user manual

Chapter 11 Site-to-Site VPN
Create Site to Site VPN
11-22
Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
When split tunneling is selected, the IP Address and Subnet Mask fields will
appear, requiring you to enter the IP Address and Subnet Mask of the
destination peer. You must ensure that the destination IP address entered in
the Tunnel Destination field of the GRE Tunnel Information window is
reachable. If it is not reachable, no tunnel will be established.
IP Address
Enabled with split tunneling. Enter the IP address of the network at the other end
of the tunnel. Cisco SDM will create a static route entry for the packets with a
destination address in that network. This field is disabled when Tunnel all traffic
is selected.
You must ensure that the IP address entered in this field is reachable before you
configure this option. If it is not reachable, no tunnel will be established.
Network Mask
Enabled with split tunneling. Enter the network mask used on the network at the
other end of the tunnel. This field is disabled when Tunnel all traffic is selected.
Select Routing Protocol
Use this window to specify how other networks behind your router are advertised
to the other routers in the network. Select one of the following:
• EIGRP—Extended Interior Gateway Routing Protocol.
• OSPF—Open Shortest Path First.
• RIP—Routing Internet Protocol.
• Static Routing. This option is enabled when you are configuring a GRE over
IPSec tunnel.
Note RIP is not supported for DMVPN Hub and spoke topology but is available for
DMVPN Full Mesh topology.