Juniper EX9200 Features Manual page 201

Release History Table
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Copyright © 2017, Juniper Networks, Inc.
NOTE: Before enabling ISSU on MX routers, when upgrading from a Junos
OS Release 14.1 or earlier to Junos OS Release 14.2 or later, you must disable
IGMP snooping, and PIM snooping, in all protocol hierarchies. This includes
the bridge-domain and routing-instances hierarchies.
NOTE: On MX Series routers with MPC/MIC interfaces, the policers for transit
traffic and statistics are disabled temporarily during the unified ISSU process.
Release Description
16.1r1 Starting with Junos OS Release 16.1R1, while performing a unified ISSU from
a FreeBSD 6.1-based Junos OS to an upgraded FreeBSD 10.x-based Junos OS,
the configuration must be validated on a remote host or on a Routing Engine.
13.2 Starting with Junos OS Release 13.2
Getting Started with Unified In-Service Software Upgrade on page 159
Best Practices for Performing a Unified ISSU on page 183
Understanding the Unified ISSU Process
Example: Performing a Unified ISSU on page 188
request system software validate on (Junos OS with Upgraded FreeBSD)
Chapter 16: Unified ISSU System Requirements
181