade, see the Installation and Upgrade Guide.

Upgrade and Downgrade Support Policy for Junos OS Releases

Support for upgrades and downgrades that span more than three Junos OS releases at a time is not provided, except for releases that are designated as Extended End-of-Life (EEOL) releases. EEOL releases provide direct upgrade and downgrade paths—you can upgrade directly from one EEOL release to the next EEOL release even though EEOL releases generally occur in increments beyond three releases.

You can upgrade or downgrade to the EEOL release that occurs directly before or after the currently installed EEOL release, or to two EEOL releases before or after. For example, Junos OS Releases 17.1, 17.2, and 17.3 are EEOL releases. You can upgrade from Junos OS Release 17.1 to Release 17.2 or from Junos OS Release 17.1 to Release 17.3.

You cannot upgrade directly from a non-EEOL release to a release that is more than three releases ahead or behind. To upgrade or downgrade from a non-EEOL release to a release more than three releases before or after, first upgrade to the next EEOL release and then upgrade or downgrade from that EEOL release to your target release.

For more information about EEOL releases and to review a list of EEOL releases, see https://www.juniper.net/support/eol/junos.html.

For information about software installation and upgrade, see the Installation and Upgrade Guide and JRR200 Route Reflector Quick Start  .