Creates a GRE Concentrator profile for supported ExtremeWireless WiNG controllers.
This feature allows an ExtremeWireless WiNG controller to operate as a terminator for GRE tunnels configured on ExtremeCloud IQ managed Universal APs running IQ Engine OS. GRE Concentrator supports up to 1000 GRE tunnel terminations.

Note
You must disable all legacy ExtremeWireless WiNG adoption to enable the controller to operate only as a GRE Concentrator. After you create a GRE tunnel concentrator profile, configure the DHCP Server Policy to create dhcp pools for the allowed VLANs defined in the GRE tunnel concentrator profile.
Example:
MD-DC7510(config)#dhcp-server-policy greconc
MD-DC7510(config-dhcp-server-policy-greconc)#show context
dhcp-server-policy greconc
  option  AP-Adopt 191  ascii
  dhcp-pool VLAN97
    network  10.97.0.0/24
    address range 10.97.0.100  10.97.0.150
    lease 0 5
    default-router  10.97.0.1
    dns-server   4.2.2.2
    respond-via-unicast
 dhcp-pool VLAN98
    network  10.98.0.0/24
    address range 10.98.0.100  10.98.0.150
    default-router  10.98.0.1
    dns-server   4.2.2.2
    respond-via-unicast
            For further detail about the GRE Concentrator feature, including instructions on configuring GRE tunneling on ExtremeCloud IQ managed Universal APs, see ExtremeWireless WiNG™ Controllers Getting Started Guide — NOVA UI.
| <GRE-CONC-TUNNEL> | Specify the GRE concentrator name. If a GRE concentrator profile
                                with the specified name does not exist, it is created. Note: Only one
                                    GRE concentrator profile can be configured for a
                                    controller. | 
vx9000-AA3AED(config-profile-gre-conc-tunnel)#gre concentrator ?
  GRE-CONC-TUNNEL  Name of the GRE concentrator to be configured (will be
                   created if it does not exist)
            vx9000-AA3AED(config-profile-gre-conc-tunnel)#gre concentrator gre-test vx9000-AA3AED(config-profile-gre-conc-tunnel-gre-concentrator-gre-test)#? GRE Concentrator Tunnel Mode commands: allowed-vlan VLANs to tunnel idle-timeout GRE tunnel inactivity timeout no Negate a command or set its defaults
| allowed-vlan | Specifies the VLANs that are allowed to terminate GRE tunnels on the GRE concentrator | 
| idle-timeout | Specifies the GRE concentrator inactivity timeout | 
| show gre {concentrator×€concentrator-tunnels} | Displays GRE tunnel concentrator connection details. | 
| no | Disables GRE concentrator on this profile |