Configure a site-to-site connection from the Corporation-A router to Corporation-B router

An example of how to configure a site-to-site connection from the Corporation-A router to Corporation-B router.

Specify the IP address of the Corporate-B router as the peer for this site-to-site connection. Specify the IP address of Corporate-A Router as the local IP address.
```
vyatta@CORPA# set security vpn ipsec site-to-site peer 128.0.0.13 local-address 128.0.0.11
```
Specify the subnet that will appear to be the source address of traffic that originates from Corporation-A client going to the Corporation-B server.
```
vyatta@CORPA# set security vpn ipsec site-to-site peer 128.0.0.13 tunnel 1 local prefix 10.0.3.0/24
```
Creates a tunnel configuration to Corporation-B Router specifies the IP address of the Corporation-B server as the specific remote address.
```
vyatta@CORPA# set security vpn ipsec site-to-site peer 128.0.0.13 tunnel 1 remote prefix 10.0.1.0/24
```

Specify a virtual feature point interface to be associated with this tunnel.

vyatta@CORPA# set security vpn ipsec site-to-site peer 128.0.0.13 tunnel 1 uses vfp1

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