Specifications

• Known Behavior on page 11

• Known Issues on page 12

• Documentation Updates on page 19

• Migration, Upgrade, and Downgrade Instructions on page 19

• Product Compatibility on page 20

Documentation Updates

There are no errata or changes in Junos OS Release 13.3R6 for the EX Series switches

documentation.

Documentation

New and Changed Features on page 6•

• Changes in Behavior and Syntax on page 8

• Known Behavior on page 11

• Known Issues on page 12

• Resolved Issues on page 13

• Migration, Upgrade, and Downgrade Instructions on page 19

• Product Compatibility on page 20

Migration, Upgrade, and Downgrade Instructions

This section contains upgrade and downgrade policies for Junos OS for the EX Series.

Upgrading or downgrading Junos OS can take several hours, depending on the size and

configuration of the network.

•

Upgrade and Downgrade Support Policy for Junos OS Releases on page 19

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 10.0, 10.4, and 11.4 are EEOL releases. You can upgrade from Junos OS

Release 10.0 to Release 10.4 or even from Junos OS Release 10.0 to Release 11.4. However,

you cannot upgrade directly from a non-EEOL release that is more than three releases

ahead or behind. For example, you cannot directly upgrade from Junos OS Release 10.3

(a non-EEOL release) to Junos OS Release 11.4 or directly downgrade from Junos OS

Release 11.4 to Junos OS Release 10.3.

Documentation Updates