Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

12-5
Configuring Tunnels with Generic Routing Encapsulation
Configuring GRE Tunnels
3. In the Name field, enter a number for the tunnel. You can enter a number
from 1 through 32.
The number you enter will be appended to the word tunnel to form the
name of the tunnel interface (such as tunnel1, tunnel2, and so on).
4. In the Source IP field, enter a valid IP address on this Wireless Edge
Services xl Module for a virtual LAN (VLAN) tagged on the uplink port.
Often, you will enter the IP address for the management VLAN.
This IP address is the source address in the delivery IP header; the remote
endpoint device must be able to reach this address.
5. In the Destination IP field, enter the IP address of the remote end of the
GRE tunnel.
This IP address is the destination address in the delivery IP header. Enter
an accessible address on the remote endpoint—for example, a remote
Wireless Edge Services xl Module’s management IP address. If the remote
endpoint is your company’s router, you might enter the IP address for the
router’s Ethernet interface.
6. In the Interface IP field, assign the tunnel interface an IP address in a tunnel
subnetwork.
The local Wireless Edge Services xl Module should use the same tunnel
subnetwork as the remote endpoint. For example, you could set the local
tunnel interface to 10.200.1.2/24 and the remote tunnel interface to
10.200.1.1/24.
7. In the Subnet field, enter the subnet mask for the tunnel subnetwork.
8. In the Time-to-live field, specify a value from 1 through 255.
This value represents the maximum number of transmissions (or hops)
for a packet traversing the tunnel. You should set the time-to-live value at
least one higher than the maximum number of hops between this Wireless
Edge Services xl Module and the remote endpoint. Valid time-to-live
values are from 1 through 255.
9. Click the OK button. The GRE tunnel is now listed on the Security > GRE
Tunnels screen.