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Cisco Router and Security Device Manager 2.5 User’s Guide
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Chapter15 DMVPN
Dynamic Multipoint VPN
Add—Click to add a network, or a group of networks, to advertise.
Edit—Click to edit the data for an advertised network or group of networks. This
button is enabled for entries that you created during the current instance of this
wizard.
Delete—Click to delete the data for the selected network or group of networks.
This button is enabled for entries that you created during the current instance of
this wizard.
Dynamic Multipoint VPN (DMVPN) Spoke Wizard
This wizard helps you to configure your router as a spoke in a DMVPN network.
Before starting the configuration, you should ping the hub to be sure that your
router can send traffic to it. Also you should have all the information about the
hub you need before you begin. A hub administrator who uses Cisco SDM to
configure the hub can generate a text file that contains the hub information spoke
administrators need.
You need to obtain the following information before you begin:
•The IP address of the hub’s physical interface.
•The IP address of the hub’s mGRE tunnel interface.
•The IP address and subnet mask the hub administrator tells you to use for your
spoke. The hub administrator must assign addresses to each spoke to ensur e
that all routers in the DMVPN are in the same subnet, and that each is using
a unique address.
•The routing protocol to use, and the AS number (EIGRP) or Process ID
(OSPF) that is to be used to send routing updates in the DMVPN.

DMVPN Network Topology

Select the type of DMVPN network this router is a part of.

Hub and Spoke Network

Select this option if you are configuring the router in a network where each spoke
router has a point-to-point GRE over IPSec connection t o the DMVPN hub, and
will send traffic destined for other spokes through the hub. When you select this
option, the graphic displays links from the spokes to the hub.