Motorola WS5100 manual To configure GRE tunnelling on the switch, Name, Source IP, Destinations IP

Switch Services 5-43

GRE tunneling allows desktop protocols to take advantage of the enhanced route selection capabilities of IP. With GRE Tunneling, it is possible for the two sub-networks of network 131.108.0.0 to talk to each other even though they are separated by another network.

To configure GRE tunnelling on the switch:

1.Select Services > GRE Tunnels from the main menu tree. The GRE Tunnels screen displays with existing GRE tunnels.

2. Refer to the top portion of the GRE Tunnels screen for the following information:

Name	Displays the names of each GRE tunnel defined for the switch.
Source IP	Displays the IP address where packets are originated by the switch and sent out through the
	tunnel interface. This defaults to the management VLAN's IP address.
Destinations IP	The destination IP address of the remote end of the GRE tunnel should be the default
	gateway for MUs that are associated on WLANs mapped to GRE tunnels. When the switch
	receives packets on the GRE tunnel interface, it first decapsulates the outer IP and GRE
	headers. An IP lookup is then performed on the destination IP of the inner IP packet using a
	MU table. If the lookup succeeds, the IP packet is encapsulated in an 802.11 frame (destined
	to the MU's MAC) and sent out on the WLAN port. If the lookup fails, the packet is dropped.
	Verify the gateway address has not been set to any VLAN interface used by the switch.