Juniper QFX5100, Руководство по оборудованию

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A VCF implementation is comprised of spines and leaf devices. The maximum size of a
VCF is twenty total devices, of which four devices can be configured into spine devices.
Supported devices in a VCF are:
• QFX5100-24Q (spine or leaf)
• QFX5100-48S (spine or leaf)
•
QFX5100-96S (leaf)
•
QFX3600 (leaf)
• QFX3500 (leaf)
• EX4300 (leaf)
An all QFX5100 installation is the optimum configuration. Installations with QFX3600,
QFX3500, and EX4300 as leaf devices are called mixed mode. Mixed mode devices must
be configured before joining the VCF and are not eligible for the auto-provisioned
configuration (plug and play). Adding a device configured as mixed mode to a VCF can
cause those devices to be marked inactive if the other devices are not also configured
as mixed mode.
Follow these steps to install a VCF:
1.
Install the individual switches in a rack or cabinet following the guidelines in “Planning
a Virtual Chassis Fabric Deployment” on page 48 .
BEST PRACTICE: Install spine devices at the top of the rack or cabinet in
order of master routing engine (RE), backup RE, other QFX5100s, and then
other leaf devices.
2.
Make a list of all of the serial numbers of the devices.
3.
Log into each device and configure into fabric mode and mixed mode, if needed. If a
spine device is not properly configured in fabric and mixed mode, the VCF devices
reboot to commit the mixed mode or fabric settings. When fabric and mixed mode
are not set, you might need to manually correct any issues that are related to the VCF
not forming correctly because the device did not immediately join the VCF.
WARNING: Only configure operational-level commands. If you commit
any configuration-level commands (including assigning IP address), the
Virtual Chassis Fabric cannot form and the switch must be zeroed.
4.
Configure into mixed-mode if there are QFX3600, QFX3500, or EX4300 switches
operating as leaf devices in the VCF.
5.
Configure each device for one of the provisioning modes: autoprovision, preprovision,
or nonprovision. See:
• Autoprovisioning a Virtual Chassis Fabric
Copyright © 2014, Juniper Networks, Inc. 168
QFX5100 Switch Hardware Guide