Juniper QFX3000-G QFabric, Руководство по развертыванию, Страница: 71 / 652

5.
The backup Director device reboots to activate the new software.
6.
The master Director device begins a 15 minute sequence that includes a temporary
suspension of QFabric services and a QFabric database transfer. You cannot issue
operational mode commands in the QFabric CLI during this period.
7.
The QFabric system installs the new software for the fabric manager and diagnostic
Routing Engines on the Director group master.
8.
The QFabric system switches mastership of all QFabric processes from the master
Director device to the backup Director device.
9.
The master Director device reboots to activate the new software.
10.
The CLI session terminates, and logging back in to the QFabric system with a new
SSH connection establishes the session on the new master Director device (the
original backup).
11.
The previous master Director device resumes operation as a backup and the
associated processes (such as the fabric manager and network Node group Routing
Engines) become backup as well. The fabric control Routing Engine associated with
this Director device returns to active status.
NOTE: After the Director group nonstop software upgrade completes, any
Interconnect device or Node device that reboots will automatically
download the new software, install it, and reboot again. As a result, try not
to restart any QFabric system devices before you complete the rest of the
nonstop software upgrade steps.
TIP:
•
To enable BGP and OSPF to continue operating on the network Node
group during a Director group nonstop service upgrade, we recommend
that you configure graceful restart for these routing protocols. For more
information on graceful restart, see
“Configuring Graceful Restart for
QFabric Systems” on page 401 .
• Wait 15 minutes after the second Director device returns to service and
hosts Routing Engine processes before proceeding to step 2—the fabric
upgrade. You can verify the operational status of both Director devices
by issuing the
show fabric administration inventory director-group status
command. Also, issue the
show fabric administration inventory
infrastructure
command to verify when the Routing Engine processes
become load balanced (typically, there will be three to four Routing
Engines running on each Director device).
•
Fabric—The second step upgrades the Interconnect devices and the fabric control
Routing Engines. To perform the second step, issue the
request system software
nonstop-upgrade fabric command. The key actions that occur during a fabric upgrade
are:
45 Copyright © 2015, Juniper Networks, Inc.
Chapter 4: Software Features