Appendix B
Site to Site VPN Policies
Table | GRE Modes Page > DMVPN Policy (continued) | |
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Element |
| Description |
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Server Load Balance | When selected, enables the configuration of load balancing on a | |
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| Cisco IOS router that serves as a hub in a multiple hubs |
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| configuration. |
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| Server load balancing optimizes performance in a multiple hubs |
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| configuration, by sharing the workload. In this configuration, the |
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| DMVPN server hubs share the same tunnel IP and source IP |
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| addresses, presenting the appearance of a single device to the |
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| spokes in a VPN topology. |
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| |
Enable IP Multicast | When selected, enables multicast transmissions across your GRE | |
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| tunnels. |
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| IP multicast delivers application source traffic to multiple receivers |
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| without burdening the source or the receivers, while using a |
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| minimum of network bandwidth. |
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| |
Rendezvous Point | Only available if you selected the Enable IP Multicast check box. | |
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| If required, you can enter the IP address of the interface that will |
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| serve as the rendezvous point (RP) for multicast transmission. |
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| Sources send their traffic to the RP. This traffic is then forwarded to |
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| receivers down a shared distribution tree. |
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|
Tunnel Key |
| A number that identifies the tunnel key. The default is 1. |
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| The tunnel key differentiates between different multipoint GRE |
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| (mGRE) tunnel Non Broadcast Multiple Access (NBMA) networks. |
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| All mGRE interfaces in the same NBMA network must use the same |
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| tunnel key value. If there are two mGRE interfaces on the same |
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| router, they must have different tunnel key values. |
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| Note To view the newly created tunnel interfaces in the Router |
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| Interfaces page, you must rediscover the device inventory |
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| details after successfully deploying the VPN to the device. |
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| For more information, see Configuring Cisco IOS Router |
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| Interfaces, page |
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| User Guide for Cisco Security Manager 3.0.1 |
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