Juniper QFX3000-G QFabric, Руководство по развертыванию, Страница: 70 / 652

• If you need to minimize service impact, preserve the forwarding operations
of the data plane during the upgrade, and are willing to take the extra time
required for component switchovers (in many cases, several hours), issue
the three nonstop software upgrade commands (
request system software
nonstop-upgrade (director-group | fabric | node-group)
described in this topic
in the correct order.
NOTE:
• Before you begin a nonstop software upgrade, issue the request system
software download command to copy the software to the QFabric system.
• Each of the 3 nonstop software upgrade steps must be considered parts
of the whole process. You must complete all 3 steps of a nonstop software
upgrade in the correct order to ensure the proper operation of the QFabric
system.
• Open two SSH sessions to the QFabric CLI. Use one session to monitor the
upgrade itself and use a second session to verify that the QFabric system
components respond to operational mode commands as expected. For
more information on verification of the upgrade, see
“Verifying Nonstop
Software Upgrade for QFabric Systems” on page 450 .
•
Issue the
show fabric administration inventory
command to verify that all
upgraded components are operational at the end of a step before beginning
the next step.
• Once you start the nonstop software upgrade process, we strongly
recommend that you complete all 3 steps within 12 hours.
The three steps to a successful nonstop software upgrade must be performed in the
following order:
•
Director group—The first step upgrades the Director devices, the fabric manager Routing
Engine, and the diagnostic Routing Engine. To perform the first step, issue the
request
system software nonstop-upgrade director-group command. The key actions that occur
during a Director group upgrade are:
1.
Connecting to the QFabric system by way of an SSH connection. This action
establishes a load-balanced CLI session on one of the Director devices in the Director
group.
2.
The QFabric system downloads and installs the new software in both Director
devices.
3.
The Director device hosting the CLI session becomes the master for all QFabric
system processes running on the Director group, such as the fabric manager and
network Node group Routing Engines.
4.
The QFabric system installs the new software for the backup fabric manager Routing
Engine on the backup Director device.
Copyright © 2015, Juniper Networks, Inc. 44
QFX3000-G QFabric System Deployment Guide