Cisco Systems CL-28826-01 Security Camera User Manual


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User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 26 GRE and DM VPNs
Dynamic Multipoint VPNs (DMVPN)
Tunnel Parameters Tab
Tunnel IP Range The IP address range of the inside tunnel interface IP address, including
the unique subnet mask. This field defines a subnet, such as
10.1.1.0/24.
Note If Security Manager detects that a tunnel interface IP address
already exists on the device, and its IP address matches the
tunnel’s IP subnet field, it will use that interface as the GRE
tunnel.
Dial Backup Tunnel IP
Range
If you are configuring a dial backup interface, enter its inside tunnel
interface IP address range, including the unique subnet mask. This field
defines a subnet.
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 delivers application 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 traffic to the RP. This traffic is 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. All
mGRE 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 for routers that are members of the VPN, you
must rediscover the device inventory details after successfully
deploying the VPN to the device.
NHRP Parameters
Network ID All Next Hop Resolution Protocol (NHRP) stations within one logical
Non-Broadcast Multi-Access (NBMA) network must be configured
with the same network identifier. Enter a globally unique, 32-bit
network identifier within the range of 1 to 4294967295.
Table 26-2 GRE Modes Page for DMVPN (Continued)
Element Description