About the Default Configuration

By default, NetVisor OS creates a new fabric instance on VLAN 1. 

However, VLAN 1 is often the default VLAN in most networks and therefore security best practices recommend using a non-default VLAN, whenever possible, for maximum robustness and error prevention.

To assign a non-default VLAN, for example, a VLAN ID between 2 and 4093, use the command:

CLI (network-admin@switch) > fabric-create name name-string vlan vlan-id

To change the VLAN ID of an existing fabric, use the command, fabric-local-modify. 

Use the same command to change the fabric administration network, control plane network, and the network to send fabric advertisements.

CLI (network-admin@switch) > fabric-local-modify vlan vlan-id

Note: In order to change the VLAN number of an existing instance you must recreate it. Also, a switch can belong to only one fabric instance.


When you create a fabric, NetVisor OS uses the in-band network for fabric communication by default. 

To create a simple fabric of two switches in the same subnet with in-band connectivity, follow the steps below:

Assign IP addresses to the in-band network on the switches by using the commands:

CLI (network-admin@switch1*) > switch-setup-modify in-band-ip

CLI (network-admin@switch2*) > switch-setup-modify in-band-ip

You can also specify an IPv6 addresses for in-band network by providing the in-band-ip6 parameter.

Create the fabric:

CLI (network-admin@switch1) > fabric-create name fabric1

Display the fabric configuration:

CLI (network-admin@switch1) > fabric-show

name             id               vlan fabric-network control-network tid fabric-advertisement-network

---------------- ---------------- ---- -------------- --------------- --- ----------------------------

fabric1          b002698:6078060b 1    in-band        in-band         2   inband-mgmt

As seen from the output, the fabric and control networks are auto-configured to use the in-band network.

As the fabric uses VLAN 1 by default, verify the configuration using the vlan-show command:

CLI (network-admin@switch1) > vlan-show id 1

id type   auto-vxlan replicators scope description active stats ports    untagged-ports active-edge-ports

-- ------ ---------- ----------- ----- ----------- ------ ----- -------- -------------- -----------------

1  public no         none        local default-1   yes    yes   0-72,272 0-72,272       0,2,272

You can verify that the ports that connect the two switches are untagged and belong to VLAN 1.