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26-13
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 26 GRE and DM VPNs
Dynamic Multipoint VPNs (DMVPN)
Table 26-2 GRE Modes Page for DMVPN
Element Description
Routing Parameters Tab
Routing Protocol Select the required dynamic routing protocol, or static route, to be used
in the DMVPN tunnel.
Options include the EIGRP, OSPF, and RIPv2 dynamic routing
protocols, and GRE static routes. On-Demand Routing (ODR) is also
supported. On-Demand Routing is not a routing protocol. It can be used
in a hub-and-spoke VPN topology when the spoke routers connect to no
other router other than the hub. If you are running dynamic protocols,
On-Demand Routing is not suitable for your network environment.
For more information, see Understanding GRE, page 26-2.
AS Number
(EIGRP only.)
The number that is used to identify the autonomous system (AS) area
to which the EIGRP packet belongs. The range is 1-65535. The default
is 110.
An autonomous system (AS) is a collection of networks that share a
common routing strategy. An AS can be divided into a number of areas,
which are groups of contiguous networks and attached hosts. Routers
with multiple interfaces can participate in multiple areas. An AS ID
identifies the area to which the packet belongs. All EIGRP packets are
associated with a single area, so all devices must have the same AS
number.
Hello Interval
(EIGRP only.)
The interval between hello packets sent on the interface, from 1 to
65535 seconds. The default is 5 seconds.
Hold Time
(EIGRP only.)
The number of seconds the router will wait to receive a hello message
before invalidating the connection. The range is 1-65535. The default
hold time is 15 seconds (three times the hello interval)
Delay
(EIGRP only.)
The throughput delay for the primary route interface, in microseconds.
The range of the tunnel delay time is 1-16777215. The default is 1000.
Bandwidth
(EIGRP only.)
The bandwidth for the primary route interface, in kilobits. The range of
bandwidth is 1 to 10000000. The default is 1000.
Bandwidth
(EIGRP only.)
The amount of bandwidth available to the primary route interface for
the EIGRP packets. You should enter a value that gives priority to the
primary route over other routes.
You can enter a value in the range 1 to 10000000 kb. The default is 1000
kb.
Note By default, the cost of sending a packet on an interface is
calculated based on the bandwidth—the higher the bandwidth,
the lower the cost.
Process Number
(OSPF only.)
The routing process ID number that will be used to identify the secured
IGP that Security Manager adds when configuring DMVPN.
The valid range for either protocol is 1-65535. The default is 110.