Changing the Network Operating System

The ExtremeSwitching Universal switches can run two different operating systems: Switch Engine (default) or Fabric Engine.

Making Your Initial Network Operating System Selection

You can make your initial selection of the operating system using:

ExtremeCloud IQ (see ExtremeCloud IQ Agent Support)—You can select your network operating system when purchasing your switch, which associates the switch serial number with your desired network operating system, which then causes the desired network operating system to be loaded during ExtremeCloud onboarding. For more information about using ExtremeCloud IQ, go to https://www.extremenetworks.com/support/documentation/extremecloud-iq/.
Manually during boot-up:
- Bootloader—When the message Starting Default Bootloader ...Press and hold the <spacebar> to enter the bootrom appears, press and hold the space bar until the boot menu appears (you have 30 seconds):
```
*** 5520-24W Boot Menu ( 2.2.1.3 ) ***

     EXOS: Default
     EXOS: Primary 31.1.1.398
     EXOS: Secondary 31.1.1.398
     EXOS: Primary 31.1.1.398 with default configuration
     EXOS: Secondary 31.1.1.398 with default configuration
     EXOS: Rescue
     Change the switch OS to Fabric Engine
     Run Manufacturing Diagnostics
     Update bootloader
     Reboot system
```
  Use the up and down arrow keys to select Change the switch OS to VOSS, and then press Enter.
- Safe defaults mode start-up menu (see Using Safe Defaults Mode—When the question Would you like to change the switch OS to VOSS? [y/N/q] appears:
  - For Switch Engine, type N.
  - For Fabric Engine, type y.
Continue to log onto the switch (see Logging in to the Switch).

Changing Your Network Operating System

You can change your network operating system selection at any time.

Caution

Changing your network operating systems deletes all configuration files, debug information, logs, events, and statistics information of the previous network operating system.

Note

If you anticipate ever changing the operating system to Fabric Engine, and you want to statically assign IP addresses on the DHCP server, then it is recommended to assign them based on the DHCP client ID. For more information about this issue, see Using a BOOTP or DHCP Server.

ExtremeCloud IQ—See https://www.extremenetworks.com/support/documentation/extremecloud-iq/
CLI Command—run the download [url url {vr vrname} | image [active | inactive] [[hostname | ipaddress] filename {{vr} vrname} {block-size block_size}] {partition} {install {reboot}} command specifying a VOSS image.
Note
Do not use the active, inactive, and partition options. They are not applicable for Fabric Engine.