and QFX3600 switches that are node devices in a QFabric system cannot be part of
a Virtual Chassis.
•
For QFX5100 and EX4300 switches in a QFX Series Virtual Chassis, you must download
the software image for the standalone switch. QFX switches that are in a Junos Fusion
cannot be part of a Virtual Chassis.
A QFX5110 Virtual Chassis can only be set up using QFX5110 and QFX5100 switches that
are running the same Junos OS image, which must be an image that includes “-qfx-5e-”
in the filename when the Junos OS software package is downloaded from the Software
Center.
CAUTION: QFX5100 switches running a Junos OS image that includes
“-qfx-5-” in the software package filename must be upgraded to the image
filename that includes “-qfx-5e-” before being added to a QFX5110 Virtual
Chassis,or the VirtualChassiswill not form. See Upgrading a QFX5100 Switch
with a USB Device to Join a QFX5110 Virtual Chassis or Virtual Chassis Fabric.
A QFX Series Virtual Chassis can be configured with either:
•
A preprovisioned configuration—You can deterministically control the member ID and
role assigned to a member switch by tying it to its serial number.
•
A nonprovisioned configuration—The master sequentially assigns a member ID to other
member switches. The role is determined by the mastership priority value and other
factors in the master election algorithm.
NOTE: A VirtualChassisconfigurationhas two switchesacting in the Routing
Engine role—the master switch and the backup switch. Therefore, we
recommend that you always use commit synchronize rather than simply
commit tosave configuration changes made for a VirtualChassis. This ensures
that the configuration changes are saved to both switches acting as Routing
Engines.
NOTE: In Junos OS release 13.2X51-D20, you can interconnect only up to four
QFX5100-96Sswitches in a non-mixed QFX5100 Virtual Chassis. Otherwise,
as with other Junos OS releases, in Junos OS release 13.2X51-D20 you can
interconnect up to ten of any other QFX5100 switches into a Virtual Chassis.
Starting in Junos OS release 13.2X51-D25, you can configure up to ten
QFX5100-96S switches into a mixed or non-mixed QFX5100 Virtual Chassis.
Copyright © 2017, Juniper Networks, Inc.110
QFX3500 Device Hardware Documentation
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