Virtual Chassis And Virtual Chassis Fabric - Juniper QFX5110 Series Hardware Documentation

CAUTION:
default. If you have existing ports that are channelized in Flexi-pic mode, remove
the channelization from the interface before changing the system mode. Changing
the Flexi-pic mode to the default mode with channelized ports causes the ports to
go down, log a system log error, and remain down. You must manually remove the
channelization configuration on the ports to bring the ports up in default mode.
Because there can be a slight loss of data while the FPC reboots, we recommend
that you only configure the changes during a maintenance window for this release.
NOTE: QFX5110-32Q switches that are configured for Flexi-pic mode and upgraded to Junos
OS Release 18.1R1 and later come up in default mode.
Non-oversubscribed mode (Junos OS Release 18.1R1 and later)
Ports 0 through 23 only can be channelized. The remaining ports are disabled. Use this mode to achieve
960 Gbps speeds for either 24 ports of 40 Gigabit Ethernet or 96 ports of 10 Gigabit Ethernet.
Use the request chassis system-mode command to change the system mode for the switch. If you attempt
to channelize a non-supported port, the configuration is ignored.

Virtual Chassis and Virtual Chassis Fabric

To connect QFX5110 switches as members in a QFX5110 Virtual Chassis, you need a pair of dedicated
ports on each switch and cables that link each member in the Virtual Chassis into a ring topology. Each
member in the ring has at least one direct Virtual Chassis port (VCP) connection to a upstream and
downstream member. QFX5110 switches are recommended in the master, backup, or line card role. You
may only mix QFX5100 members with QFX5110 members in a QFX5110 Virtual Chassis; no other QFX
Series or EX Series switches are supported. See Connecting QFX5110 and QFX5100 Members in a QFX5110
Virtual Chassis for a a diagram of cabling QFX5110 switches in a ring topology.
To connect a QFX5110 switch as a spine or leaf device in a Virtual Chassis Fabric (VCF), you need a pair
of dedicated ports and cables that link each spine device and leaf device in the VCF. All spine devices have
at least one direct VCP connection to each leaf device in the VCF. See Connecting QFX5110 in a QFX5110
Virtual Chassis Fabric for a cabling diagram.
Take care when changing the channelization mode from Flexi-pic to
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