[edit virtual-chassis]
user@device# set member 3 serial-number OU81234567890 role line-card
The set virtual-chassis member member-id fabric-tree-root configuration statement specifies that only
certain devices will be root nodes in the multicast distribution trees (MDTs) created for directing traffic
within the VCF. This configuration item preempts the default VCF behavior to create one MDT for
every device in the VCF with that device as a root node. (See Understanding Traffic Flow Through a
Virtual Chassis Fabric and fabric-tree-root for more information about this option.) If your VCF uses this
option to configure the spine devices as fabric tree roots (which is the recommended usage), then
configure the new spine device as a fabric tree root as well:
[edit virtual-chassis]
user@device# set member member-id fabric-tree-root
For instance, to configure the spine device configured as member 3 as a fabric tree root node:
[edit virtual-chassis]
user@device# set member 3 fabric-tree-root
4. Commit the configuration.
[edit]
user@device# commit
5. Log in to the device that is going to be added to the VCF.
6. Configure the device into fabric mode. If needed, also configure the device into mixed mode.
Reboot the device to complete this configuration step.
If you are configuring a non-mixed VCF:
user@device> request virtual-chassis mode fabric local reboot
If you are configuring a mixed mode VCF:
user@device> request virtual-chassis mode fabric mixed local reboot
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