Chapter8 Site-to-Site VPN
How Do I...
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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
How Do I Create a VPN to More Than One Site?
You can use SDM to create multiple VPN tunnels on one interface on your router.
Each VPN tunnel will connect the selected interface on your router to a different
subnet at the destination router. You can configure multiple VPN tunnels to
connect to the same interface but to different subnets on the destination router, or
you can configure multiple VPN tunnels that will connect to different interfaces
on the destination router.
First, you must create the initial VPN tunnel. The steps below describe how to
create the initial VPN tunnel. If you have already created your first VPN tunnel
and need to add an additional tunnel to the same interface, skip the first procedure
and perform the steps in the next procedure in this help topic.

Create the initial VPN tunnel:

Step1 From the left frame, select VPN.
Step2 Select Create a Site-to-Site VPN .
Step3 Click Launch the Selected Task.
The VPN Wizard starts.
Step4 Click Quick Setup.
Step5 Click Next>.
Step6 From the Select the Router Interface for this VPN Connection field, choose the
interface on the source router on which to create the VPN tunnel. This is the
interface connected to the Internet on the Local system in the Use Case Scenario
diagram.
Step7 In the Peer Identity field, enter the IP address of the destination router interface.
Step8 In the Authentication fields, enter and reenter the pre-shared key that the two VPN
peers will use.
Step9 In the Source field, select the interface that connects to the subnet whose IP traffic
you want to protect. This is the Local router in the Use Case Scenario diagram,
and is usually an interface connected to the LAN.
Step10 In the Destination fields, enter the IP address and subnet mask of the destination
router.
Step11 Click Next>.