L2TPv3 Tunnels

Use L2TP V3 to create tunnels for transporting layer 2 frames. L2TP V3 enables a controller or service platform to create tunnels for transporting Ethernet frames to and from bridge VLANs and physical ports. L2TP V3 tunnels can be defined between WiNG managed devices and other vendor devices supporting the L2TP V3 protocol.

To review a selected controller or service platform's L2TPv3 statistics:

1. Select the Statistics menu from the Web UI.
2. Expand the RF Domain node.
3. Select a Wireless Controller.
4. Select L2TPv3 Tunnels in the left-hand side of the UI.

   The Statistics > Controller > L2TPv3 Tunnels screen displays in the right-hand pane.

   The following table describes the L2TPv3 statistics information:

   Tunnel Name	Displays the name of each listed L2TPv3 tunnel assigned upon creation. Each listed tunnel name can be selected as a link to display session data specific to that tunnel. The Sessions screen displays cookie size information as well as psuedowire information specific to the selected tunnel. Data is also available to define whether the tunnel is a trunk session and whether tagged VLANs are used. The number of transmitted, received and dropped packets also display to provide a throughput assessment of the tunnel connection. Each listed session name can also be selected as a link to display VLAN information specific to that session. The VLAN Details screen lists those VLANs used an interface in L2TP tunnel establishment.
   Local Address	Lists the IP address assigned as the local tunnel end point address, not the tunnel interface's IP address. This IP is used as the tunnel source IP address. If a local address is not specified, the source IP address is chosen automatically based on the tunnel peer IP address.
   Peer Address	Lists the IP address of the L2TP tunnel peer establishing the tunnel connection.
   Tunnel State	States whether the tunnel is Idle (not utilized by peers) or is currently active.
   Peer Host Name	Lists the assigned peer hostname used as matching criteria in the tunnel establishment process.
   Peer Control Connection ID	Displays the numeric identifier for the tunnel session. This is the peer pseudowire ID for the session. This source and destination IDs are exchanged in session establishment messages with the L2TP peer.
   Control Connection ID	Displays the router ID(s) sent in tunnel establishment messages with a potential peer device.
   Up Time	Lists the amount of time the L2TP connection has remained established amongst peers sharing the L2TPv3 tunnel connection. The Up Time is displayed in the following format- Days: Hours: Minutes: Seconds: format. If the up time is displayed as - D:0 H:0 M:0 S:0, it means the tunnel connection is not currently established.
   Encapsulation Protocol	Displays either IP or UDP as the peer encapsulation protocol. The default setting is IP. UDP uses a simple transmission model without implicit handshakes. Tunneling is also called encapsulation. Tunneling works by encapsulating a network protocol within packets carried by the second network.
   Critical Resource	Displays monitored critical resources. Critical resources are device IP addresses or interface destinations interoperated as critical to the health of the network. Critical resources allow for the continuous monitoring of these defined addresses. A critical resource, if not available, can result in the network suffering performance degradation. A critical resource can be a gateway, AAA server, WAN interface or any hardware or service on which the stability of the network depends.
   VRRP Group	Lists a VRRP group ID (if utilized). A VRRP group is only enabled when the establishment criteria is set to vrrp-master. A VRRP master responds to ARP requests, forwards packets with a destination link MAC layer address equal to the virtual router MAC layer address, rejects packets addressed to the IP associated with the virtual router and accepts packets addressed to the IP associated with the virtual router.
   Establishment Criteria	Displays the tunnel establishment criteria for this tunnel. Tunnel establishment involves exchanging 3 message types (SCCRQ, SCCRP and SCCN) with the peer. Tunnel IDs and capabilities are exchanged during the tunnel establishment with the host.

5. Select the Refresh button to update the screen's statistics counters to their latest value.
6. Click the Tunnel Name link, to view per-session statistics for a specific L2TPv3 tunnel. The sessions for the selected L2TPv3 tunnel are displayed.
7. Click the VLAN ID of the desired session to view session statistics.
8. Select an L2TPV3 tunnel, and click Down to terminate it.
9. Select Down All to terminate all configured L2TPv3 Tunnels.
10. Select an L2TPV3 tunnel, and click Up to bring it up.
11. Select Up All to bring up all configured L2TPv3 Tunnels.