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Configure System Mode

You can configure different system modes to achieve varying levels of port density on the QFX5100-24Q, QFX5100-96S, and QFX5110-32Q switches. Depending on the system mode you configure, there are restrictions on which ports you can channelize. If you channelize ports that are restricted, the configuration is ignored. By default, all QSFP+ interfaces are auto-channelized. Auto-channelization is not supported on interfaces contained in expansion modules or on Virtual Chassis ports.

Note:

QFX5200 switches do not support System Mode.

Note:

When you request the system mode change, we recommend that you reboot the switch for the system mode to take effect.

CAUTION:

The Packet Forwarding Engine on the switch is restarted when you issue system mode changes. As a result, you might experience packet loss on the switch.

Table 1: System Modes Supported on QFX5100 Switches with QFX-EM-4Q or QFX-PFA-4Q Expansion Modules Installed

Default-mode

Mode-104port

Flexi-pic-mode

Non-oversubscribed-mode

QFX5100-48S

Not supported

Not supported

Not supported

Not supported

QFX5100-24Q

Supported

You do not need to configure the switch to be in this mode. On PIC 0, you can channelize all 24 40-Gbps QSFP+ ports. On PIC 1 and PIC 2, the 40-Gbps QSFP+ ports in the expansion modules are supported but cannot be channelized. In this mode, you can have one of two port combinations: 32 40-Gbps QSFP+ ports, or 96 10-Gigabit Ethernet ports plus 8 40-Gbps QSFP+ ports.

Supported

On PIC 0, all 24 40-Gbps QSFP+ ports are channelized by default, which provides 96 10-Gigabit Ethernet ports. 40-Gbps QSFP+ ports contained in an expansion module on PIC 1 are supported. On PIC 1, ports 0 and 2 are channelized by default, and ports 1 and 3 are disabled. If 40-Gbps QSFP+ ports contained in an expansion module are detected on PIC 2, they are ignored.

Supported

On PIC 0, the first four ports (ports 0 through 3) cannot be channelized. 40-Gbps QSFP+ ports contained in expansion modules on PIC 1 and PIC 2 are supported but cannot be channelized.

Supported

All 24 40-Gbps QSFP+ ports on PIC 0 can be channelized to 96 10-Gigabit Ethernet ports. 40-Gbps QSFP+ ports contained in the expansion modules on PIC 1 and PIC 2 are not supported and cannot be channelized. There is no packet loss for packets of any size in this mode.

QFX5100-96S

Supported

You do not need to configure the switch to be in this mode. On PIC 0, all 96 10-Gigabit Ethernet ports are supported. You can only channelize the 40-Gbps QSFP+ interfaces to 10-Gibabit Ethernet interfaces on ports 96 and 100. When you channelize the interfaces on ports 96 and 100, ports 97, 98, 99, 101, 102 and 103 are disabled.

Not supported

Not supported

Supported

On PIC 0, all 96 10-Gigabit Ethernet ports are supported. However, the eight 40-Gbps QSFP+ ports are not supported and cannot be channelized. There is no packet loss for packets of any size in this mode.

Table 2: System Modes Supported on QFX5100-24Q Switches with the EX4600-8F Expansion Module Installed

Default-mode

Mode-104port

Flexi-pic-mode

Non-oversubscribed-mode

QFX5100-24Q

Not supported

Not supported

Supported

On PIC 0, you cannot channelize ports 0 through 3.

Not supported

Expansion modules cannot be installed in PICs 1 and 2.

Table 3: System Modes Supported on QFX5100-24Q Switches with EX4600-8F and QFX-EM-4Q Expansion Modules Installed

Default-mode

Mode-104port

Flexi-pic-mode

Non-oversubscribed-mode

QFX5100-24Q

Only the QFX-EM-4Q module is supported.

Only the QFX-EM-4Q module is supported.

If you have installed the EX4600-8F expansion module on PIC 1, and you have installed the QFX-EM-4Q module on PIC 2, The 40-Gbps QSFP+ ports in both PIC slots are not supported.

If you have installed the EX4600-8F expansion module on PIC 2, and you have installed the QFX-EM-4Q module on PIC 1, only the QFX-EM-4Q module on PIC 1 is supported.

Supported

On PIC 0, you cannot channelize ports 0 through 3.

Not supported

You cannot install the QFX-EM-4Q or EX4600-8F modules on PICs 1 and 2.

Table 4: System Modes Supported on QFX5110-32Q Switches

Default-mode

Mode-104port

Flexi-pic-mode

Non-oversubscribed-mode

QFX5110-32Q

Supported

All 32 QSFP+ ports on the switch are configured for 40-Gigabit Ethernet only. All ports are supported as access or uplink ports, but cannot be channelized.

Not supported

Supported

  • Ports 0 through 19 of the switch are configured for 40-Gigabit Ethernet and can be channelized to 4 independent 10-Gigabit Ethernet ports.

  • Ports 20 though 27 are disabled.

  • Ports 28 through 31 are configured as 100-Gigabit Ethernet.

Supported

See QFX5110-32Q Port Panel for more details.

CAUTION:

Changing the system mode causes the FPC to reboot. 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.

CAUTION:

Take care when changing the channelization mode from Flexi-pic to 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.

The following steps describe how to change the system mode.

  1. To change the system mode, issue the following operational command:

    For example:

  2. To return to the default mode (default-mode), issue the following operational command:
  3. To see which system mode is configured, issue the following operational command: