Network Operating System Personalities

Table 1. Network operating system personality product support
Feature	Product	Release introduced
Dual-boot personalities	5320 Series	Fabric Engine 8.6
	5420 Series	VOSS 8.4
	5520 Series	VOSS 8.2.5

Extreme Networks offers universal hardware products that support more than one Network Operating System (NOS) personality. These hardware products ship with a default NOS personality but you can select a non-default personality. After you log in using the default NOS username and password for the first time, you can respond to an initialization question to change the NOS personality.

The following table identifies universal hardware products capable of running Fabric Engine and indicates the default NOS personality.

Table 2. Universal hardware with Fabric Engine support
Product	NOS support	Documentation
5320 Series	Switch Engine (default) Fabric Engine	ExtremeSwitching 5320 Series Quick Reference ExtremeSwitching 5320 Series Hardware Installation Guide
5420 Series	Switch Engine (default) Fabric Engine Note: VOSS support on this platform ends with VOSS 8.5.x	ExtremeSwitching 5420 Series Quick Reference ExtremeSwitching 5420 Series Hardware Installation Guide
5520 Series	Switch Engine (default) Fabric Engine Note: VOSS support on this platform ends with VOSS 8.5.x	ExtremeSwitching 5520 Series Quick Reference ExtremeSwitching 5520 Series Hardware Installation Guide

Network Operating System Selection

The primary method to select a NOS personality is by using ExtremeCloud IQ or Extreme Management Center or ExtremeCloud IQ - Site Engine. To select a NOS personality using ExtremeCloud IQ, see Read Me First – Universal Hardware. If the network is not accessible, or if you do not use Extreme Networks management software, you can also change the NOS personality manually by using CLI commands in the running NOS.

The procedure in this document includes the commands you use if the personality is Fabric Engine and you need to change the NOS personality manually. To change the personality to Fabric Engine, see the documentation for the running NOS.

Fabric Engine Default Behavior

The following list provides details about the default behavior after you deploy a universal hardware product with the Fabric Engine personality:

Port behavior:
- All ports are isolated members of private VLAN 4040 and 4049.
- The Segmented Management Instance Management VLAN and Management OOB interfaces are enabled.
- All ports are administratively enabled.
- To provide loop protection, no switching occurs between ports.
DHCP:
- DHCP client requests are cycled between In-Band, all ports untagged, and Out-of-Band ports.
DNS:
- The DHCP client issues a DNS query on the interface selected by Zero Touch Deployment to look for ExtremeCloud IQ. For information about Zero Touch Deployment, see Zero Touch Deployment.
- You can then use ExtremeCloud IQ to upgrade or change the switch configuration. If you do not use ExtremeCloud IQ, you can use Extreme Management Center or ExtremeCloud IQ - Site Engine or on-switch user interfaces.