Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

header-navigation

Solutions

Featured solutions AI Campus and branch Data center WAN Security Service provider Cloud operator Industries
Campus and Branch

Welcome to the NOW Way to Wi-Fi

Take your networking performance to new heights with a modern, cloud-native, AI-Native architecture. Only Juniper can help you unleash the full potential of Wi-Fi 7 with our AI-Native platform for innovation.
Prepare for liftoff
Business intelligence analyst dashboard on virtual screen. Big data Graphs Charts.

AI Data Center Networking

Juniper’s AI data center solution is a quick way to deploy high performing AI training and inference networks that are the most flexible to design and easiest to manage with limited IT resources.
Find out more
Enterprise AI-Native Networking

Enterprise AI‑Native Routing

Juniper's Ai-Native routing solution delivers robust 400GbE and 800GbE capabilities for unmatched performance, reliability, and sustainability at scale.
Explore enterprise routing
Zero trust security

Ops4AI Lab

Visit our lab in Sunnyvale, CA and see our AI data center solution for yourself. You can try out your own model’s functionality and performance, too.
Visit the lab
Enterprise AI-Native Networking

Enterprise AI‑Native Routing

Juniper's Ai-Native routing solution delivers robust 400GbE and 800GbE capabilities for unmatched performance, reliability, and sustainability at scale.
Explore enterprise routing
Higher Education

Shaping Student Experiences: The NOW Way to Build Higher Education Networks

Join Juniper Networks CIO Sharon Mandell and a virtual summit of C-level IT leaders from prestigious institutions as they discuss ongoing efforts to support digital transformation.
Register to attend
Hand on tablet with healthcare overlay of graphics

Security in healthcare

In this IDC Spotlight report, discover how AI networking can automate and strengthen a healthcare ecosystem to defeat criminals and prevent loss. 
Gain insights into ecosystem security
Retail

The Future of In-Store Technologies

Join us for an enlightening webinar with Kevin McCartan, Senior IT Service Delivery Engineer at Musgrave; retail guru Jack Stratten of Insider Trends; and Christian Gilby, Director of Product Marketing at Juniper Networks, as they discuss the future of in-store technologies.
Reserve my spot

Products

Wireless access Wired access SD-WAN / SASE Routing and switching Security Mist AI™ Management software Network operating system Blueprint for AI-Native Acceleration Optics
  • Operations
ACX7020 router

Juniper ACX7020 Cloud Metro Access Router

Legacy networks simply cannot meet the demands of today’s rapidly evolving metro landscape. Unlock a new generation of highly scalable architectures and automated operations with the Juniper ACX7020. 
Learn more
EX4000 Ethernet Switch

Next-gen AI-Native EX4000 line of switches

Lack of AI innovation from your current networking vendor slowing you down? Embrace Juniper’s cloud-native, AI-Native access switches that support every level and layer, across nearly every deployment.
Discover how
The Q and AI text with an image of Bob Friday and Kedar Dhuru.

The Q&AI Podcast

Delivering practical solutions and enriching discussions, this podcast series is a vital resource for those seeking an in-depth exploration of AI's transformative potential.
Catch the latest episode

Services

Services
Services AI Care

Juniper AI Care Services Revolutionize Your Service Experience

Our industry-first AI-Native services couple AIOps with our deep expertise across the full network life cycle. You can move from reactive response to proactive insight and action.
Explore AI Care Services
Services AI Data Center

Juniper AI Data Center Deployment Services Optimize Your AI Model Runs

We use our expertise and validated designs to help design, deploy, validate and tune networks, including GPUs and storage, to get the most from your AI infrastructure operation.
Learn about AI Data Center Deployment Services

Partners

Partners

Support and Documentation

Support and Documentation

Learn

About Juniper Training Events The Feed Resources Technology learning topics Thought leadership and insights
Audience raising hands up while businessman is speaking in training at the office.

Juniper certification and training news

See the latest
Ringing of the bell

All global events

See the latest
AI-native-now

AI-Native NOW event series

Register now
Juniper's Christina Hendrix at the head of a conference table. With the text "The NOW Way to Network" overlayed, with "NOW" emphasizing the "O" in green color.

The NOW Way to Network

Watch the video series
AI Native Now

Executive insights

Dive deep with leading experts and thought leaders on all the topics that matter most to your business, from AI to network security to driving rapid, relevant transformation for your business.
Learn more
A keynote speaker giving a presentation at a conference. There are dozens of people sitting around them. The presentation is displayed via projector on all the walls in the room.

