Configure a GRE Topology for a VLAN

Configure a Generic Routing Encapsulation (GRE) tunnel topology for a given VLAN and assign Tunnel Concentrator instances to the VLAN.

Log in to ExtremeCloud IQ Controller.
Go to Configure > Policy > VLAN.
Configure the following parameters:

VLAN Name

Name of the GRE VLAN

Mode

Select GRE for a Generic Routing Encapsulation (GRE) tunnel.

VLAN ID

The ID of the VLAN. This value must be unique.

Tagged

Specify if the egress port traffic is tagged or untagged. Most GRE VLAN topologies must be tagged. Each concentrator can support only one untagged topology. Select Tagged to tag the topology.

Tunnel Concentrators

List of Tunnel Concentrators.
Select a concentrator from the list, then select Add. You can add up to three concentrators to a single topology. When more than one termination point is added to the list, failover is supported.

The order of the termination points is significant. The primary concentrator must be the first termination point in the list. The AP issues a ping request to the first termination point. If that request fails, it pings the second point, and then the third point. With this organization, you can use the same three concentrators for multiple VLANs, and by varying the termination point order for each VLAN, you can balance the traffic load.
Note
It is a best practice to configure more than one Tunnel Concentrator per VLAN topology for failover. A topology that uses a single generic (non-encrypted) GRE tunnel, without configured backups, is not using the available mechanisms to detect if a Tunnel Concentrator is down. Therefore, no AP alarms, related to the tunnel connectivity, are generated for such a topology.

Load Balance

This checkbox is visible only when the list of concentrators has more than one element. Check Load Balance to load balance APs between concentrators.
Select Save.