Cisco Systems 2.5 Cisco SDM Warning: DMVPN Dependency

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Cisco Router and Security Device Manager 2.5 User’s Guide
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Chapter15 DMVPN
Dynamic Multipoint VPN
Re-register with hub when IP address of interface-name changes—This option
is available when the interface you selected receives a dynamic IP address via
DHCP or IPCP. Specifying’ this option will allow the spoke to re-register with the
hub when it receives a new IP address.
IP Address
Enter the IP address for the GRE interface to this hub. This must be a private
address and be in the same subnet as the GRE interfaces of the other routers in the
network. For example, the GRE interfaces might share the subnet 10.10.6.0, and
be given IP addresses in the range 10.10.6.1 through 10.10.6.254.
If you are configuring a spoke router, you must use the IP address assigned to your
router by the hub administrator. Failure to do so may result in address conflicts.
Subnet Mask
Enter the mask for the subnet that the GRE interfaces are in. This mask must be
assigned by the hub administrator and be the same for all routers in the DMVPN.
For example, the mask for the subnet 10.10.6.0 could be 255.255.255.0. For more
information, see IP Addresses and Subnet Masks.
Advanced Button
Click this button to provide NHRP and tunnel parameters for this connection.
Cisco SDM provides default values for advanced tunnel settings. However, the
hub administrator must decide on the tunnel settings and give them to the
personnel administering spoke routers so that they can make matching settings. If
you are configuring a spoke router, obtain the tunnel settings from the hub
administrator, click this button, and enter them in the dialog box displayed.
Cisco SDM Warning: DMVPN Dependency
This window appears when the interface you have chosen for the DMVPN tunnel
source has a configuration that prevents its use for DMVPN. Cisco SDM informs
you of the conflict and gives you the option of allowing Cisco SDM to modify the
configuration so that the conflict is removed.