AppendixB Site-to-Site VPN User Interface Reference
Site to Site VPN Policies
B-68
User Guide for CiscoSecurity Manager3.0.1
OL-8214-02
Server Load Balance When selected, enables the configuration of load balancing on a
Cisco IOS router that serves as a hub in a multiple hubs
configuration.
Server load balancing optimizes performance in a multiple hubs
configuration, by sharing the workload. In this configuration, the
DMVPN server hubs share the same tunnel IP and source IP
addresses, presenting the appearance of a single device to the
spokes in a VPN topology.
Enable IP Multicast When selected, enables multicast transmissions across your GRE
tunnels.
IP multicast deliversapplication source traffic to multiple receivers
without burdening the source or the receivers, while using a
minimum of network bandwidth.
Rendezvous Point Only available if you selected the Enable IP Multicast check box.
If required, you can enter the IP address of the interface that will
serve as the rendezvous point (RP) for multicast transmission.
Sources send their trafficto the RP. This trafficis then forwarded to
receivers down a shared distribution tree.
Tunnel Key A number that identifies the tunnel key.The default is 1.
The tunnel key differentiates between different multipoint GRE
(mGRE)tunnel Non Broadcast Multiple Access (NBMA) networks.
AllmGRE interfaces in the same NBMA network must use the same
tunnel key value. If there are two mGRE interfaces on the same
router, they must have different tunnel key values.
Note To view the newly created tunnel interfaces in the Router
Interfaces page, you must rediscover the device inventory
details after successfully deploying the VPN to the device.
For more information, see Configuring Cisco IOS Router
Interfaces, page 12-2.
TableB-22 GRE Modes Page> DMVPN Policy (continued)
Element Description