Juniper QFX3500, Hardware Documentation

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NOTE: A spine device whose fabric and mixed mode settings are improperly set will not
properly join a mixed VCF. You can check the mode settings by using the show virtual-chassis
mode command.
We recommend that you set the fabric and mixed mode settings before you interconnect
your spine devices into the VCF to avoid the following issues:
•
Incurring downtime during VCF formation as the devices reboot to commit the fabric or
mixed mode settings.
•
Manually correcting potential issues related to VCF formation because a device did not
immediately join the VCF.
You can, however, use the request virtual-chassis mode fabric local or request virtual-chassis
mode mixed local commands to set a spine device into fabric or mixed mode after
interconnecting your VCF.
The fabric and mixed mode settings are automatically updated for a leaf device when it is
interconnected into an autoprovisioned or preprovisioned VCF if the device is zeroized or
has the factory default configuration. If the fabric or mixed mode settings are automatically
changed when a leaf device is interconnected into a VCF, the leaf device automatically reboots
in order to properly join the VCF. To avoid this potentially unexpected reboot and impact on
VCF operation, as mentioned earlier, for best results, set the fabric and mixed modes and
manually reboot each leaf device before cabling it into the VCF.
3. After the reboot completes, log in to one of the spine devices in your VCF.
4. Set the configuration mode to autoprovisioned:
[edit]
user@device#
set virtual-chassis auto-provisioned
5. Configure at least two spine devices into the Routing Engine role:
[edit virtual-chassis]
user@device#
set member member-id serial-number serial-number role routing-engine
For instance, to configure two spine devices with the serial numbers “SERIALNUMB00” and
“SERIALNUMB01” into the Routing Engine role as members 0 and 1:
[edit virtual-chassis]
user@device#
set member 0 serial-number SERIALNUMB00 role routing-engine
user@device#
set member 1 serial-number SERIALNUMB01 role routing-engine
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