GRE Tunnel

GRE (Generic Routing Encapsulation) is one of the available tunneling mechanisms, which uses IP as the transport protocol and can be used for carrying many different passenger protocols. The tunnels behave as virtual point-to-point links that have two endpoints identified by the tunnel source and tunnel destination addresses at each endpoint.

Use the GRE Tunnel screen to view information on the traffic flow in a GRE tunnel.

To view the GRE Tunnel statistics:

1. Select the Statistics menu from the Web UI.
2. Expand the System node from the navigation pane (on the left-hand side of the screen). The System node expands to display the RF Domains created within the managed network.
3. Expand the RF Domain node.
4. Select a Wireless Controller.
5. Select GRE Tunnels.
   The Statistics > Controller > GRE Tunnels screen displays in the right-hand pane.

   

   

   This screen describes the following:

   GRE State	Displays the current operational state of the GRE tunnel.
   Peer IP Address	Displays the IP address of the peer device on the remote end of the GRE tunnel.
   Tunnel ID	Displays the session ID of an established GRE tunnel. This ID is only viable while the tunnel is operational and does not carry to subsequent sessions.
   Total Packets Received	Displays the total number of packets received from a peer at the remote end of the GRE tunnel.
   Total Packets Sent	Displays the total number of packets sent from this controller or service platform to a peer at the remote end of the GRE tunnel.
   Total Packets Dropped	Lists the number of packets dropped from tunneled exchanges between this controller or service platform and a peer at the remote end of the VPN tunnel

6. Select Clear to revert the screen counters to zero and begin a new data collection.
7. Select Refresh to update the screen‘s statistics counters to their latest value.