Leadership voices

Juniper Networks’ leaders operate on the front lines of creating the network of the future. Take a look around to see what’s on their minds.
Watch now
Bob Friday and Jessica Garrison speaking

Bob Friday Talks

Join Bob as he ventures into all the knowns -- and -- unknowns -- of AI.
Catch the latest episode
Documentation
Menu
License Guide
Quick Starts
Validated Designs
Explore Pathfinder Apps
CLI Explorer
Feature Explorer
Hardware Compatibility Tool
Port Checker
Browse All
Collapse

Pathfinder Apps

All

By Software

By Hardware

Learn More
Pathfinder HomeCLI ExplorerCompliance AdvisorFeature ExplorerHardware Compatibility ToolJunos XML API ExplorerJunos YANG Data Model ExplorerPort CheckerPower CalculatorSNMP MIB ExplorerSystem Log Explorer
CLI ExplorerFeature ExplorerJunos XML API ExplorerJunos YANG Data Model ExplorerSNMP MIB ExplorerSystem Log Explorer
Compliance AdvisorFeature ExplorerHardware Compatibility ToolPort CheckerPower Calculator
Home Documentation Junos OS Junos CLI Reference CLI Reference R

Junos CLI Reference

keyboard_arrow_up
close
keyboard_arrow_left
Junos CLI Reference
Table of Contents Expand all
list Table of Contents
file_download PDF
{ "lLangCode": "en", "lName": "English", "lCountryCode": "us", "transcode": "en_US" }
English
ON THIS PAGE
keyboard_arrow_right

request vmhost software rollback

date_range 19-Nov-23
arrow_backward
arrow_forward

Syntax

content_copy zoom_out_map
request vmhost  software rollback 
<re0 | re1>
<routing-engine>

Description

Roll back the Junos OS and the host OS software packages to the previous versions. You can revert to the previous versions of software packages that were loaded at the last successful request vmhost software add command.

Options

none—Roll back the software packages of the Routing Engine on the local Virtual Chassis member.

re0 | re1

(Optional) On devices that support dual or redundant Routing Engines, roll back the software packages in Routing Engine in slot 0 (re0) or software packages in the Routing Engine in slot 1 (re1).

Note:

The QFX10002-60C and PTX10002-60C devices do not have primary and backup routing engines.

routing-engine

(Optional) Specify the Routing Engine on which the software packages needs to be rolled back to the previous set of software packages. The following options are available:

  • backup—Backup Routing Engine.

  • both—Both Routing Engines.

  • local—Routing Engine on the local Virtual Chassis member.

  • master—Primary Routing Engine.

  • other—Other Routing Engine.

Required Privilege Level

maintenance

Output Fields

Sample Output

request vmhost software rollback

content_copy zoom_out_map
request vmhost  software rollback 
<reboot>

command-name

content_copy zoom_out_map
user@host> request vmhost software rollback
Current root details, 		Device sda, Label: jrootp_P, Partition: sda3
Finding alternate root for rollback
Rollback to software on jrootb_P ...
sh /etc/install/mk-mtre-rollback.sh jrootb_P b
Mounting device in preparation for rollback...
Updating boot partition for rollback...
Rollback complete, please reboot the node for it to take effect.
Cmos Write successfull
Cmos Write successfull for Boot_retry
Cmos Write successfull for Boot_retry

command-name

content_copy zoom_out_map
user@host> show vmhost version 
Current root details, 		Device sda, Label: jrootp_P, Partition: sda3
Current boot disk: Primary
Current root set: p
UEFI 	Version: NGRE_v00.53.00.01

Primary Disk, Upgrade Time: Wed Feb 24 17:51:53 UTC 2016
	Pending reboot.

Version: set p
VMHost Version: 2.951
VMHost Root: vmhost-x86_64-15.1I20160210_2212_builder
VMHost Core: vmhost-core-x86_64-15.1I20160210_2212_builder
kernel: 3.10.79-ovp-rt74-WR6.0.0.20_preempt-rt
Junos Disk: junos-install-x86-64-15.1F5.5

Version: set b
VMHost Version: 2.953
VMHost Root: vmhost-x86_64-15.1F520160222_1052_builder
VMHost Core: vmhost-core-x86_64-15.1F520160222_1052_builder
kernel: 3.10.79-ovp-rt74-WR6.0.0.20_preempt-rt
Junos Disk: junos-install-x86-64-15.1F5.6

command-name

content_copy zoom_out_map
user@host> request vmhost reboot 
Reboot the vmhost ? [yes,no] (no) yes 

warning: Rebooting re1
Initiating vmhost reboot...  ok
Initiating Junos shutdown...  shutdown: [pid 9733]
Shutdown NOW!
ok
Junos shutdown is in progress...
                                                                               
*** FINAL System shutdown message from root@nikon1 ***                       

System going down IMMEDIATELY

Release Information

Command introduced in Junos OS Release 15.1F3.

Note:

PTX3000 router supports the Routing and Control Board, RCBPTX.

Related Documentation

arrow_backward PREVIOUS request vmhost software in-service-upgrade
NEXT arrow_forward request vmhost software validate
footer-navigation

© 1999 - 2025 Juniper Networks, Inc. All rights reserved.

Scroll to top