user@device> request virtual-chassis vc-port set pic-slot pic-slot-number port port-number
user@device> request virtual-chassis vc-port set pic-slot pic-slot-number port port-number
The show virtual-chassis vc-port must be issued on the ports at both ends of the link in order for that
link to be configured into a VCP link.
6. Enter the show virtual-chassis command to confirm that the VCPs are operational and to learn the
member ID of each member device in your VCF.
If you want to change the member ID that has been assigned to a member device, use the request
virtual-chassis renumber command.
7. (Optional) Configure the primary-role priority for each member device:
[edit virtual-chassis]
user@device# set member member-id mastership-priority number
In a nonprovisioned VCF, member roles are determined by a primary-role election algorithm. The first
value checked by the primary-role election algorithm is the primary-role priority value. The two devices
with the highest primary-role priority values assume the primary and backup Routing Engine role, which
must be supported spine devices in a VCF. All other devices assume the linecard role.
In a QFX5100 VCF, QFX5100 switches assume the Routing Engine role, regardless of primary-role
priority settings. QFX5100 switches can also assume the linecard role. QFX3600, QFX3500, and EX4300
switches always assume the linecard role in a mixed QFX5100 VCF, regardless of the primary-role
priority settings.
In a QFX5110 VCF, spine devices must be QFX5110-32Q switches, and can also assume the linecard
role as spine or leaf devices. In a QFX5110 VCF with QFX5100 switches, any QFX5100 members and
other QFX5110 members must be leaf devices and assume the linecard role.
NOTE: A spine device that isn’t selected as primary or backup Routing Engine assumes the
linecard role. The spine devices should still be configured with a higher primary-role priority
value than the leaf devices to assure a spine device assumes the Routing Engine role when
the primary or backup Routing Engine fails.
If two or more devices have the same primary-role priority value and are candidates for the Routing
Engine role, the primary-role election algorithm uses other parameters to determines which device is
elected into the Routing Engine role. See Understanding How the Master in a Virtual Chassis Is Elected.
A device with a primary-role priority of 0 never assumes the primary or backup Routing Engine role.
For instance, to configure the primary-role priority for member devices 0 through 19 in your VCF.
[edit virtual-chassis]
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