Unified Issu System Requirements - Juniper EX9200 Features Manual

CHAPTER 16

Unified ISSU System Requirements

Unified ISSU System Requirements
Copyright © 2017, Juniper Networks, Inc.
Unified ISSU System Requirements on page 161
The unified in-service software upgrade (ISSU) feature enables you to upgrade your
device between two different Junos OS releases with no disruption on the control plane
and with minimal disruption of traffic. Unified ISSU is supported only on dual Routing
Engine platforms. In addition, the graceful Routing Engine switchover (GRES) and nonstop
active routing (NSR) features must be enabled.
To access an interactive tool for verifying hardware support for unified ISSU, see the
Juniper Networks Feature Explorer (
This section contains the following topics:
General Unified ISSU Considerations for All Platforms on page 162
Unified ISSU Considerations for MX Series Routers on page 163
Unified ISSU Considerations for PTX Series Routers on page 163
Unified ISSU Considerations for T Series Routers on page 164
Unified ISSU Platform Support on page 164
Unified ISSU Protocol Support for M Series, MX Series, and T Series Routers and EX9200
Switches on page 166
Unified ISSU Feature Support on page 166
Unified ISSU PIC Support Considerations on page 167
http://pathfinder.juniper.net/feature-explorer/
).
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