Juniper Virtual Chassis technology allows multiple physical switches to be logically combined into a single, high-performance virtual switch. Here are some common Virtual Chassis configuration commands in Juniper switches:

Step 1 :Create a Virtual Chassis

set virtual-chassis preprovisioned
set virtual-chassis member <member-id> role <role> [interface <interface>]

Note: Replace <member-id> with the member ID of the switch and <role> with the role of the switch (e.g., routing-engine, line-card, or both).

Step 2:Configure Virtual Chassis interfaces:

set interfaces vcp <interface> vlan-tagging
set interfaces vcp <interface> mtu <mtu-size>

Note: Replace <interface> with the Virtual Chassis interface name and <mtu-size> with the maximum transmission unit size.

Step 3:Configure Virtual Chassis settings:

set virtual-chassis mode <mode>
set virtual-chassis no-split-detection
set virtual-chassis mac-persistence-timer <time>
set virtual-chassis mac-limit <limit>
set virtual-chassis priority <priority>

Note: Replace <mode> with the Virtual Chassis mode (e.g., active/active, active/backup, or mixed).

Step 4:Display Virtual Chassis information:

show virtual-chassis
show virtual-chassis status
show virtual-chassis configuration
show virtual-chassis interfaces