Minimal Traffic Disruption; Upgrading Routers Using Unified Issu; Getting Started With Unified In-Service Software Upgrade; Table 9: Locating The Information You Need To Work With Issu - Juniper EX9200 Features Manual

CHAPTER 15
Understanding How Unified ISSU Enables
Software Upgrades with Minimal Traffic
Disruption

Upgrading Routers Using Unified ISSU

Related
Documentation

Getting Started with Unified In-Service Software Upgrade

Table 9: Locating the Information You Need to Work With ISSU

Task You Need to Perform
Verify unified ISSU support for your device
Copyright © 2017, Juniper Networks, Inc.
Upgrading Routers Using Unified ISSU on page 159
Getting Started with Unified In-Service Software Upgrade on page 159
Unified in-service software upgrade (ISSU) enables you to upgrade between two different
Junos OS releases with no disruption on the control plane and with minimal disruption
of traffic. Unified ISSU is only supported by dual Routing Engine platforms. In addition,
graceful Routing Engine switchover (GRES) and nonstop active routing (NSR) must be
enabled.
For additional information about using unified ISSU, see the Junos OS High Availability
Library for Routing Devices.
For additional information about using unified ISSU on SRX Series devices, see the
.
OS High Availability Guide
Upgrading Software Packages
The unified in-service software upgrade (ISSU) feature enables you to upgrade between
two different Junos OS releases with no disruption on the control plane and with minimal
disruption of traffic.
To quickly access the information you need, click on the link in
Where The Information Is Located
"Unified ISSU System Requirements" on page 161
Junos
Table 9 on page 159.
159